CN1681799A - 14位官能化的紫杉烷衍生物及其制备方法 - Google Patents

14位官能化的紫杉烷衍生物及其制备方法 Download PDF

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CN1681799A
CN1681799A CNA038213389A CN03821338A CN1681799A CN 1681799 A CN1681799 A CN 1681799A CN A038213389 A CNA038213389 A CN A038213389A CN 03821338 A CN03821338 A CN 03821338A CN 1681799 A CN1681799 A CN 1681799A
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G·丰塔纳
E·邦巴尔代利
A·巴塔哥利亚
E·巴尔代利
A·圭里尼
M·L·杰尔米
G·卡伦奇
D·波卡尔
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Abstract

本发明描述了将式I的13-酮基浆果赤霉素衍生物在14位官能化以得到其中的取代基如本发明中所定义的式II衍生物的通用方法。本发明还描述了式II化合物向其中的取代基如本发明中所定义的式III化合物的转化。

Description

14位官能化的紫杉烷衍生物及其制备方法
发明内容
本发明涉及新的13-酮基浆果赤霉素III和紫杉烷衍生物及其制备方法。
技术背景
WO 94/22856公开了比传统紫杉烷具有更强的抗肿瘤活性的14-羟基-紫杉烷。所述的14-羟基衍生物之一称为IDN 5109,目前正处于临床研究后期。由天然的14-羟基浆果赤霉素可容易地制备所述的14-羟基化的衍生物。
现已发现:在14位上具有非羟基取代基的IDN 5109类似物具有惊人的生物学活性,它们不仅可有效对抗对紫杉烷有抗性的肿瘤,而且可有效对抗MDR细胞系。
本发明的衍生物可通过将13-酮基浆果赤霉素III烯醇化并与可被转化为所需基团的合适的亲电子试剂反应来获得。然后还原C13位的羰基并用异丝氨酸链酯化即可得到以下所定义的本发明的化合物。
作为制备12,13-异构紫杉烷(isotaxane)(Wicnienski等人,US5,821,363)、13位修饰的(Menichincheri等人,WO9614308)和C和D环修饰的(Dubois等人,Tetrahedr.Lett.2000,41,3331-3334;Uoto等人,Chem.Pharm.Bull.1997,45(12),2093-2095)的新型紫杉烷的关键中间体,7位被保护的13-酮基浆果赤霉素III是一种备受关注的化合物。在关于紫杉醇及其类似物整个合成的研究中,7位被保护的13-酮基浆果赤霉素III是一种重要的中间体(Nicolaou等人,J.Am.Chem.Soc.1995,117,624-633;Nicolaou等人,1995,117,2409-2420;Nicolaou等人,US 5,504,222)。关于7位被保护的13-酮基浆果赤霉素III的一些修饰已有报道,例如形成腙和肟(Menichincheri等人,WO9614308;Meninchincheri等人,Med.Chem.Res.(1996),6(4),264-292)、直接与氧化剂反应(Bombardelli等人,WO0212215;Harriman等人,Tetrahedr.Lett.1995,36(49),8909-8912)或与还原剂反应(Marder等人,Tetrahedr.1995,51(7),1985-1994)。关于13,14位烯醇化的反应迄今尚未见报道,而现有文献已公开了在碱中的重排反应(Pinciroli等人,Tetrahedr.Lett.1996,37(52),9365-9368;Yu和Liu,Tetrahedr.Lett.1997,38(23),4133-4136)。
另一方面,本发明涉及将13-酮基浆果赤霉素III的3,14位烯醇化以得到足够稳定可用于进一步反应的中间体的方法。
发明详述
本发明的化合物具有以下通式III:
Figure A0382133800101
其中:
X为-N3、-NH2、-NH-R3、=CH-R8,或者当R6不是苯基时为-O-R3
R2为氢或酰基;
R3为C1-C4烷氧羰基,或者与R4一起形成羰基、硫代羰基、SO、SO2基团;
R4为氢,或者与R3或R8一起形成R3和R8的各自定义中所列举的基团;
R5为氢或醇保护基;
R6为芳基、取代的芳基、杂芳基,条件是当X是-O-R3时,其不是苯基;
R8是氢、C1-C4烷基、C1-C4烷氧羰基,或者与R4一起形成羰基;
R9为酰基或羟氨基酰基。
式III化合物可以由式II化合物制备,而式II化合物可通过将式I的13-酮基浆果赤霉素III衍生物进行转化得到:
Figure A0382133800111
在式I和II中:
R1为醇保护基;
R2为酰基或醇保护基;
E为-OH、-O-R3、=N2、-N3、-NH2、-NH-R3、-NH-NH2、-NH-N=N-Ts、-NH-N=N-Boc、-N(CO2R7)NHCO2R7、=CH-R8
Ts为对甲苯磺酰基;
R3为C1-C4烷氧羰基,或者与R4一起形成羰基、硫代羰基、SO、SO2基团;
R4为氢,或者与R3或R8一起形成R3和R8的各自定义中所列举的基团;
R5为氢或醇保护基;
R6为芳基、取代的芳基、杂芳基;
R7为C1-C4烷基、芳基或芳基烷基;
R8为氢、C1-C4烷基、C1-C4烷氧羰基,或者与R4一起形成羰基。
式III的化合物可用于治疗各种起因的瘤形成,特别是如卵巢、乳腺、肺、结肠、脑等器官的肿瘤,还可用于治疗白血病和黑素瘤。
在式I、II和III的化合物中,酰基优选为直链或支链的C2-C6脂肪族酰基或任选被一个或多个C1-C4烷基、C1-C4烷氧基、卤素取代的苯甲酰基;芳基优选为苯基;取代的芳基优选为被一个或多个C1-C4烷基、C1-C4烷氧基、卤素取代的苯基;杂芳基优选为2-、3-或4-吡啶基、2-或3-呋喃基、2-或3-噻吩甲酰基;芳基烷基优选为苄基;羟氨基酰基优选为在氨基上被苯甲酰基或C1-C4烷氧羰基取代的β-异丁基异丝氨酸或苯基异丝氨酸残基。
根据本发明,其中E为-OH、=N2、-N3、-NH-N=N-Ts、-NH-N=N-Boc、-N(CO2R7)NHCO2R7、=CH-R8的式II化合物可通过以下流程图中所示的且包括以下步骤的方法由式I的合适的13-酮基浆果赤霉素III的被保护的衍生物获得:
a)与碱反应以形成式IV的烯醇化物,其中M为碱金属;
b)使烯醇化物IV与可被转化为E基团的合适的亲电子试剂反应,得到式II化合物。
流程图
步骤a)中的烯醇化物的形成可通过使被保护的13-酮基浆果赤霉素III与碱如叔丁醇钾、二(三甲基甲硅烷基)氨基钾、二异丙基胺锂在惰性溶剂如四氢呋喃或乙醚中以及在六甲基磷酰胺(HMPA)或1,3-二甲基-3,4,5,6-四氢-2[1H]-嘧啶酮(DMPU)的混合物中反应来实现。该反应适合在-40℃至-78℃的温度下进行。
特别优选的保护基是甲硅烷基醚、缩醛、醚、碳酸酯和氨基甲酸酯。
如文献中所述,通过与常规氧化剂反应可由被适宜保护的浆果赤霉素容易地获得起始的13-酮基浆果赤霉素III(式I)。
在2位上具有不同的苯甲酸酯基团的7位被保护的13-酮基浆果赤霉素III可根据Ojima等人(J.Am.Chem.Soc.2000,122,5343-5353)的方法制备。
在报道的实施例中,R1通常为叔丁氧羰基(Boc)、三乙基甲硅烷基(TES)或2-甲氧基丙烷(MOP),且R2通常为乙酰基,但也可以方便地使用其它等价基团来制备相似化合物。
根据以上流程图,在步骤b)中,烯醇化物IV在原位与亲电子试剂如氧氮杂环丙烷(oxaziridine)(例如N-苯磺酰基苯基氧氮杂环丙烷、N-苯磺酰基间硝基苯基氧氮杂环丙烷和樟脑磺酰基氧氮杂环丙烷)、重氮二甲酸酯(例如重氮二甲酸二叔丁酯和重氮二甲酸二苄酯)、对甲苯磺酰叠氮、叔丁氧羰基叠氮、醛(例如乙醛、乙醛酸乙酯)反应,以得到其中E为-OH、-NH-N=N-Ts、-NH-N=N-Boc、-N(CO2R7)NHCO2R7,=CH-R8的式II的13-酮基浆果赤霉素III。
当用对甲苯磺酰叠氮作为亲电子试剂时,除了其中E为N3或N2的分解产物外,还获得其中E为NH-N=N-Ts的产物(或其互变异构体N=N-NHTs)。可以调整反应的猝灭条件以便使反应主要仅生成这些产物中的一种。因此,可以通过用极性非质子溶剂如二氯甲烷或乙酸乙酯萃取而从粗产物中回收甲苯磺酰叠氮基衍生物。任选在加热条件下将反应粗品在极性非质子溶剂中搅拌适当长的时间即获得重氮基衍生物。通过在加入叠氮供体后立即用质子试剂如乙酸的THF溶液与DMPU或HMPA的混合物处理反应粗品即获得叠氮基衍生物。
当用乙醛酸乙酯作为亲电子试剂时,在C1位羟基上的乙氧羰基环合和丁烯酸缩合同时发生,得到α,β-不饱和的γ-内酯。
在所有情况下,反应的非对映选择的结果是主要以14β构型引入E基团。
或者,烯醇化物IV可与甲硅烷基化剂(例如三异丙基氯硅烷)、酰化剂(例如焦碳酸二叔丁酯)、烷基化剂(例如硫酸二甲酯或甲基碘)或磷酰化剂反应,由此获得式V的烯醇衍生物:
其中:
R10为酰基、烷基、三烷基甲硅烷基或磷酸酯,且
R1、R2和R6如以上所定义。
化合物V也可以通过将式II的酮用特别弱的碱如三乙胺或吡啶在非质子溶剂如二氯甲烷、甲苯或其混合物中烯醇化而容易地获得。
化合物V通过在合适的条件下与亲电子试剂反应可生成式II化合物。
用上述方法在14位引入的基团可被进一步转化以得到其它的在14位官能化的13-酮基浆果赤霉素III衍生物。
因此,其中E为-N(CO2R7)NHCO2R7的式II化合物可通过用常规方法脱羧而被转化成相应的肼基衍生物(其中E为-NH-NH2)。
其中E为-N3的式II化合物可以用还原体系如在水性介质中的三苯基膦或在合适溶剂中的H2-Pd/C被容易地还原成胺(E=NH2)。
其中E为-OH或-NH2的式II化合物可与羰基化剂(例如羰基二咪唑、光气或三光气)、硫羰基化剂(例如硫代羰基二咪唑、硫光气)或磺酰化剂(例如磺酰氯或亚硫酰氯)反应,以获得其中E为-OR3或-NHR3的式II化合物。该反应可方便地在氯化溶剂中、于碱(例如吡啶或三乙胺)存在下、在-40℃至70℃的温度下进行。
或者,其中E为-OH或-NH2的式II化合物可于弱碱存在下用试剂如烷基卤或苄基卤进行烷基化。
式II化合物是合成本发明的式III化合物的重要中间体。具体而言,化合物III可通过包括以下步骤的方法由其中E为-O-R3、-N3、-NH-R3、=CH-R8且R1、R4、R6如以上所定义的式II化合物获得:
Figure A0382133800151
a)还原C13位羰基,得到式VII的化合物:
其中:
X为-O-R3、-N3、-NH-R3、-CH2-R8
Y和Z为氢,或者当X为-CH2-R8时,两者一起形成双键;
并且其它基团如以上所定义;
b)用式IX的酸衍生物在13位酯化,得到式VIII的化合物:
Figure A0382133800161
其中:
R4、R5、R6、R9如以上所定义;
X为-O-R3、-N3、-NH-R3、=CH-R8
c)任选裂解保护基。
步骤a)中C13位酮的还原用合适的氢化物如硼氢化钠、硼氢化锂、硼氢化四丁基铵、硼氢化四乙基铵、三乙酰氧基硼氢化钠进行。该反应可以用化学计算量的还原剂进行,尽管通常优选过量的还原剂。根据所用的还原剂,该反应在醇、醚、醇和醚的混合物或惰性溶剂中、于-50℃至0℃的温度下进行。
步骤b)中的C13位酯化通常通过于缩合剂如碳二亚胺(例如二环己基碳二亚胺或乙基二甲氨基丙基碳二亚胺)存在下与式IX的羧酸或相应的盐作用来进行:
Figure A0382133800162
其中:
R11和R13,可以相同或不同,为C1-C6烷基、芳基或杂芳基;
R12为C1-C6烷基、芳基、杂芳基或C1-C4烷氧基。
也可以成功地使用其它已知的方法将7位被保护的浆果赤霉素III的13位进行酯化。
步骤c)中的保护基可在关于保护基的文献中所述的条件下被除去。
最优选的羧酸是式X的N-Boc-异丁基异丝氨酸衍生物:
Figure A0382133800171
在该情况下,在实施例中所述的条件下与式VII化合物偶联,得到式XI的化合物:
将式XI化合物的7位选择性去保护,得到式XII的化合物:
将式XII化合物的噁唑烷环打开,得到式XIII的化合物:
Figure A0382133800181
其中:
X、R3、R4和R6如以上所定义。
在该情况下,C13位酯化用式X的羧酸进行,C7位去保护优选在打开噁唑烷环之前完成。
其中X为-N3的式XI的衍生物特别重要,因为其是根据上述方法的替代制备方法来制备式XIV化合物的有用中间体:
Figure A0382133800182
其中:
R3为氢、酰基、烷基,或者与R4一起形成C=O、C=S、SO、SO2基团;
R4为氢,或者与R3一起形成C=O、C=S、SO、SO2基团;
所述的替代制备方法包括:
a)还原14位叠氮基,得到式XV的化合物:
Figure A0382133800191
b)任选与酰化剂或烷基化剂反应,得到式XVI的化合物:
c)裂解C7位的保护基并打开噁唑烷环,得到式XIV的化合物。
在式XIV、XV和XVI中,R3、R4、R5和R6具有与以上的定义相同的含义。
对于预期的治疗应用,式III化合物将以合适的药物制剂形式、主要通过胃肠外途径施用,并且原则上施用剂量与市售可得的紫杉烷衍生物(例如泰素和多西他赛)在临床实践中已使用一段时间的剂量相似。
以下实施例用于更详细地举例说明本发明。
实施例1
7-Boc-13-酮基浆果赤霉素III
向20℃的13-酮基浆果赤霉素III(1.10g,1.9mmol)在CH2Cl2(0.5mL)中的溶液中加入四氯化碳(14mL)。产生部分浆果赤霉素衍生物沉淀。然后,在搅拌和氩气流下加入1-甲基咪唑(23μL,0.28mmol)和二碳酸二叔丁酯(1.03g,4.7mmol)。8小时后,加入另外的1-甲基咪唑(16.0μL,0.20mmol)。将该溶液在25℃下放置24小时,然后在减压下蒸除溶剂。将油状残余物溶解在1∶1丙酮/水混合物(10mL)中并在20℃下放置约16小时。将沉淀滤出、用正戊烷洗涤并干燥,得到1.12g标题产物。将母液进行色谱分离,得到另外0.12g产物(SiO2,正己烷/EtOAc,1.5∶1.0)。由此获得1.24g产物(1.81mmol,95%)。[a]D 20=-35.6°(c 1.05,CHCl3);IR(CDCl3,cm-1):3483,1731,1676,1371,1274;1H-NMR(CDCl3,400MHz):δ=1.20(s,3H,Me),1.22(s,3H,Me),1.47(s,9H,3Me),1.76(s,3H,Me),1.91(m,1H,Hβ-6,J1=10.4Hz,J2=14.8Hz,J3=2.0Hz),1.92(b,1H,OH),2.17(s,3H,Me),2.19(s,3H,Me),2.20(s,3H,Me),2.64(m,1H,Hα-6,J1=7.2Hz,J2=14.8Hz,J3=9.5Hz),2.66(d,1H,H-14,J=19.6Hz),2.94(d,1H,H-14,J=19.6Hz),4.02(d,1H,H-3,J=6.8Hz),4.09(d,1H,H-20,J=9.0Hz),4.32(d,1H,H-20,J=9.0Hz),4.94(d,1H,H-5,J1=9.5Hz,J2=2.0Hz),5.39(m,1H,H-7,J1=10.4Hz,J2=7.2Hz),5.67(d,1H,H-2,J=6.8Hz),6.57(s,1H,H-10),7.44-7.50(m,2H,芳族),7.61-7.64(m 1H,芳族),8.30(d,2H,芳族);13C-NMR(CDCl3,100MHz):β=10.7,14.0,18.4,21.0,21.9,27.9,33.1,33.6,42.7,46.7,57.3,72.8,74.7,76.3,76.5,77.4,78.7,80.5,83.4,84.0,128.9,129.0,130.3,134.3,141.0,152.4,152.5,167.0,168.3,170.3,198.4,200.5。C36H44O13的分析计算值:C,63.15;H,6.48。实测值:C,63.39;H,6.60。
实施例2
7-TES-13-酮基浆果赤霉素III
将13-酮基浆果赤霉素III(5g,8.5mmol)、三乙基氯硅烷(3.6ml,21.4mmol,2.5当量)和N-甲基咪唑(2.73ml,34.3mmol,4当量)溶解在无水二氯甲烷(25mL)中。将该溶液在室温下搅拌1.5小时,然后通过将其小心地倒入2M的NaHSO4溶液(25ml)中使反应停止。将水相用DCM(2×10mL)反复萃取,并将合并的有机相用盐水(2×20mL)洗涤。将有机相用硫酸钠干燥并蒸除溶剂,得到4.7g标题产物,其无需进一步纯化直接用于随后的步骤。M.p.:212℃。TLC:cHex-AcOEt 1∶1,Rf=0.57。1H-NMR(200MHz,CDCl3):δ0.58-0.66(m,6H,Si-CH2),0.90-0.98(t,J=8.4,9H,CH2CH3),1.21(s,3H,17-Me),1.27(s,3H,16,-Me),1.69(s,3H,19-Me),1.83-1.96(m,1H,6-H),2.20(s,3H,18-Me),2.21(s,3H,10-OAc),2.25(s,3H,4-OAc),2.48-2.65(m,1H,6-H),2.81(ABq,2H,14-H),3.93(d,J=6.6,1H,3-H),4.25(ABq,2H,20-H),4.51(dd,J=10.6,7.0,1H,7-H),4.94(d,J=7.7,1H,5-H),5.72(d,J=7.0,1H,2-H),6.61(s,1H,10-H),7.52(t,J=6.2,2H,Bz),7.64(t,J=6.2,1H,Bz),8.10(dd,J=7.4,1.1,2H,Bz)。
实施例3
14β-叠氮基-7-Boc-13-酮基浆果赤霉素III
在氮气流和剧烈搅拌下,于2分钟内将7-Boc-13-酮基浆果赤霉素III(0.149g,0.22mmol)在THF(1.8mL)和DMPU(0.8mL)中的溶液加至-75℃的叔丁醇钾(0.064g,0.568mmol)在无水THF(1.5mL)中的混悬液中。15分钟后,在-75℃下、于2分钟内加入溶解在0.7ml THF中的0.063g(0.33mmol)甲苯磺酰叠氮。2小时后,使温度升高至-50℃,通过加入0.057mL(1.00mmol)冰醋酸使反应停止。使温度缓慢升高至20℃,19小时后,将反应混合物用15ml Et2O稀释并用10ml NH4Cl饱和水溶液萃取。将有机相用水洗涤3次、干燥、过滤并在减压下蒸发。将残余物进行色谱分离(SiO2,正己烷/EtOAc,1.7∶1.0),得到0.080g(0.10mmol,50%)标题产物。IR(KBr,cm-1):2976,2935,2122,1731,1272;1H-NMR(CDCl3,400MHz):δ=1.01(s,3H,Me),1.22(s,3H,Me),1.47(s,9H,3Me),1.81(s,3H,Me),1.96(m,1H,Hβ-6,J1=2.0Hz,J2=10.8Hz,J3=14.0Hz),2.19(s,3H,Me),2.20(s,3H,Me),2.24(s,3H,Me),2.62(m,1H,Hα-6,J1=7.2Hz,J2=9.6Hz,J3=14.0Hz),3.11(s,1H,OH),3.98(d,1H,H-3,6.8Hz),4.24(d,1H,H-20,J=8.4Hz),4.26(s,1H,H-14),4.33(d,1H,H-20,J=8.4Hz),4.93(d,1H,H-5,J1=2.0Hz,J2=9.6Hz),5.37(m,1H,H-7,J1=10.8Hz,J2=7.2Hz),5.81(d,1H,H-2,J=6.8Hz),6.56(s,1H,H-10),7.48-7.52(m,2H,芳族),7.60-7.66(m1H,芳族),8.02-8.05(d,2H,芳族);13C-NMR(CDCl3,100MHz):10.8,14.4,19.2,20.9,21.9,27.9,33.5,33.7,43.3,45.8,54.0,57.2,65.4,72.5,74.4,75.5,75.8,76.1,81.0,83.5,83.7,129.1,129.2,130.0,134.1,138.8,152.5,153.8,165.4,168.2,170.0,196.6,199.8。C36H43N3O13的分析计算值:C,59.58;H,5.97。实测值:C,59.81;H,5.85。MS mz 725.1(M+C36H43N3O13的计算值725.7),687.1,670.0。
实施例4
14-重氮基-7-Boc-13-酮基浆果赤霉素III和14-β-(1-对甲苯磺酰基)三氮烯基-7-Boc-13-酮基浆果赤霉素III
在氮气流和剧烈搅拌下,于2分钟内,将7-Boc-13-酮基浆果赤霉素III(0.03g,0.04mmol)在THF(0.7mL)和HMPA(0.2mL)中的溶液加至-75℃的叔丁醇钾(0.013g,0.04mmol)在无水THF(0.7mL)中的混悬液中。15分钟后,在-75℃下、于2分钟内加入溶解在0.2ml THF中的0.013g(0.07mmol)甲苯磺酰叠氮。2小时后,并且使温度升高至-50℃后,通过加入5.0mL NH4Cl饱和溶液使反应停止。使温度缓慢升高至20℃,将反应混合物用3.0ml Et2O稀释并用6.0ml NH4Cl饱和水溶液萃取。将有机相用水洗涤3次、干燥、过滤并在减压下蒸发。将残余物进行色谱分离(SiO2,正己烷/EtOAc,1.7∶1.0),得到0.080g(0.10mmol,45%)7-Boc-14-重氮基-13-酮基浆果赤霉素III和14β-(1-对甲苯磺酰基)三氮烯基-7-Boc-13-酮基浆果赤霉素III(0.025g,0.028mmol,13%),为3∶1的互变异构体混合物。
14-重氮基-7-Boc-13-酮基浆果赤霉素III:IR(KBr,cm-1):3500-3100,2982,2935,2095,1734,1656,1633,1272;1H-NMR(CDCl3,400MHz):δ=1.23(s,3H,Me),1.31(s,3H,Me),1.48(s,9H,3Me),1.77(s,3H,Me),1.92(m,1H,Hβ-6,J1=1.5Hz,J2=10.8Hz,J3=14.0Hz),2.18(s,3H,Me),2.19(s,3H,Me),2.22(s,3H,Me),2.63(m,1H,Hα-6,J1=6.8Hz,J2=8.0Hz,J3=14.0Hz),4.04(d,1H,H-3,6.4Hz),4.08(d,1H,H-20,J=8.4Hz),4.36(d,1H,H-20,J=8.4Hz),4.95(d,1H,H-5,J1=1.5Hz,J2=8.0Hz),5.41(m,1H,H-7,J1=10.8Hz,J2=6.8Hz),5.85(d,1H,H-2,J=7.2Hz),6.50(s,1H,H-10),7.48-7.54(m,2H,芳族),7.62-7.68(m 1H,芳族),8.40-8.80(d,2H,芳族);13C-NMR(CDCl3,100MHz):11.1,14.4,18.7,21.0,27.9,32.9,33.5,43.0,46.1,56.6,65.4,73.7,74.5,76.2,76.3,79.5,80.4,83.5,84.0,128.3,129.1,130.4,134.5,141.1,145.7,152.5,167.3,168.3,170.4,184.1,200.9。C36H42N2O13的分析计算值:C,60.84;H,5.96。实测值:C,60.71;H,5.95。MS mz 710.2(M+C36H42N2O13的计算值710.7),687.1,670.0。
14-β-(1-对甲苯磺酰基)三氮烯基-7-Boc-13-酮基浆果赤霉素III:1H-NMR(CDCl3,400MHz,21℃):δ=1.26(s,3H,Me),1.29(s,3H,Me),1.43(s,9H,3Me,次要),1.46(b,9H,3Me,主要),1.54(s,3H,Me),1.67(s,3H,Me),1.85(m,1H,Hβ-6,J1=1.5Hz,J2=10.0Hz,J3=14.0Hz),2.05-2.18(b,9H,3Me),2.86(m,1H,Hα-6,J1=7.0Hz,J2=8.0Hz,J3=14.0Hz),3.98(d,1H,H-3,J=11.0Hz,次要),4.10(d,1H,H-3,J=10.8Hz,主要),4.39(d,1H,H-20,J=8.4Hz),4.61(d,1H,H-20,J=8.4Hz),4.87(s,1H),4.95(d,1H,H-5,J1=1.5Hz,J2=8.0Hz),5.34(s,1H),5.51(m,1H,H-7,J1=10.8Hz,J2=7.0Hz),5.78-5.88(m,1H,H-2,主要,J=10.8Hz和1H,H-2,次要),6.42-6.46(b,1H,H-10,主要),6.46-6.50(b,1H,H-10,次要),7.28-7.32(m,2H,芳族),7.48-7.54(m,2H,芳族),7.62-7.68(m 1H,芳族),7.79-7.82(m,2H,芳族),8.26-8.30(d,2H,芳族)。
实施例5
14β-氨基-7-Boc-13-酮基浆果赤霉素III
向0.04g(0.05mmol)14β-叠氮基-7-Boc-13-酮基浆果赤霉素III在1.5ml7∶3乙腈-水中的溶液中加入0.013g(0.05mmol)三苯基膦。2小时后,在减压下浓缩反应混合物。将残余物进行色谱分离(SiO2,正己烷/EtOAc,1.4∶1.0),得到0.024g(0.03mmol,71%)标题产物。
IR(KBr,cm-1):3500-3100,3053,2960,1726,1478,1434,1090;1H-NMR(CDCl3,400MHz):0.89(s,3H,Me),1.25(s,3H,Me),1.48(s,9H,3Me),1.84(s,3H,Me),1.98(m,1H,Hβ-6,J1=2.1Hz,J2=10.8Hz,J3=14.4Hz),2.14(s,3H,Me),2.19(s,3H,Me),2.22(s,3H,Me),2.61(m,1H,Hα-6,J1=7.0Hz,J2=9.6Hz,J3=14.4Hz),3.58(s,1H,C14-H),4.01(d,1H,H-3,6.4Hz),4.26(d,1H,H-20,J=8.4Hz),4.33(d,1H,H-20,J=8.4Hz),4.94(d,1H,H-5,J1=2.1Hz,J2=9.6Hz),5.40(m,1H,H-7,J1=10.8Hz,J2=7.2Hz),5.86(d,1H,H-2,J=6.8Hz),6.55(s,1H,H-10),7.44-7.50(m,2H,芳族),7.58-7.63(m 1H,芳族),7.8-8.15(d,2H,芳族);C36H45NO13的分析计算值:C,61.79;H,6.48。实测值:C,61.89;H,6.42。
实施例6
14β-叠氮基-7-TES-13-酮基浆果赤霉素III
在2分钟内和剧烈搅拌下,向在氮气流下的1.40g(2.0mmol)7-TES-13-酮基浆果赤霉素III在7.5ml THF和3.7ml DMPU中的溶液中加入-78℃的5.2mL 1.0M叔丁醇钾的THF溶液。10分钟后,在相同温度下非常缓慢地加入溶解在5.8mL THF中的0.70g(3.6mmol)甲苯磺酰叠氮。1小时30分钟后通过加入0.5mL(9.2mmol)乙酸使反应停止。温度自发达到室温。24小时后,将反应混合物用50ml Et2O稀释并用50ml NH4Cl饱和水溶液萃取。将所得有机相用H2O洗涤3次、干燥、过滤并在减压下浓缩。将残余物进行色谱分离(SiO2,正己烷/EtOAc/Et2O,1.8∶0.7∶0.4),得到1.12g(1.5mmol,76%)标题产物。IR(KBr,cm-1):3600-3100,2956,2878,2117,1730,1370,1238;1H-NMR(CDCl3,400MHz):δ=0.59(m,6H,3CH2),0.93(m,9H,3Me),1.00(s,3H,Me),1.27(s,3H,Me),1.72(s,3H,Me),1.91(m,1H,Hβ-6,J1=2.2Hz,J2=10.7Hz,J3=14.2Hz),2.19(s,3H,Me),2.22(s,3H,Me),2.25(s,3H,Me),2.54(m,1H,Hα-6,J1=6.7Hz,J2=9.7Hz,J3=14.2Hz),3.09(s,1H,OH),3.86(d,1H,H-3,J=6.7Hz),4.24(d,1H,H-20,J=8.6Hz),4.25(s,1H,CHN3),4.33(d,1H,H-20,J=8.6Hz),4.46(m,1H,H-7,J1=10.7Hz,J2=6.7Hz),4.92(d,1H,H-5,J1=2.0Hz,J2=9.5Hz),5.82(d,1H,H-2,J=6.9Hz),6.53(s,1H,H-10),7.47-7.53(m,2H,芳族),7.60-7.65(m 1H,芳族),8.02-8.04(d,2H,芳族);13C-NMR(CDCl3,100MHz):5.6,7.2,10.1,14.4,19.4,21.2,22.1,34.0,37.4,43.4,45.7,59.6,65.5,72.5,72.8,75.5,75.6,76.3,81.3,84.0,129.0,129.2,129.9,134.0,138.2,155.4,165.3,169.0,169.9,196.5,199.5。C37H49N3O11Si的分析计算值:C,60.06;H,6.68。实测值:C,59.87;H,6.79。MS(mz)740.0(M+C37H49N3O11Si的计算值739.9),700.2,621.0,242.3。
实施例7
14-重氮基-7-TES-13-酮基浆果赤霉素III和14β-(1-对甲苯磺酰基)三氮烯基-7-TES-13-酮基浆果赤霉素III
在剧烈搅拌下,向0.22g(0.32mmol)7-TES-13-酮基浆果赤霉素III在3.5ml THF和0.6ml DMPU中的溶液中缓慢加入-78℃的0.8ml 1.0M叔丁醇钾的THF溶液。15分钟后,在-70℃下用注射器加入溶解在0.9ml THF中的0.11g(0.58mmol)甲苯磺酰叠氮。在20分钟内使温度升高至-50℃。1小时后通过加入4ml NH4Cl饱和水溶液使反应停止。使温度升高至20℃,将反应混合物用3ml Et2O稀释并用2ml NH4Cl饱和水溶液萃取。将有机相用H2O洗涤3次、干燥、过滤并在减压下浓缩。将残余物进行色谱分离(SiO2,正己烷/EtOAc,2.1∶1.0),得到0.092g(0.13mmol,40%)7-TES-13-酮基-14-重氮基-浆果赤霉素III和0.062g(0.07mmol,23%)7-TES-13-酮基-14β-(1-对甲苯磺酰基)三氮烯基-浆果赤霉素III,为互变异构体混合物。
14-重氮基-7-TES-13-酮基浆果赤霉素III:IR(KBr,cm-1):3600-3100,2956,2881,2098,1727,1629,1370,1270;1H-NMR(CDCl3,400MHz):δ=0.57(m,6H,3CH2),0.91(m,9H,3Me),1.26(s,3H,Me),1.28(s,3H,Me),1.65(s,3H,Me),1.85(m,1H,Hβ-6,J1=2.2Hz,J2=10.7Hz,J3=14.2Hz),2.16(s,3H,Me),2.20(s,3H,Me),2.21(s,3H,Me),2.53(m,1H,Hα-6,J1=6.7Hz,J2=9.7Hz,J3=14.2Hz),3.89(d,1H,H-3,J=6.8Hz),4.07(d,1H,H-20,J=8.2Hz),4.33(d,1H,H-20,J=8.2Hz),4.47(m,1H,H-7,J1=10.5Hz,J2=6.7Hz),4.92(d,1H,H-5,J1=2.2Hz,J2=9.7Hz),5.84(d,1H,H-2,J=7.2Hz),6.50(s,1H,H-10),7.42-7.50(m,2H,芳族),7.59-7.62(m 1H,芳族),8.10-8.20(d,2H,芳族);13C-NMR(CDCl3,100MHz):5.7,7.2,10.4,14.4,18.9,21.2,22.0,33.1,37.4,43.0,45.9,59.1,69.6,72.3,74.0,76.0,76.5,79.5,80.6,84.2,127.7,128.3,129.0,130.2,130.4,134.3,140.4,146.4,167.0,168.9,170.3,183.9,200.6。C37H48N2O11Si的分析计算值:C,61.31;H,6.67。实测值:C,61.39;H,6.75。
14β-(1-对甲苯磺酰基)三氮烯基-7-TES-13-酮基浆果赤霉素III:IR(KBr,cm-1):3600-3100,2957,1728,1625,1615;1H-NMR(CDCl3,400MHz,60℃)相关共振:δ=0.57-0.64(m,6H,3CH2),0.90-0.96(m,9H,3Me),1.34(s,3H,Me),1.44(s,3H,Me),1.45(s,3H,Me),1.89(m,1H,Hβ-6,J1=3.3Hz,J2=10.8Hz,J3=13.9Hz),2.06-2.10(b,3H,Me),2.10-2.14(b,3H,Me),2.16-2.18(b,3H,Me),2.39-2.44(b,3H,Me),2.58(m,1H,Hα-6,J1=6.3Hz,J2=9.5Hz,J3=13.9Hz),3.80-4.02(b,1H,H-3),4.35(d,1H,H-20,J=8.8Hz),4.62(d,1H,H-20,J=8.8Hz),4.78(m,1H,H-7,J1=10.8Hz,J2=6.3Hz),4.80(s,1H,H-14),4.94(d,1H,H-5,J1=3.3Hz,J2=9.5Hz),5.12-5.30(b,1H,NH),5.80(d,1H,H-2,J=10.8Hz),6.66-6.70(b,1H,H-10),7.24-7.30(m,2H,芳族),7.46-7.50(m,2H,芳族),7.58-7.60(m 1H,芳族),7.78-7.82(d,2H,芳族),8.24-8.28(d,2H,芳族);13C-NMR(CDCl3,100MHz)主要互变异构体的相关共振:5.8(3CH2,次要),6.1(3CH2,主要),7.04(3Me,次要),7.1(3Me,主要),9.1,20.8,21.7,21.8,25.4,26.5,37.5,42.7,71.5,74.7,74.8,78.3,79.2,84.3,126.6,127.5,128.5,128.9,129.3,129.7,130.0,130.7(2CH),133.7,164.7,168.5,170.7,202.2,203.8。
实施例8
14β-叠氮基-7-TES-浆果赤霉素III
在-40℃和剧烈搅拌下,向0.46g(0.63mmol)14β-叠氮基-7-TES-13-酮基浆果赤霉素III在0.7ml THF和12ml乙醇中的溶液中分小份加入0.47g(12.5mmol)硼氢化钠。温度自发升高至-28℃。4天后,通过加入2ml乙酸使反应停止并用15ml乙酸乙酯萃取3次。将有机相干燥、过滤并在减压下蒸发。将粗品进行色谱分离(SiO2,正己烷/EtOAc,2.1∶1.0),得到0.33g(0.44mmol,70%)标题产物。IR(KBr,cm-1):3600-3300,2956,2881,2112,1728,1371,1233;1H-NMR(CDCl3,400MHz):δ=0.59(m,6H,3CH2),0.93(m,9H,3Me),0.98(s,3H,Me),1.24(s,3H,Me),1.71(s,3H,Me),1.90(m,1H,Hβ-6,J1=2.1Hz,J2=10.7Hz,J3=14.2Hz),2.18(s,3H,Me),2.20(m,3H,Me),2.34(s,3H,Me),2.53(m,1H,Hα-6,J1=6.6Hz,J2=9.7Hz,J3=14.2Hz),2.82(b,1H,OH),3.00(s,1H,OH),3.82(d,1H,H-3,J=7.1Hz),3.98(d,1H,CHN3,J=7.3Hz),4.23(d,1H,H-20,J=8.4Hz),4.33(d,1H,H-20,J=8.4Hz),4.46(m,1H,H-7,J1=10.4Hz,J2=6.5Hz),4.80(m,1H,C13-H),4.97(d,1H,H-5,J1=1.9Hz,J2=9.5Hz),5.82(d,1H,H-2,J=7.1Hz),6.41(s,1H,H-10),7.44-7.50(m,2H,芳族),7.58-7.62(m 1H,芳族),8.07-8.1(d,2H,芳族);13C-NMR(CDCl3,100MHz):5.7,7.2,10.4,15.2,21.3,22.1,22.8,26.6,30.1,37.5,43.3,46.8,59.0,68.8,72.5,74.6,75.4,75.7,76.6,76.9,81.3,84.3,128.8,129.4,130.1,133.8,134.3,140.9,165.8,169.4,170.4,201.4。C37H51N3O11Si的分析计算值:C,59.90;H,6.93。实测值:C,60.16;H,6.89。
实施例9
13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-14β-叠氮基-7-TES-浆果赤霉素III
在氮气流和搅拌下,向冷却至0℃的0.074g(0.18mmol)N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酸在5ml甲苯中的溶液中加入0.08g(0.11mmol)7-TES-14β-叠氮基-浆果赤霉素III、0.04g(0.18mmol)二环己基碳二亚胺(DCC)、0.01g(0.12mmol)二甲氨基吡啶(DMAP)和0.003g(0.02mmol)对甲苯磺酸(PTSA)。在70℃下1小时后,将反应混合物冷却并过滤,固体用二氯甲烷洗涤3次;然后,将合并的有机相在减压下蒸发。将反应粗品进行色谱分离(SiO2,正己烷/EtOAc,2.2∶1.0),得到0.089g(0.08mmol,72%)标题产物。IR(KBr,cm-1):3491,2957,2111,1731,1614,1508,1368;1H-NMR(CDCl3,400MHz)相关共振:δ=0.59(m,6H,3CH2),0.93(m,9H,3Me),1.71(s,3H,Me),1.91(m,1H,Hβ-6,J1=2.0Hz,J2=11.2Hz,J3=14.0Hz),2.11(s,3H,Me),2.19(s,3H,Me),2.33(s,3H,Me),2.52(m,1H,Hα-6,J1=6.8Hz,J2=9.6Hz,J3=14.0Hz),3.83(d,1H,H-3),3.83(s,3H,OMe),3.87(s,3H,OMe),4.04(d,1H,H-14,J=8.8Hz),4.24(d,1H,H-20,J=8.0Hz),4.32(d,1H,H-20),4.94(m,1H,H-5),5.88(d,1H,H-2,J=7.6Hz),6.25(d,1H,H-13,J=8.8Hz),7.44-7.50(m,2H,芳族),7.58-7.62(m 1H,芳族),8.07-8.1(d,2H,芳族)。C58H80N4O17Si的分析计算值:C,61.47;H,7.11。实测值:C,60.89;H,7.34。
实施例10
13-(N-Boc-β-异丁基异丝氨酰基)-14β-叠氮基-浆果赤霉素III
在0℃下,向0.080g(0.07mmol)13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-14β-叠氮基-7-TES-浆果赤霉素III在2ml乙腈和2ml吡啶中的溶液中加入0.8mL(0.1mL/10mg底物)氢氟酸-吡啶。半小时后,使温度升高至25℃。3小时后,通过加入4ml NH4Cl饱和溶液使反应停止并用8ml AcOEt萃取3次。将有机相用CuSO4饱和水溶液洗涤3次、干燥、过滤并在减压下蒸发。在0℃下,向所得反应粗品(溶解在1.5ml二氯甲烷中)中加入0.7ml 0.1M乙酰氯在MeOH中的溶液。3小时后,通过加入3ml NH4Cl饱和水溶液使反应停止。将有机相干燥、过滤并在减压下蒸发。进行色谱分离(SiO2,正己烷/EtOAc,1.0∶1.2),得到0.04g(0.05mmol,70%)标题产物。IR(KBr,cm-1):3461,2110,1734,1636,1373,1242,1048;1H-NMR(CDCl3,400MHz):δ=0.97(t,6H,2Me),1.19(s,3H,Me),1.20(s,3H,Me),1.38-1.4(br s.,11H),1.68-1.74(m,1H,H-5′),1.71(s,3H,Me),1.88(s,3H,Me),1.91(m,1H,Hβ-6,J1=2.3Hz,J2=10.7Hz,J3=14.8Hz),2.24(s,3H,Me),2.43(s,3H,Me),2.46-2.52(b,1H,OH),2.57(m,1H,Hα-6,J1=6.6Hz,J2=9.6Hz,J3=14.9Hz),3.76(d,1H,H-3,J=7.1Hz),3.85(d,1H,OH),4.04(d,1H,H-14,J=8.8Hz),4.08(m,1H,H-3′),4.26(d,1H,H-20,J=8.8Hz),4.35(d,1H,H-20),4.39(m,1H,H-7),4.72(d,1H,H-2′),4.98(m,1H,H-5,J1=2.3Hz,J2=9.6Hz),5.88(d,1H,H-2,J=7.1Hz),6.07(d,1H,H-13,J=8.8Hz),6.28(s,1H,H-10),7.44-7.50(m,2H,芳族),7.58-7.62(m1H,芳族),8.07-8.1(d,2H,芳族);13C-NMR(CDCl3,100MHz):10.0,15.3,21.3,22.3,22.7,23.6,23.7,25.1,27.1,28.6,35.9,40.8,43.5,45.3,52.0,59.0,65.5,72.3,74.1,74.8,75.5,76.5,77.2,77.6,80.5,81.6,84.5,128.9,129.1,130.1,133.9,134.9,139.1,156.2,165.7,170.0,171.1,173.4,202.9。C39H53NO11Si的分析计算值:C,62.70;H,7.34。实测值:C,62.36;H,7.49。
实施例11
14β-氨基-7-TES-13-酮基浆果赤霉素III
向0.08g(0.11mmol)14β-叠氮基-7-TES-13-酮基浆果赤霉素III在3.2ml乙腈/水9/1混合溶液中的溶液中加入0.03g(0.12mmol)三苯基膦。将反应在5℃下进行冷却并在18小时后减压蒸发。将残余物进行色谱分离(SiO2,正己烷/EtOAc/Et2O,1.8∶0.7∶0.3),得到0.07g(0.11mmol,97%)标题产物:IR(KBr,cm-1):3500-3100,3053,1730,1438,1239,1063;1H-NMR(CDCl3,400MHz):δ=0.58(m,6H,3 CH2),0.84(s,3H,Me),0.93(m,9H,3Me),1.27(s,3H,Me),1.73(s,3H,Me),1.90(m,1H,Hβ-6,J1=2.0Hz,J2=11.2Hz,J3=14.0Hz),2.12(s,3H,Me),2.19(m,3H,Me),2.21(s,3H,Me),2.52(m,1H,Hα-6,J1=6.4Hz,J2=9.2Hz,J3=14.0Hz),3.57(s,1H,H-14),3.84(d,1H,H-3,J=6.8Hz),4.24(d,1H,H-20,J=8.8Hz),4.30(d,1H,H-20,J=8.8Hz),4.47(m,1H,H-7,J1=10.4Hz,J2=6.4Hz),4.89(d,1H,H-5,J1=2Hz,J2=9.6Hz),5.86(d,1H,H-2,J=6.8Hz),6.50(s,1H,H-10),7.43-7.45(m,2H,芳族),7.61-7.66(m 1H,芳族),7.99-8.01(d,2H,芳族);C43H58N4O15Si的分析计算值:C,59.30;H,6.71。实测值:C,60.3;H,7.19。
实施例12
14β-氨基-7-TES-13-酮基浆果赤霉素III 14,1-氨基甲酸酯
在搅拌下,向-78℃的0.18g(0.26mmol)14β-氨基-7-TES-13-酮基浆果赤霉素III在6ml CH2Cl2中的溶液中加入0.13mL(0.26mmol)1.93M光气的甲苯溶液和0.04mL(0.51mmol)吡啶。1小时后,通过加入5ml水使反应混合物停止反应并用10ml二氯甲烷萃取;将有机相用盐水洗涤3次、干燥、过滤并在减压下蒸发。进行色谱分离(SiO2,正己烷/EtOAc/Et2O,1.8∶0.7∶0.3),得到0.16g(0.22mmol,86%)标题产物。IR(KBr,cm-1):3342,2955,1731,1452,1238,1090;1H-NMR(CDCl3,400MHz):δ=0.60(m,6H,3CH2),0.93(m,9H,3Me),1.14(s,3H,Me),1.34(s,3H,Me),1.73(s,3H,Me),1.92(m,1H,Hβ-6,J1=2.4Hz,J2=10.8Hz,J3=14.0Hz),2.15(s,3H,Me),2.20(m,3H,Me),2.22(s,3H,Me),2.52(m,1H,Hα-6,J1=6.6Hz,J2=9.7Hz,J3=14.0Hz),3.83(d,1H,H-3,J=6.8Hz),4.17(s,1H,H-14),4.23(d,1H,H-20,J=8.8Hz),4.32(d,1H,H-20,J=8.8Hz),4.46(m,1H,H-7,J1=10.7Hz,J2=6.5Hz),4.90(d,1H,H-5,J1=1.9Hz,J2=9.5Hz),6.02(s,1H,N-H),6.06(d,1H,H-2,J=6.9Hz),6.48(s,1H,H-10),7.42-7.45(m,2H,芳族),7.58-7.61(m 1H,芳族),7.96-7.98(d,2H,芳族);13C-NMR(CDCl3,100MHz):5.7,7.2,10.4,14.2,19.8,21.1,22.1,30.1,32.9,37.3,42.6,45.4,59.2,59.3,69.7,72.3,74.9,76.3,80.9,84.2,86.2,128.4,129.0,129.9,134.2,138.9,151.1,155.7,164.6,168.9,170.1,195.6,199.3。C39H51NO12Si的分析计算值:C,62.13;H,6.82。实测值:C,60.16;H,6.89。
实施例13
14β-氨基-7-TES-浆果赤霉素III 14,1-氨基甲酸酯
在搅拌下,向-40℃的0.07g(0.1mmol)14β-氨基-7-TES-13-酮基浆果赤霉素III 14,1-氨基甲酸酯在4ml乙醇中的溶液中加入0.056g(1.49mmol)硼氢化钠。使温度升高至-18℃,然后在4小时后,再加入0.04g(1.0mmol)硼氢化钠。18小时后,通过加入2ml乙酸使反应混合物停止反应并用10ml乙酸乙酯萃取。将有机相干燥、过滤并在减压下蒸发。残余物的1H-NMR谱显示存在14β-氨基-7-TES-浆果赤霉素III 14,1-氨基甲酸酯及其13β差向异构体,以α/β=62/38的比例存在。将混合物进行色谱分离(SiO2,二氯甲烷/EtOAc,1.0∶0.9),得到0.04g(0.06mmol,62%)标题产物。1H-NMR(CDCl3,400MHz):δ=0.58(m,6H,3CH2),0.93(m,9H,3Me),1.08(s,3H,Me),1.26(s,3H,Me),1.70(s,3H,Me),1.88(m,1H,Hβ-6,J1=2.0Hz,J2=10.0Hz,J3=13.2Hz),2.15(s,3H,Me),2.17(m,3H,Me),2.19(s,3H,Me),2.52(m,1H,Hα-6,J1=7.2Hz,J2=9.6Hz,J3=14.0Hz),3.66(b,1H,OH),3.75(d,1H,H-3,J=7.2Hz),3.98(d,1H,H-14 J=6.0Hz),4.15(d,1H,H-20,J=8.4Hz),4.23(d,1H,H-20,J=8.4Hz),4.44(m,1H,H-7,J1=10.0Hz,J2=6.0Hz),4.66(m,1H,H-13),4.93(d,1H,H-5,J1=2.0Hz,J2=8Hz),5.98(d,1H,H-2,J=7.2Hz),6.42(s,1H,H-10),7.41-7.45(m,2H,芳族),7.58-7.61(m 1H,芳族),7.98-8.01(d,2H,芳族);13C-NMR(CDCl3,100MHz):5.7,7.2,10.6,15.1,21.3,22.1,22.6,26.2,30.1,37.4,42.2,46.5,58.9,61.1,71.1,72.3,73.4,75.4,80.7,84.3,88.9,128.8,128.9,129.9,132.5,134.0,143.1,158.2,165.3,169.2,170.3,201.3。C39H53NO12Si的分析计算值:C,61.97;H,7.07。实测值:C,62.3;H,6.93。
实施例14
13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-14β-氨基-7-TES-浆果赤霉素III 14,1-氨基甲酸酯
在搅拌和氮气流下,向在0℃下冷却的0.124g(0.30mmol)N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酸在6ml甲苯中的溶液中加入0.102g(0.14mmol)7-TES-14β-氨基-浆果赤霉素III 14,1-氨基甲酸酯、0.06g(0.30mmol)二环己基碳二亚胺(DCC)、0.02g(0.15mmol)二甲氨基吡啶(DMAP)和0.005g(0.03mmol)对甲苯磺酸(PTSA)。在70℃下2小时后,再加入0.045g(0.11mmol)N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酸和0.022g(0.11mmol)DCC。再过3小时后,将反应冷却并过滤。将固体用二氯甲烷洗涤3次;然后将合并的有机相在减压下浓缩。将反应混合物进行色谱分离(SiO2,正己烷/EtOAc/CH2Cl2,1.0∶0.6∶0.6),得到0.136g(0.12mmol,86%)标题产物。IR(KBr,cm-1):3435,2956,1735,1454,1369,1235;1H-NMR(CDCl3,400MHz)相关共振:δ=0.58(m,6H,3CH2),0.93(m,9H,3Me),1.75(s,3H,Me),2.19(s,3H,Me),2.26(s,3H,Me),2.52(m,1H,Hα-6,J1=6.4Hz,J2=10.0Hz,J3=14.4Hz),3.87(s,3H,OMe),3.88(s,3H,OMe),4.22(d,1H,H-20,J=7.6Hz),4.26(d,1H,H-20),4.90(m,1H,H-5,J=7.2Hz),6.05(d,1H,H-2,J=7.2Hz),7.40-7.44(m,2H,芳族),7.56-7.60(m 1H,芳族),7.98-7.99(d,2H,芳族)。C59H80N2O18Si的分析计算值:C,62.53;H,7.11。实测值:C,63.3;H,6.99。
实施例15
13-(N-Boc-β-异丁基异丝氨酰基)-14β-氨基-浆果赤霉素III 14,1-氨基甲酸酯
在0℃下,向0.114g(0.10mmol)13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-14β-氨基-7-TES-浆果赤霉素III 14,1-氨基甲酸酯在1.6ml二氯甲烷中的溶液中加入1.02ml 0.01M乙酰氯的甲醇溶液。在5℃下24小时后,通过加入7ml NH4Cl饱和水溶液使反应混合物停止反应并用10ml AcOEt萃取。然后将合并的有机相干燥并在减压下浓缩。进行色谱纯化(SiO2,正己烷/EtOAc/Et2O 1∶0.7∶0.3),得到0.06g(0.061mmol,66%)标题化合物。1H-NMR(CDCl3,400MHz):δ=0.97(t,6H,2Me),1.25-1.31(b,8H,2Me和H-4′的2H),1.37(s,9H,3Me),1.69-1.72(s,4H,Me,H-5′),1.78-1.96(m,4H,Hβ-6,Me),2.25(s,3H,Me),2.33(s,3H,Me),2.55(m,1H,Hα-6),3.05(d,1H,OH,J=6.4Hz),3.76(d,1H,H-3,J=7.2Hz),4.15-4.22(m,3H,H-14,H-2′,H3′),4.28(d,1H,H-20),4.35(d,1H,H-20),4.38(m,1H,H-7),4.73(d,1H,N′-H,J=9.6Hz),4.94(m,1H,H-5,J1=0.8Hz,J2=7.6Hz),6.02(d,1H,H-2,J=7.6Hz),6.11(d,1H,H-13,J=6.8Hz,J=1.6Hz),6.26(s,1H,H-10),7.42-7.45(m,2H,芳族),7.54-7.58(m 1H,芳族),8.02-8.1(d,2H,芳族);13C-NMR(CDCl3,100MHz)相关共振:10.2,15.4,21.2,21.8,22.9,23.4,23.8,25.0,26.3,28.7,30.1,35.8,41.8,42.5,44.9,51.8,57.8,58.8,71.2,72.1,73.0,75.3,76.4,81.2,81.7,84.4,128.7,128.9,130.0,134.0,134.1,140.1,156.4,164.9,173.5,202.5;C44H58N2O16的分析计算值:C,60.68;H,6.71。实测值:C,61.2;H,6.99。
实施例16
13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-7-TES-14β-氨基-浆果赤霉素III
向0.052g(0.05mmol)13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-14β-叠氮基-7-TES-浆果赤霉素III在2.0ml MeOH中的溶液中加入催化量的披钯碳,然后向其中通入氢气。在室温下18小时后,将反应混合物通过硅藻土床过滤,并用6ml乙酸乙酯洗涤固体。将所得有机相加热至45℃达20分钟,然后在减压下蒸发。将残余物进行色谱分离(SiO2,正己烷/EtOAc/CH2Cl2 0.7∶0.3∶1.0),得到0.72g(0.064mmol,70%)标题产物。IR(KBr,cm-1):3449,2957,1726,1617,1368,1237,1105;1H-NMR(CDCl3,400MHz)相关共振:δ=0.58(m,6H,3CH2),0.94(m,9H,3Me),1.07(m,10H),1.72(s,3H,Me),2.12(s,3H,Me),2.18(s,3H,Me),2.30(s,3H,Me),2.51(m,1H,Hα-6),3.35(d,1H,J=8.8Hz),3.83(s,3H,OMe),3.88(s,3H,OMe),4.26(m,2H,2H-20),4.53(m,3H),4.93(d,1H,H-5),5.85(d,1H,H-2,J=7.2Hz),6.06(d,1H,H-13),6.45-6.51(m,3H),6.59(s,1H,H-10),7.42-7.45(m,2H,芳族),7.54-7.60(m 1H,芳族),8.00-8.02(d,2H,芳族)。C58H82N2O17Si的分析计算值:C,62.91;H,7.46。实测值:C,63.4;H,6.87。
实施例17
13-(N-Boc-β-异丁基异丝氨酰基)-14β-氨基-浆果赤霉素III
在0℃下,向0.107g(0.09mmol)13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-7-TES-14β-氨基-浆果赤霉素III在2.7ml乙腈和2.7ml吡啶中的溶液中加入10.7mL(0.1mL/10mg底物)氢氟酸-吡啶。半小时后,使温度升高至25℃。3小时后,通过加入6ml NH4Cl饱和水溶液使反应停止并用8ml AcOEt萃取3次。将有机相用CuSO4饱和水溶液洗涤3次、干燥、过滤并在减压下蒸发。将所得反应粗品溶解在3.5ml二氯甲烷中,然后在0℃下加入1.15ml 0.1M乙酰氯在MeOH中的溶液。3小时后,通过加入5ml NH4Cl饱和水溶液使反应停止并用8ml AcOEt萃取。将有机相干燥、过滤并在减压下蒸发。进行色谱分离(SiO2,正己烷/EtOAc,1.0∶1.2),得到0.05g(0.06mmol,70%)标题产物。1H-NMR(CDCl3,400MHz):δ=1.00(m,6H,2Me),1.14(s,3H,Me),1.19(s,3H,Me),1.32(s,9H,3Me),1.62-1.78(s,4H,Me,H-5′),1.84-1.94(m,4H,Hβ-6,Me),2.24(s,3H,Me),2.39(s,3H,Me),2.55(m,1H,Hα-6,J1=6.4Hz,J2=9.6Hz,J3=14.8Hz),3.09(b,1H,OH),3.35(d,1H,J=9.2Hz),3.74(d,1H,J=7.2Hz),4.18-4.33(m,4H,H-2′,H3′,2H-20),4.41(m,1H,H-7),4.70(d,1H,N′-H,J=9.6Hz),4.95(m,1H,H-5,J1=2Hz,J2=9.6Hz),5.81(d,1H,H-2,J=7.6Hz),5.90(d,1H,H-13,J=9.2Hz,J=1.2Hz),6.27(s,1H,H-10),7.42-7.46(m,2H,芳族),7.52-7.61(m 1H,芳族),8.0-8.06(d,2H,芳族);13C-NMR(CDCl3,100MHz):10.1,15.3,21.3,22.3,23.0,23.7,24.4,25.1,26.8,28.6,30.1,35.8,42.2,43.3,45.0,51.4,53.5,58.7,72.3,72.9,75.1,75.3,75.7,80.6,81.5,84.5,128.8,129.8,130.0,133.4,135.0,138.8,156.1,165.6,169.8,171.4,203.3,MS(mz)(M+C43H60N2O15的计算值844.4),845.4,789.5,C43H60N2O15的分析计算值:C,61.12;H,7.16。实测值:C,62.3;H,6.99。
实施例18
13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-7-TES-14β-叔丁氧基氨基甲酰基-浆果赤霉素III 14,1-氨基甲酸酯
在室温下,向0.11g(0.10mmol)13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-7-TES-14β-氨基-浆果赤霉素III在3ml二氯甲烷中的溶液中加入0.04g(0.20mmol)BOC2O、0.03mL(0.21mmol)三乙胺和0.006g(0.05mmol)二甲氨基吡啶。3小时后,通过加入4ml NH4Cl饱和水溶液使反应停止并用6ml二氯甲烷萃取3次。将有机相干燥、过滤并在减压下蒸发。进行色谱分离(SiO2,正己烷/EtOAc/CHCl3,8.0∶3.0∶5.0),得到0.09g(0.06mmol,69%)标题产物。IR(KBr,cm-1):3450,2961,1803,1733,1370,1239,1089;1H-NMR(CDCl3,400MHz)相关共振:δ=0.59(m,6H,3CH2),0.94(m,9H,3Me),1.37(s,9H),1.72(s,3H,Me),2.19(s,3H,Me),2.23(s,3H,Me),2.46(s,3H,Me),2.52(m,1H,Hα-6),3.82(s,3H,OMe),3.88(s,3H,OMe),4.18(d,1H,H-20,J=8Hz),4.24(d,1H,H-20,J=8Hz),4.56(m,3H),4.76(d,1H,J=7.2Hz),4.93(d,1H,H-5),6.01(d,1H,H-2,J=7.2Hz),6.36(s,1H,H-10),6.42(d,1H),6.47-6.51(m,3H),7.32-7.42(m,2H,芳族),7.51-7.58(m 1H,芳族),7.92-7.98(d,2H,芳族);13C-NMR(CDCl3,100MHz)相关共振:5.7,7.2,10.7,15.5,21.2,22.2,22.4,22.9,23.7,26.7,28.1,28.6,37.4,42.1,43.7,46.3,55.5,55.7,58.7,59.8,71.3,72.1,74.1,74.7,76.2,80.2,84.4,84.8,104.5,128.5,129.0,129.9,133.9,134.1,139.5,150.4,151.2,159.2,164.6,171.0,200.7;C64H94N2O19Si的分析计算值:C,62.8;H,7.74。实测值:C,61.3;H,6.64。
实施例19
13-(N-Boc-β-异丁基异丝氨酰基)-14β-叔丁氧基氨基甲酰基-浆果赤霉素III14,1-氨基甲酸酯
在0℃下,向0.08g(0.07mmol)13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-7-TES-14β-叔丁氧基氨基甲酰基-浆果赤霉素III14,1-氨基甲酸酯在2.1ml乙腈和2.1ml吡啶中的溶液中加入0.8mL(0.1mL/10mg底物)氢氟酸-吡啶。半小时后,使温度升高至25℃。3小时后,通过加入6ml NH4Cl饱和水溶液使反应停止并用7ml AcOEt萃取3次。将有机相用CuSO4饱和水溶液洗涤3次、干燥、过滤并在减压下蒸发。将所得反应粗品溶解在3ml二氯甲烷中,然后在0℃下加入0.82ml 0.1M乙酰氯在MeOH中的溶液。3小时后,通过加入7ml NH4Cl饱和水溶液使反应停止并用8ml AcOEt萃取。将有机相干燥、过滤并在减压下蒸发。将所得混合物进行色谱分离(SiO2,正己烷/EtOAc,1.0∶1.2),得到0.03g(0.06mmol,46%)标题产物。IR(KBr,cm-1):3450,2961,1803,1733,1506,1370,1239,1089,732;1H-NMR(CDCl3,400MHz)相关共振:δ=0.98(m,6H,2Me),1.28(s,3H,Me),1.31(s,3H,Me),1.38(s,9H,3Me),1.43(s,9H,3Me),1.66(m,1H,H-5′),1.72(s,3H,Me),1.91(m,4H,Hβ-6,Me),2.25(s,3H,Me),2.53(m,4H,Me,Hα-6),3.82(d,1H,H-3,J=7.2Hz),3.95(b,1H,OH),4.07(m,1H,H-3′),4.25(m,3H,2H-20,H-2′),4.42(m,H,H-7),4.74(d,1H,H-14,J=7.6Hz),4.89(d,1H,N-H,J=8.8Hz),4.96(m,1H,H-5,J2=7.6Hz),6.01(d,1H,H-2,J=7.2Hz),6.26(m,2H,H-10,H-13),7.38-7.42(m,2H,芳族),7.54-7.58(m 1H,芳族),7.95-7.97(d,2H,芳族);13C-NMR(CDCl3,100MHz):10.2,16.0,21.2,22.6,23.3,23.5,25.3,27.0,28.1,28.7,35.9,42.0,45.2,51.6,58.9,59.5,71.2,72.1,74.2,75.3,76.3,80.7,84.6,85.4,128.4,129.0,129.9,133.3,134.0,141.4,150.2,155.9,164.4,169.5,171.0,171.2,172.1,202.5;C48H68N2O17的分析计算值:C,61.00;H,7.25。实测值:C,61.3;H,6.64。
实施例20
13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-7-TES-14β-氨基-浆果赤霉素III 14,1-硫代氨基甲酸酯
在室温下,向0.171g(0.15mmol)13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-7-TES-14β-氨基-浆果赤霉素III在7ml乙腈中的溶液中加入0.14g(0.61mmol)硫代碳酸二-2-吡啶基酯。2小时后,通过加入4ml水使反应混合物停止反应并用6ml二氯甲烷萃取3次。将有机相干燥、过滤并在减压下蒸发。将残余物进行色谱分离(SiO2,正己烷/EtOAc/CH2Cl2,7.0∶5.0∶8.0),得到0.13g(0.11mmol,69%)标题产物。IR(KBr,cm-1):3446,2958,1732,1694,1595,1278,1167;1H-NMR(CDCl3,400MHz,55℃)相关共振:δ=0.60(m,6H,2CH3),0.95(m,9H,3Me),1.08(m,6H),1.18-1.48(m,18H),1.73(s,3H,Me),2.13(s,3H,Me),2.19(s,3H,Me),2.23(s,3H,Me),2.51(m,1H,Hα-6,J1=6.6Hz,J2=9.7Hz,J3=14.3Hz),3.78(d,1H,H-14,J1=7.4Hz),3.82(s,3H,OMe),3.87(s,3H,OMe),4.23-4.29(m,3H,H-3,2H-20,J=7.2Hz),4.44(m,2H,H-7,H-3′),4.90(m,1H,H-5,J=9.8Hz),6.09(d,1H,H-13,J=7.1Hz),6.13(d,1H,H-2,J=7.2Hz),6.48(m,4H,芳族),7.37-7.41(m,2H,芳族),7.54-7.57(m 1H,芳族),7.96-7.98(d,2H,芳族);13C-NMR(CDCl3,100MHz):5.69,7.17,10.7,15.0,21.1,22.3,22.6,22.8,25.7,26.2,28.5,37.3,42.7,46.4,55.6,55.7,58.8,62.8,70.6,72.1,74.6,75.7,76.2,80.7,84.3,86.9,98.7,104.3,128.8,128.8,129.1,129.9,133.8,134.7,137.9,159.0,161.6,164.8,169.2,169.9,171.5,187.9,200.4;C60H84N2O17SSi的分析计算值:C,61.83;H,7.26。实测值:C,61.2;H,7.3。
实施例21
13-(N-Boc-β-异丁基异丝氨酰基)-14β-氨基-浆果赤霉素III 14,1-硫代氨基甲酸酯
在0℃下,向0.11g(0.10mmol)13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-7-TES-14β-氨基-浆果赤霉素III 14,1-硫代氨基甲酸酯在2.7ml乙腈和2.7ml吡啶中的溶液中加入1.1mL氢氟酸-吡啶。半小时后,使温度升高至25℃。2小时后,通过加入6ml NH4Cl饱和水溶液使反应停止并用11ml AcOEt萃取3次。将有机相用CuSO4饱和水溶液洗涤3次、干燥、过滤并在减压下蒸发。在0℃下,向所得反应粗品(溶解在4ml二氯甲烷中)中加入1.2ml 0.1M乙酰氯在MeOH中的溶液。3小时后,通过加入7ml NH4Cl饱和水溶液使反应停止并用8ml AcOEt萃取。将有机相干燥、过滤并在减压下蒸发。将残余物进行色谱分离(SiO2,EtOAc/正己烷,1.4∶1),得到0.03g(0.05mmol,62%)标题产物。IR(KBr,cm-1):3343,2960,1735,1686,1514,1239,1088,733;1H-NMR(CDCl3,400MHz):δ=0.99(m,6H,2Me),1.29(s,3H,Me),1.41(s,9H,3Me),1.73(s,3H,Me),1.74-1.94(m,10H,Hβ-6,H-5′,H-4′,2Me),2.24(s,3H,Me),2.31(s,3H,Me),2.48(m,1H,Hα-6,J1=6.4Hz,J2=9.0Hz,J3=15.0Hz),3.72(d,1H,H-3,J=7.2Hz),4.10-4.18(m,2H,H-2′,H3′),4.28(m,2H,H-20),4.36(m,2H,H-7,H-20),4.78(d,1H,N′-H,J=9.2Hz),4.94(m,1H,H-5,J1=2.4Hz,J2=9.6Hz),6.09(d,2H,H-2,H-13,J=7.6Hz),6.26(s,1H,H-10),7.40-7.45(m,2H,芳族),7.49-7.52(m 1H,芳族),7.99-8.01(d,2H,芳族),9.33(s,1H,NH);13C-NMR(CDCl3,100MHz):10.2,15.3,21.2,21.9,23.1,23.7,25.0,26.2,28.7,35.9,41.6,42.7,45.3,52.0,58.9,62.0,70.7,72.0,72.8,75.3,76.4,76.7,81.2,82.1,84.4,94.8,128.8,129.8,130.0,133.9,134.1,139.9,156.2,164.8,169.5,171.0,173.5,202.3;C44H58N2O15S的分析计算值:C,59.58;H,6.59。实测值:C,61.3;H,6.64。
实施例22
7-TES-14-(Boc)-三氮烯基-13-酮基浆果赤霉素III
在-75℃、氮气流和剧烈搅拌下,将(0.06g,0.52mmol)叔丁醇钾混悬在1.5mL无水THF中。10分钟后,在相同温度下于3分钟内加入0.13g(0.19mmol)7-TES-13-酮基浆果赤霉素III在1.0ml THF和0.7ml DMPU中的溶液。15分钟后,在-70℃下、于2分钟内加入0.06g(0.41mmol)溶解在1ml THF中的叔丁氧羰基叠氮。2小时后,并且在温度升高至-50℃后,通过加入5.0ml NH4Cl饱和水溶液使反应停止。使温度缓慢升高至20℃,并用3.0ml Et2O稀释反应混合物并用6.0ml NH4Cl饱和水溶液萃取。将有机相用水洗涤3次、干燥、过滤并在减压下蒸发。将残余物进行色谱分离(SiO2,正己烷/EtOAc,2.3∶1.0),得到0.022g(0.26mmol,50%)标题产物。IR(KBr,cm-1):3500-3100,2962,1731,1374,1238;1H-NMR(CDCl3,400MHz):1H-NMR(CDCl3,400MHz):相关共振δ=0.58(m,6H,3CH2),0.91(m,9H,3Me),1.11(s,3H,Me),1.31(s,3H,Me),1.55(s,9H,3Me),1.71(s,3H,Me),1.88(m,1H,Hβ-6),2.20(s,3H,Me),2.21(s,3H,Me),2.22(s,3H,Me),2.52(m,1H,Hα-6),3.91(d,1H,H-3),4.23(s,2H,2H-20),4.47(m,2H,H-7,H-14),4.92(d,1H,H-5),5.80(d,1H,CH2),6.54(s,1H,H-10),6.89(S,1H),7.38-7.60(m,4H,芳族),7.96-7.99(m,2H,芳族);13C-NMR(CDCl3,100MHz):δ=5.5,7.0,10.0,14.3,19.2,21.0,22.0,28.3,33.8,37.3,43.1,45.1,59.3,72.5,73.5,73.9,75.6,76.4,76.7,80.8,83.3,84.0,128.9,129.0,129.2,130.3,130.4,133.7,138.6,150.4,152.1,165.7,169.2,171.0,194.7,200.3;MS(mz)(M+C42H59N3O13Si的计算值841.4),842.4,714,652,574;C42H59N3O13Si的分析计算值:C,59.91;H,7.06。实测值:C,58.9;H,6.57。
实施例23
14-[N,N′-双-(苄氧羰基)肼基]-7-Boc-13-酮基浆果赤霉素III
在氮气流和剧烈搅拌下,将0.16g(1.47mmol)叔丁醇钾混悬在-72℃的3.0ml无水THF中。在2分钟内并于相同温度下,向该混合物中加入0.37g(0.54mmol)在2.5ml THF和1.8ml DMPU中的7-Boc-13-酮基浆果赤霉素III。15分钟后,在-68℃下,缓慢加入0.32g(1.19mmol)溶解在3.0ml THF和0.2ml DMPU中的偶氮二甲酸二苄酯。使温度升高至-50℃,8小时后,通过加入2mL(0.03mmol)用10ml乙醚稀释的乙酸使反应停止并用10mlNH4Cl饱和水溶液萃取。将有机相用水洗涤3次、干燥、过滤并在减压下蒸发。将残余物进行色谱分离(SiO2,正己烷/EtOAc,1.3∶5.0),得到0.30g(0.29mmol,55%)标题产物。1H-NMR(CDCl3,400MHz):δ=0.86(s,3H,Me),1.23(s,3H,Me),1.47(s,9H,3Me),1.82(s,3H,Me),1.97(m,1H,Hβ-6,J1=2.5Hz,J2=10.9Hz,J3=14.3Hz),2.13(s,3H,Me),2.18(s,3H,Me),2.19(s,3H,Me),2.59(m,1H,Hα-6,J1=7.2Hz,J2=9.5Hz,J3=14.3Hz),4.14(d,1H,H-3,6.2Hz),4.24(d,1H,H-20,J=8.6Hz),4.37(d,1H,H-20,J=8.6Hz),4.90(s,1H,H-14),4.92(d,1H,H-5,J1=2.5Hz,J2=9.5Hz),4.99(d,1H,CH2,J=12.5Hz),5.06(d,1H,CH2,J=12.5Hz),5.12(d,1H,CH2,J=12.5Hz),5.18(d,1H,CH2,J=12.5Hz),5.41(m,1H,H-7,J1=10.8Hz,J2=6.9Hz),5.62(s,1H),5.97(d,1H,H-2,J=6.2Hz),6.56(s,1H,H-10),6.89(s,1H),7.15-7.30(m,10H,芳族),7.34-7.40(m,2H,芳族),7.50-7.55(m 1H,芳族),8.25(d,2H,芳族);13C-NMR(CDCl3,100MHz):δ=10.9,14.4,20.1,21.0,22.0,27.9,33.6,43.5,45.9,57.2,66.1,68.8,69.5,73.6,74.4,75.2,75.8,76.8,80.9,83.3,84.2,127.5,128.3,128.5,128.6,128.7,128.8,128.9,129.2,131.1,133.6,135.0,135.3,138.4,152.6,153.3,157.0,158.0,166.2,168.4,171.7,196.4,200.2;C52H58N2O17的分析计算值:C,63.53;H,5.95。实测值:C,62.5;H,6.02。
实施例24
14-[N,N′-双-(Boc)肼基]-7-Boc-13-酮基浆果赤霉素III
在氮气流和剧烈搅拌下,将0.16g叔丁醇钾(1.47mmol)混悬在-72℃的3.0ml无水THF中。在2分钟内并在相同温度下,向混合物中加入0.37g(0.54mmol)在2.5ml THF和1.8ml DMPU中的7-Boc-13-酮基浆果赤霉素III。15分钟后,在-68℃下缓慢加入0.27g(1.19mmol)溶解在3.0ml THF和0.2ml DMPU中的偶氮二甲酸二叔丁酯。1小时后,通过加入2mL(0.03mmol)用10ml乙醚稀释的乙酸使反应停止并用NH4Cl饱和水溶液萃取。将有机相用水洗涤3次、干燥、过滤并在减压下蒸发。将残余物进行色谱分离(SiO2,正己烷/EtOAc,1.3∶5.0),得到0.35g(0.37mmol,70%)标题产物。1H-NMR(CDCl3,400MHz):δ=1.00(s,3H,Me),1.26(s,3H,Me),1.35(s,9H,3Me),1.40(s,9H,3Me),1.46(s,9H,3Me),1.82(s,3H,Me),1.97(m,1H,Hβ-6,J1=2.6Hz,J2=10.7Hz,J3=14.3Hz),2.17(s,3H,Me),2.18(s,3H,Me),2.21(s,3H,Me),2.59(m,1H,Hα-6,J1=7.0Hz,J2=9.7Hz,J3=14.3Hz),4.15(d,1H,H-3,6.3Hz),4.23(d,1H,H-20,J=8.4Hz),4.35(d,1H,H-20,J=8.4Hz),4.90(d,1H,H-5,J1=2.2Hz,J2=9.7Hz),5.14(s,1H,H-14),5.41(m,1H,H-7,J1=10.7Hz,J2=6.9Hz),5.58(s,1H),5.97(d,1H,H-2,J=6.4Hz),6.53(s,1H,H-10),6.58(s,1H),7.38-7.42(m,2H,芳族),7.50-7.55(m 1H,芳族),8.29(d,2H,芳族);13C-NMR(CDCl3,100MHz):δ=10.9,14.3,20.1,21.0,21.9,27.9,28.1,28.2,33.7,34.6,43.6,45.9,57.3,65.1,73.4,74.5,75.0,76.1,76.8,80.9,82.7,83.2,83.3,84.2,128.4,129.4,131.2,133.3,138.5,152.6,153.2,155.8,157.3,166.2,168.4,171.7,196.9,200.4;C46H62N2O19的分析计算值:C,58.34;H,6.60。实测值:C,60.3;H,6.64。
实施例25
13-酮基浆果赤霉素III 13,14-三异丙基甲硅烷基烯醇醚
在-75℃、搅拌和氮气流下,向0.07g(0.10mmol)7-TES-13-酮基浆果赤霉素III在2ml无水THF中的溶液中加入0.25mL(0.25mmol)1.0M的叔丁醇钾溶液。12分钟后,在相同温度下用注射器非常缓慢地加入0.04mL(0.17mmol)三异丙基氯硅烷。45分钟后,通过加入7mL NH4Cl饱和水溶液使反应停止并用15.0ml Et2O萃取3次。将有机相用水洗涤4次、干燥、过滤并在减压下蒸发。将残余物进行色谱分离(SiO2,正己烷/EtOAc/Et2O,1.8∶0.7∶0.5),得到0.035g(0.04mmol,43%)标题化合物。IR(KBr,cm-1):3474,2948,1725,1369,1239,1108,732;1H-NMR(CDCl3,400MHz):δ=0.58(m,6H,3CH2),0.92(m,9H,3Me),1.05(s,3H,Me),1.14(m,18H,6Me),1.25(s,3H,Me),1.70(s,3H,Me),1.88(m,1H,Hβ-6,J1=1.2Hz,J2=11.2Hz,J3=14Hz),2.10(s,3H,Me),2.19(m,3H,Me),2.23(s,3H,Me),2.50(m,1H,Hα-6,J1=1.2Hz,J2=9.5Hz,J3=14.0Hz),3.74(d,1H,H-3,J=7.6Hz),4.16(d,1H,H-20,J=8.4Hz),4.27(d,1H,H-20,J=8.4Hz),4.46(m,1H,H-7,J1=6.4Hz,J2=11.2Hz),4.82(s,1H,H-14),4.94(d,1H,H-5,J1=1.2Hz,J2=8Hz),5.76(d,1H,H-2,J=7.2Hz),6.40(s,1H,H-10),7.43-7.47(m,2H,芳族),7.57-7.60(m 1H,芳族),8.07-8.09(d,2H,芳族);13C-NMR(CDCl3,100MHz):δ=5.71,7.2,10.7,13.0,14.2,18.1,18.4,18.5,19.8,21.4,22.3,28.5,30.1,37.5,41.0,45.6,58.4,72.2,74.2,76.2,75.5,80.8,81.9,84.4,110.6,128.7,129.7,130.2,133.6,134.7,137.8,153.5,166.7,169.3,170.0,201.7。MS(mz)(M+C47H72O10Si2的计算值854.5),855.5,795.5,735.5,673.4;C47H72O10Si2的分析计算值:C,66.16;H,8.51。实测值:C,67.5;H,8.64。
实施例26
7-TES-13-酮基浆果赤霉素III 13,14-二乙基磷酸烯醇化物(diethtylphospho-enolate)
在氮气和-78℃下,向7-TES-13-酮基浆果赤霉素III(258mg,M.W.=698g/mol,0.37mmol)在无水THF(7.5ml)中的溶液中逐滴加入0.5MKHMDS(1.7ml,0.85mmol,2.3当量)在甲苯中的溶液。在-78℃下搅拌1小时后,向其中加入氯代膦酸二乙酯(80μl,M.W.=172.55g/mol,0.55mmol,1.2g/ml,1.5当量)。将混合物在-78℃下搅拌30分钟、在0℃下搅拌1.5小时,并在室温下过夜,然后加入水(15ml)并用AcOEt(3×15ml)萃取。将粗品(300mg)用快速硅胶色谱法(AcOEt/己烷1∶1)纯化,得到所需产物(150mg,M.W.=834g/mol,0.18mmol),收率48%。TLC(AcOEt∶己烷1∶1)Rf=0.26。
实施例27
7-Boc-13-酮基浆果赤霉素III 13,14-Boc-烯醇酯
在搅拌下,向13-酮基浆果赤霉素III(0.525g,0.9mmol)和DMAP(9mg,70mmol)在二氯甲烷(5.0ml)中的溶液中加入Boc酸酐(0.236g,1.10mmol)。将该溶液在室温下搅拌过夜。减压除去溶剂,将油状残余物溶解在50%含水丙酮(10ml)中并将其搅拌1小时。用二氯甲烷萃取溶液,将合并的有机相用硫酸钠干燥,然后蒸发。将残余物在硅胶上进行色谱分离,得到0.36g标题产物(0.52mmol,58%)、80mg未反应的产物和50mg 7-Boc-13-酮基浆果赤霉素III。
[α]D 20=-35.6°(c 1.05,CHCl3);IR(CDCl3,cm-1):3483,1731,1676,1371,1274;1H-NMR(CDCl3,400MHz):δ=1.20(s,3H,Me),1.22(s,3H,Me),1.47(s,9H,3Me),1.76(s,3H,Me),1.91(m,1H,H?-6,J1=10.4Hz,J2=14.8Hz,J3=2.0Hz),1.92(b,1H,OH),2.17(s,3H,Me),2.19(s,3H,Me),2.20(s,3H,Me),2.64(m,1H,H?-6,J1=7.2Hz,J2=14.8Hz,J3=9.5Hz),2.66(d,1H,H-14,J=19.6Hz),2.94(d,1H,H-14,J=19.6Hz),4.02(d,1H,H-3,J=6.8Hz),4.09(d,1H,H-20,J=9.0Hz),4.32(d,1H,H-20,J=9.0Hz),4.94(d,1H,H-5,J1=9.5Hz,J2=2.0Hz),5.39(m,1H,H-7,J1=10.4Hz,J2=7.2Hz),5.67(d,1H,H-2,J=6.8Hz),6.57(s,1H,H-10),7.44-7.50(m,2H,芳族),7.61-7.64(m 1H,芳族),8.30(d,2H,芳族);13C-NMR(CDCl3,100MHz):δ=10.7,14.0,18.4,21.0,21.9,27.9,33.1,33.6,42.7,46.7,57.3,72.8,74.7,76.3,76.5,77.4,78.7,80.5,83.4,84.0,128.9,129.0,130.3,134.3,141.0,152.4,152.5,167.0,168.3,170.3,198.4,200.5。C36H44O13的分析计算值:C,63.15;H,6.48。实测值:C,63.39;H,6.60。
实施例28
7-TES-13-酮基-14-(N,N′-双-(苄氧羰基)肼基)-浆果赤霉素III
在氮气下将搅拌下的13-酮基-7-TES-浆果赤霉素III(450mg,0.64mmo1)在无水THF(12ml)和DMPU(2.5ml)中的溶液冷却至-70℃,然后逐滴加入叔丁醇钾(1.61mL,1M在THF中,1.61mmol)。将该溶液在-65℃下搅拌45分钟,然后加入偶氮二甲酸二苄酯(276mg,90%,0.82mmol),用TLC检测反应情况:2小时后转化仍不完全,因此再加入偶氮二甲酸二苄酯(69mg,0.20mmol)。1小时后,将反应用乙酸(0.15mL,40%在THF中)处理,并使其在室温下温热,然后用NaCl饱和水溶液(10ml)稀释并用AcOEt(2×10ml)萃取。将有机相用NaCl饱和水溶液(10ml)洗涤、干燥(Na2SO4)并蒸发。将残余物用柱色谱法(硅胶,1→2%AcOEt在CH2Cl2中)纯化,得到标题产物(451mg,70%)和13-酮基-7-TES-浆果赤霉素III(45mg,10%)。Rf=0.6(硅胶,50%AcOEt的环己烷溶液);m.p.181-182℃(Et2O/EtP);1H-NMR(200MHz,CDCl3)δ8.29(d,J=7.0Hz,2H,Bz),7.19-7.55(m,13H,Bz,Ar),6.87(s,1H,NH),6.53(s,1H,10-H),5.99(d,J=6.6Hz,1H,2-H),5.63(s,1H,14-H),5.16(d,J=3.3Hz,2H,CH2Ph),5.04(d,J=4.8Hz,2H,CH2Ph),4.88(d,J=4.0Hz,1H,5-H),4.51(dd,J=6.6,4.0Hz,1H,7-H),4.32(Abq,2H,20-H),4.01(d,J=6.6Hz,1H,3-H),2.42-2.61(m,1H,6-H),2.23(s,3H,4-OAc),2.22(s,3H,10-OAc),2.15(s,3H;18-Me),1.84-1.98(m,1H,6-H),1.74(s,3H,19-Me),1.29(s,3H,16-Me),1.28(s,3H,17-Me),0.90-0.98(t,J=8.7Hz,9H,Si(CH2CH3)3),0.58-0.66(m,6H,Si(CH2CH3)3);13C-NMR(300MHz,CDCl3)δ200.1,196.7,171.9,169.3,166.3,158.1,157.1,138.0,135.5,135.2,133.6,131.3,129.5,129.0,128.9,128.7,128.5,127.7,84.6,81.3,75.8,75.3,74.0,72.5,69.6,68.9,66.3,59.6,46.0,43.7,37.6,34.8,22.2,21.1,20.2,14.2,10.2,7.1,5.6。
实施例29
7-TES-13-酮基-14-肼基-浆果赤霉素III
将13-酮基-7-TES-14-(N,N′-双-(苄氧羰基)-肼基)-浆果赤霉素III(564mg,0.55mmol)在AcOEt(45ml)中的溶液用10%Pd/C作为催化剂(557mg)氢化45分钟。用硅藻土滤除催化剂,然后在不加热条件下减压蒸除溶剂,得到标题产物(386mg,96%)。该化合物在多种条件(色谱柱)下和多种溶剂(CDCl3)中不稳定。Rf=0.2(硅胶,5%在CH2Cl2中的AcOEt);1H-NMR(200MHz,CDCl3)δ8.21(d,J=7.3Hz,2H,Bz),7.41-7.61(m,3H,Bz),6.54(s,1H,10-H),5.85(d,J=6.6Hz,1H,2-H),5.37(s,1H),5.18(s,1H),4.92(d,J=8.1Hz,1H,H-5),4.51(dd,J=6.6,4.1Hz,1H,H-7),4.29(s,2H,H-20),3.92(d,J=7.0Hz,1H,H-3),2.47-2.62(m,1H,H-6),2.25(s,3H,4-OAc),2.23(s,3H,10-OAc),2.06(s,3H;18-Me),1.84-1.98(m,1H,6-H),1.74(s,3H,19-Me),1.31(s,3H,16-Me),1.28(s,3H,17-Me),0.90-0.98(t,J=8.7Hz,9H,Si(CH2CH3)3),0.58-0.66(m,6H,Si(CH2CH3)3)。
实施例30
7-TES-13-酮基-浆果赤霉素III[14,1-d]-3,4-脱氢呋喃-2-酮
在氮气下,将搅拌下的13-酮基-7-TES-浆果赤霉素(600mg,0.86mmol)在无水THF(20ml)中的溶液冷却至-70℃,然后逐滴加入叔丁醇钾(2.16mL,1M在THF中,2.16mmol)并在-65℃下搅拌45分钟。然后,加入乙醛酸乙酯(0.36mL,50%在甲苯中,1.29mmol),用TLC检测反应情况:2小时后转化仍不完全,因此再加入偶氮二甲酸二苄酯(0.12ml,0.43mmol)。1小时后,将反应用无水柠檬酸(290mg)处理并使其在室温下温热,然后立即用柱色谱法(硅胶,10→20%AcOEt的环己烷溶液)纯化,得到标题产物(503mg,79%),为黄色固体。Rf=0.55(硅胶,50%AcOEt的环己烷溶液);m.p.252-253℃(Et2O/Etp);1H-NMR(200MHz,CDCl3)δ7.97(d,J=8.4Hz,2H,Bz),7.43-7.62(m,3H,Bz),6.87(s,1H,21-H),6.66(s,1H,10-H),6.16(d,J=6.9Hz,1H,2-H),4.88(d,J=8.8Hz,1H,5-H),4.50(dd,J=6.6,3.6Hz,1H,7-H),4.13-4.24(Abq,2H,20-H),3.98(d,J=6.9Hz,1H,3-H),2.49-2.64(m,1H,6-H),2.39(s,3H,4-OAc),2.27(s,3H,10-OAc),2.14(s,3H;18-Me),1.84-1.98(m,1H,6-H),1.75(s,3H,19-Me),1.45(s,3H,16-Me),1.27(s,3H,17-Me),0.91-0.99(t,J=8.4Hz,9H,Si(CH2CH3)3),0.56-0.68(m,6H,Si(CH2CH3)3);13C(300MHz,CDCl3)δ199.4,182.9,171.0,169.5,165.2,158.7,156.3,143.1,134.7,130.5,129.4,128.7,127.4,94.3,84.4,77.3,77.1,76.4,72.8,68.6,60.8,47.3,45.2,32.9,22.3,21.4,20.8,14.6,10.3,7.4,5.3;[α]20 D+72(c 1,CHCl3)。
实施例31
7-TES-13,14-脱氢-浆果赤霉素III[14,1-d]-呋喃-2-酮
将13-酮基-7-TES-浆果赤霉素[14,1-d]-脱氢呋喃-2-酮衍生物(90mg,0.12mmol)在AcOEt(10ml)中的溶液用10%Pd/C作为催化剂(90mg)氢化45分钟。用硅藻土滤除催化剂,然后蒸除溶剂,将残余物用色谱柱(硅胶,20-50%AcOEt的环己烷溶液)纯化,得到标题产物(67mg,75%),为白色固体。Rf=0.2(硅胶,50%AcOEt的环己烷溶液);m.p.235-236℃(EtOAc/己烷);1H-NMR(200MHz,CDCl3)δ8.01(d,J=6.9Hz,2H,Bz),7.44-7.62(m,3H,Bz),6.43(s,1H,10-H),6.10(d,J=6.6Hz,1H,2-H),4.98(d,J=5.9Hz,1H,5-H),4.44(dd,J=6.6,3.6Hz,1H,7-H),4.17-4.39(Abq,2H,20-H),3.76(d,J=7.0Hz,1H,3-H),3.13-3.41(Abq,2H,21-H),2.49-2.64(m,1H,6-H),2.23(s,3H,4-OAc),2.22(s,3H,10-OAc),2.20(s,3H;18-Me),1.84-1.98(m,1H,6-H),1.74(s,3H,19-Me),1.27(s,3H,16-Me),1.16(s,3H,17-Me),0.90-0.98(t,J=8.1Hz,9H,Si(CH2CH3)3),0.56-0.68(m,6H,Si(CH2CH3)3);13C(300MHz,CDCl3)δ201.5,175.0,170.1,169.6,164.9,148.7,136.8,134.9,133.8,129.6,128.8,128.7,102.2,92.4,84.1,80.8,76.1,75.9,72.2,70.4,58.4,45.0,39.6,37.3,32.0,28.1,21.3,20.9,19.6,13.5,10.0,6.7,5.3。
实施例32
7-TES-浆果赤霉素[14,1-d]-3,4-脱氢呋喃-2-酮
将搅拌下的Bu4NBH4(180mg,0.7mmol)在MeOH(10ml)中的溶液冷却至-30℃,然后将其滴加至7-TES-13-酮基-浆果赤霉素[14,1-d]-3,4-脱氢呋喃-2-酮(200mg,0.28mmol)在THF(1mL)中的溶液中。30分钟后,用柠檬酸(180mg)处理反应混合物并使其在室温下温热。加入水(10mL)后,用AcOEt(2×10mL)萃取该混合物,将有机相用水(5ml)洗涤、用Na2SO4干燥并蒸发。将残余物用硅胶色谱法(20→30%AcOEt的环己烷溶液)纯化,得到7-TES-13,14-脱氢-浆果赤霉素[14,1-d]-呋喃-2-酮(103mg,52%)和标题产物(52mg,26%),为白色固体。
Rf=0.15(硅胶,50%AcOEt的环己烷溶液);1H-NMR(200MHz,CDCl3)δ8.02(d,J=6.9Hz,2H,Bz),7.40-7.63(m,3H,Bz),6.47(s,1H,21-H),6.25(s,1H,10-H),6.12(d,J=8.1Hz,1H,2-H),5.14(m,1H,13-H),4.92(d,J=8.1Hz,1H,5-H),4.55(dd,J=7.0,3.6Hz,1H,7-H),4.15-4.30(Abq,2H,20-H),4.07(d,J=8.0Hz,1H,3-H),2.49-2.56(m,1H,6-H),2.28(s,3H,4-OAc),2.22(s,3H,10-OAc),2.13(s,3H;18-Me),1.84-1.97(m,1H,6-H),1.80(s,3H,19-Me),1.35(s,3H,16-Me),1.27(s,3H,17-Me),0.90-0.99(t,J=8.1Hz,9H,Si(CH2CH3)3),0.58-0.65(m,6H,Si(CH2CH3)3)。
实施例33
13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-7-TES-浆果赤霉素[14,1-d]-3,4-脱氢呋喃-2-酮
N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酸的制备
将N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酸钠盐(72mg,0.168mmol)溶解在水(5mL)中并加入CH2Cl2(3mL)。向其中滴加NaHSO4水溶液(2M,0.15mL)以调节pH至3.0。搅拌若干分钟后,分离有机相,水相用CH2Cl2(2mL)萃取。将合并的有机相用水(5mL)和NaCl饱和溶液(5mL)洗涤、用Na2SO4干燥并蒸发,得到游离酸(68mg,100%),为白色固体。
酯化
将7-TES-13,14-脱氢-浆果赤霉素[14,1-d]-呋喃-2-酮(100mg,0.14mmol)混悬在甲苯(4mL)中并逐滴加入溶解在CH2Cl2(2mL)中的N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酸(68mg,0.168mmol),然后加入N,N-二甲氨基吡啶(DMAP)(7mg)和二环己基碳二亚胺(DCC)(35mg,0.168mmol)。将反应混合物在70℃下加热3小时,然后使其冷却并保持在室温下直至DCU完全沉淀。将沉淀滤出(DCU)并用甲苯(2×3mL)洗涤,然后用饱和NaHCO3(5mL)、再用0.4M HCl(10mL)洗涤沉淀以除去DMAP,最后用饱和NaHCO3(5mL)洗涤。将有机相用Na2SO4干燥并蒸发至干。将残余物用柱色谱法(20→30%AcOEt的环己烷溶液)纯化,得到含有标题产物的第一个级分(88mg,56%)。Rf=0.55(硅胶,20%AcOEt的环己烷溶液);m.p.150-153℃(iPR2O/EtP);1H-NMR(200MHz,CDCl3)δ7.97(d,J=7.0Hz,2H,Bz),7.42-7.60(m,3H,Bz),7.19-7.25(m,1H),6.68(s,1H,10-H),6.46-6.54(m,2H),6.03(s,1H),5.98(d,J=5.1Hz,1H,2-H),5.81(s,1H,),5.05-5.13(m,1H),4.91(d,J=7.0Hz,1H,5-H),4.42(m,1H,7-H),4.28(s,2H,20-H),3.95(d,J=5.5Hz,1H,3-H),3.89(s,3H,O-Me),3.85(s,3H,O-Me),2.81(s,1H,13-H),2.49-2.64(m,1H,6-H),2.34(s,3H,4-OAc),2.22(s,3H,10-OAc),2.08(s,3H;18-Me),1.84-1.98(m,1H,6-H),1.69(s,3H,19-Me),1.27(s,3H,16-Me),1.24(s,3H,17-Me),1.03-1.13(,9H,N-Boc),0.90-0.97(t,J=7.7Hz,9H,Si(CH2CH3)3),0.54-0.62(m,6H,Si(CH2CH3)3);13C(300MHz,CDCl3)δ203.5,170.6,170.2,168.8,164.5,161.7,159.1,155.7,139.0,138.5,133.9,130.0,129.6,129.0,128.7,128.3,127.8,118.8,104.3,98.6,90.0,87.0,84.3,81.3,80.8,79.5,75.0,73.6,72.9,72.1,67.7,60.1,58.9,56.9,55.4,50.9,50.1,45.4,43.7,39.3,38.3,37.4,29.7,29.1,28.2,26.9,25.5,22.8,22.6,22.5,21.1,19.8,15.9,9.5,6.8,5.6;[α]20 D+44(c 0.25,CHCl3)。
实施例34
13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-浆果赤霉素[14,1-d]-3,4-脱氢呋喃-2-酮
将13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-7-TES-浆果赤霉素[14,1-d]-3,4-脱氢呋喃-2-酮(63mg,0.056mmol)在乙腈(3mL)和吡啶(3mL)中的溶液在聚乙烯容器中进行搅拌并将其冷却至0℃。向其中缓慢加入HF-吡啶溶液(0.4mL),然后将该混合物放置在室温下温热并搅拌24小时,然后将其倒入冷水(10mL)中并用CH2Cl2(2×5mL)萃取。将有机相用2M NaHSO4洗涤至pH 2,然后用5%NaHCO3(5mL)洗涤,最后用NaCl饱和溶液(5mL)洗涤。将混合物用Na2SO4干燥并蒸除溶剂。将残余物用柱色谱法(25→35%AcOEt的环己烷溶液)纯化,得到标题产物(45mg,80%),为白色固体。Rf=0.3(硅胶,50%AcOEt的环己烷溶液);1H-NMR(200MHz,CDCl3)δ7.95(d,J=7.5Hz,2H,Bz),7.43-7.59(m,3H,Bz),7.22-7.27(m,1H,),6.66(s,1H,21-H),6.51-6.54(m,2H,),5.99(d,J=5.5Hz,1H,2-H),5.84(s,1H,),5.57(s,1H,10-H),5.05-5.13(m,1H,),4.90(d,J=7.0Hz,1H,5-H),4.70(=),4.42(m,1H,7-H),4.30-4.32(ABq,2H,20-H),3.89(s,3H,O-Me),3.86(d,J=5.5Hz,1H,3-H),3.84(s,3H,O-Me),3.03(s,1H,13-H),2.49-2.64(m,1H,6-H),2.34(s,3H,4-OAc),2.27(s,3H,10-OAc),1.88(s,3H;18-Me),1.84-1.98(m,1H,6-H),1.69(s,3H,19-Me),1.27(s,3H,16-Me),1.25(s,3H,17-Me),1.07-1.12(9H,N-Boc)。13C(300MHz,CDCl3)δ205.6,172.2,171.2,170.1,169.0,164.9,162.1,159.4,155.6,153.5,139.2,137.6,134.3,130.3,129.3,129.1,128.5,127.9,119.0,114.2,104.6,98.9,90.5,87.2,84.7,81.6,81.2,79.8,76.8,72.0,68.3,59.2,58.4,57.5,55.9,55.8,44.0,39.4,38.1,35.8,30.0,29.3,28.5,25.8,23.2,22.9,22.8,21.3,20.8,16.3,9.5;[a]20 D+82(c 0.9,CHCl3)。
实施例35
13-(N-Boc-β-异丁基异丝氨酰基)-浆果赤霉素[14,1-d]-3,4-脱氢呋喃-2-酮
将搅拌下的13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-浆果赤霉素[14,1-d]-3,4-脱氢呋喃-2-酮衍生物(44mg,0.04mmol)在CH2Cl2(4mL)中的溶液冷却至0℃。向该混合物中滴加乙酰氯在甲醇中的溶液(0.01M,0.7mL),使其在室温下温热,用TLC检测反应情况:18小时后,仍存在部分起始产物,因此再加入一定量的乙酰氯溶液(0.3mL)。3小时后,加入NH4Cl饱和溶液(4mL),将有机相用Na2SO4干燥并蒸发。将残余物用柱色谱法(25→35%AcOEt的环己烷溶液)纯化,得到标题产物(30mg,85%),为白色固体。Rf=0.2(硅胶,50%AcOEt的环己烷溶液);m.p.149-154℃(CH2Cl2/iPR2O);1H-NMR(200MHz,CDCl3)δ7.95(d,J=7.4Hz,2H,Bz),7.42-7.60(m,3H,Bz),6.16(s,1H,21-H),5.99(d,J=5.5Hz,1H,2-H),5.57(s,1H,10-H),4.90(dd,J=3.7,6.2Hz,1H,5-H),4.77(d,J=10.2Hz,1H,NH),4.30-4.47(m,4H,2′-H,7-H,20-H,3′-H),3.81(d,J=5.5Hz,1H,3-H,3.00(s,1H,13-H),2.49-2.61(m,1H,6-H),2.45(s,3H,4-OAc),2.27(s,3H,10-OAc),1.84-1.97(m,1H,6-H),1.83(s,3H;18-Me),1.69(s,3H,19-Me),1.44(s,9H,N-Boc),1.27(s,3H,16-Me),1.24(s,3H,17-Me),1.01-1.07(m,8H,);13C(300MHz,CDCl3)d 205.4,172.0,171.6,171.3,170.0,164.8,156.1,154.8,139.7,136.3,134.0,130.3,128.9,128.4,115.5,90.1,84.6,81.2,81.0,77.8,76.7,73.3,71.9,68.1,58.3,57.4,51.2,42.3,39.1,38.1,35.7,29.9,29.1,28.5,25.0,23.4,23.3,22.4,21.2,20.6,16.4,9.3。
实施例36
13-乙氧羰基-7-TES-13,14-脱氢-浆果赤霉素
在氮气下,将搅拌下的13-酮基-7-TES-浆果赤霉素(150mg,0.21mmol)在无水THF(5mL)和DMPU(1mL)中的溶液冷却至-70℃。向其中滴加叔丁醇钾(0.54mL,1M在THF中,0.54mmol)并将混合物在-65℃下搅拌45分钟,然后加入ClCOOEt(31L,0.31mmol),用TLC检测反应情况:2小时30分钟后,向混合物中滴加乙酸(0.05mL,40%在THF中),使其在室温下温热。用NaCl饱和溶液(5mL)稀释后,用AcOEt(2×5mL)萃取反应混合物,将有机相用NaCl饱和溶液(5mL)洗涤、干燥(Na2SO4)并蒸发。将残余物用硅胶色谱法(1→5%在CH2Cl2中的AcOEt)纯化,得到标题产物(136mg,82%)。
Rf=0.55(硅胶,50%AcOEt的环己烷溶液);1H-NMR(200MHz,CDCl3)δ8.09(d,J=7.0Hz,2H,Bz),7.45-7.62(m,3H,Bz,),6.45(s,1H,10-H),5.83(d,J=7.4Hz,1H,2-H),5.38(s,1H,14-H),4.98(d,J=8.4Hz,1H,5-H),4.46(dd,J=6.9,3.7Hz,1H,7-H),4.16-4.35(m,4H,20-H,COOCH2CH3,),3.76(d,J=5.5Hz,1H,3-H),2.47-2.62(m,1H,6-H),2.28(s,3H,4-OAc),2.20(s,3H,10-OAc),2.04(s,3H;18-Me),1.84-1.98(m,1H,6-H),1.72(s,3H,19-Me),1.46(s,3H,16-Me),1.37(s,3H,17-Me),1.33(m,3H,COOCH2CH3),0.90-0.98(t,J=8.7Hz,9H,Si(CH2CH3)3),0.57-0.65(m,6H,Si(CH2CH3)3);13C-NMR(300MHz,CDCl3)δ201.5,170.3,169.3,166.5,153.0,151.2,136.9,134.6,133.7,130.0,129.3,128.6,119.1,84.0,80.6,80.5,75.3,73.0,72.2,65.3,58.3,44.8,41.0,37.2,27.6,21.7,21.0,18.9,14.2,13.5,10.0,6.8,5.3。
实施例37
13-苄氧羰基-7-TES-13,14-脱氢-浆果赤霉素III
在氮气下,将搅拌下的13-酮基-7-TES-浆果赤霉素III(150mg,0.21mmol)在无水THF(5mL)和DMPU(1mL)中的溶液冷却至-70℃。向该混合物中滴加叔丁醇钾(0.54mL,1M在THF中,0.54mmol),将其在-65℃下搅拌45分钟,然后加入ClCOOCH2Ph(49μl,0.31mmol),用TLC检测反应情况:2小时30分钟后,向反应中滴加乙酸(0.05mL,40%在THF中),使其在室温下温热。用NaCl饱和溶液(5mL)稀释后,用AcOEt(2×5mL)萃取反应混合物,将有机相用NaCl饱和溶液(5mL)洗涤、干燥(Na2SO4)并蒸发。将残余物用硅胶色谱法(1→3%在CH2Cl2中的AcOEt)纯化,得到标题产物(117mg,67%)。
Rf=0.6(硅胶,50%AcOEt的环己烷溶液);1H-NMR(200MHz,CDCl3)δ8.09(d,J=7.0Hz,2H,Bz),7.37-7.62(m,8H,Bz,Ar,),6.44(s,1H,10-H),5.83(d,J=7.4Hz,1H,2-H),5.39(s,1H,14-H),5.25(s,2H,CH2),4.97(d,J=8.0Hz,1H,5-H),4.45(dd,J=7.0,3.7Hz,1H,7-H),4.15-4.30(Abq,2H,20-H),3.74(d,J=7.4Hz,1H,3-H),2.47-2.62(m,1H,6-H),2.25(s,3H,4-OAc),2.20(s,3H,10-OAc),2.01(s,3H;18-Me),1.84-1.98(m,1H,6-H),1.72(s,3H,19-Me),1.44(s,3H,16-Me),1.28(s,3H,17-Me),0.90-0.98(t,J=8.7Hz,9H,Si(CH2CH3)3),0.57-0.65(m,6H,Si(CH2CH3)3);13C-NMR(300MHz,CDCl3)δ201.5,170.3,169.3,166.5,153.0,151.3,137.0,134.5,133.7,130.1,129.3,129.0,128.8,128.7,128.6,119.1,84.0,80.6,80.5,76.3,75.3,73.0,72.2,70.7,58.3,44.8,41.0,37.2,27.7,21.7,21.0,18.9,13.5,10.0,6.8,5.3。
实施例38
14-羟基-13-酮基-7-TES-浆果赤霉素III 1,14-亚硫酸酯
将14-羟基-13-酮基-7-TES-浆果赤霉素(300mg,0.42mmol)在无水CH2Cl2(3mL)中的溶液滴加至0℃的SOCl2(0.092mL,1.26mmol)和三乙胺(0.35mL,2.52mmol)在无水CH2Cl2(6mL)中的溶液中。将反应混合物搅拌20分钟,然后倒入冰-水(10mL)中,将分离出的有机相用水(10mL)洗涤、干燥(Na2SO4)并蒸发。将残余物用硅胶色谱法(10→20%AcOEt的环己烷溶液)纯化,得到两种亚硫酸酯异构体A(86mg,27%)和B(201mg,63%),为黄色固体。
异构体A-Rf=0.65(硅胶,50%AcOEt的环己烷溶液);1H-NMR(200MHz,CDCl3)δ8.09(d,J=7.0Hz,2H,Bz),7.44-7.65(m,3H,Bz),6.59(s,1H,10-H),6.16(d,J=6.2Hz,1H,2-H),5.16(s,1H,14-H),4.92(d,J=8.4Hz,1H,5-H),4.50(dd,J=6.6,3.6Hz,1H,7-H),4.12-4.38(Abq,2H,20-H),3.99(d,J=6.6Hz,1H,3-H),2.49-2.64(m,1H,6-H),2.25(s,3H,4-OAc),2.23(s,3H,10-OAc),2.19(s,3H;18-Me),1.84-1.98(m,1H,6-H),1.71(s,3H,19-Me),1.39(s,3H,16-Me),1.15(s,3H,17-Me),0.91-0.99(t,J=8.7Hz,9H,Si(CH2CH3)3),0.58-0.66(m,6H,Si(CH2CH3)3);MS:760M/Z。
异构体B-Rf=0.60(硅胶,50%AcOEt的环己烷溶液);1H-NMR(200MHz,CDCl3)δ8.03(d,J=7.3Hz,2H,Bz),7.49-7.68(m,3H,Bz),6.55(s,1H,10-H),6.13(d,J=6.9Hz,1H,2-H),4.92(d,J=8.4Hz,1H,5-H),4.90(s,1H,14-H),4.50(dd,J=6.3,4.0Hz,1H,7-H),4.12-4.37(Abq,2H,20-H),3.91(d,J=6.6Hz,1H,3-H),2.49-2.64(m,1H,6-H),2.26(s,3H,4-OAc),2.25(s,3H,10-OAc),2.21(s,3H;18-Me),1.84-1.98(m,1H,6-H),1.75(s,3H,19-Me),1.35(s,6H,16,17-Me),0.91-0.99(t,J=8.7Hz,9H,Si(CH2CH3)3),0.58-0.66(m,6H,Si(CH2CH2)3);MS:760 M/Z。
实施例39
14-羟基-13-酮基-7-TES-浆果赤霉素III 1,14-硫酸酯
方法A:将14-羟基-13-酮基-7-TES-浆果赤霉素III(300mg,0.42mmol)在无水CH2Cl2(3mL)中的溶液滴加至0℃的SO2Cl2(0.1mL,1.26mmol)和三乙胺(0.35mL,2.52mmol)在无水CH2Cl2(6mL)中的溶液中。将反应混合物搅拌20分钟,然后倒入冰-水(10mL)中,将分离出的有机相用水(10mL)洗涤、干燥(Na2SO4)并蒸发。将残余物用硅胶色谱法(10→20%AcOEt的环己烷溶液)纯化,得到标题产物(145mg,45%)和极性较小的产物(53mg),为黄色固体。
方法B:将14-羟基-13-酮基-7-TES-浆果赤霉素III 1,14-亚硫酸酯(异构体B)(91mg,0.12mmol)在CCl4(2mL)和CH3CN(2mL)中的溶液冷却至0℃,然后依次加入RuCl3(1mg)、NaIO4(38mg,0.18mmol)和水(3mL):反应混合物颜色变深,将其搅拌15分钟,然后倒入乙醚(10mL)中并将两相分离。用乙醚(5mL)萃取水相,将合并的有机相干燥(Na2SO4)并蒸发,得到标题产物(90mg,97%)。
Rf=0.65(硅胶,50%AcOEt的环己烷溶液);1H-NMR(200MHz,CDCl3)δ8.09(d,J=7.0Hz,2H,Bz),7.46-7.65(m,3H,Bz),6.59(s,1H,10-H),6.18(d,J=6.6Hz,1H,2-H),5.10(s,1H,14-H),4.92(d,J=7.6Hz,1H,5-H),4.47(dd,J=6.9,3.7Hz,1H,7-H),4.08-4.38(Abq,2H,20-H),3.88(d,J=6.6Hz,1H,3-H),2.49-2.64(m,1H,6-H),2.31(s,3H,4-OAc),2.27(s,3H,10-OAc),2.24(s,3H;18-Me),1.84-1.98(m,1H,6-H),1.70(s,3H,19-Me),1.44(s,3H,16-Me),1.36(s,3H,17-Me),0.91-0.99(t,J=8.4Hz,9H,Si(CH2CH3)3),0.58-0.66(m,6H,Si(CH2CH3)3)。
实施例40
14β-羟基-2-去苯甲酰基-2-间甲氧基苯甲酰基-7-TES-13-酮基-浆果赤霉素III
将冷却至-50℃的1M t-BuOK在THF中的溶液(2.5ml,0.86mmol)滴加至在-50℃下冷却的2-去苯甲酰基-2-间甲氧基苯甲酰基-7-TES-13-酮基-浆果赤霉素III(670mg,0.96mmol)在无水THF(9mL)和DMPU(2mL)中的溶液中。将该溶液在-60℃下搅拌45分钟,然后逐滴加入(±)-樟脑磺酰基氧氮杂环丙烷(440mg,2mmol)在无水THF(2mL)中的溶液。将混合物在-60℃下搅拌3小时,然后用10%的冰醋酸在无水THF中的溶液(2mL)处理。使混合物在室温下温热,然后用DCM(2×10mL)萃取。将合并的有机相用水、盐水洗涤并用Na2SO4干燥。粗产物无需进一步纯化直接用于随后的步骤。1H-NMR(200MHz,CDCl3)δ0.58-0.66(m,6H,Si-CH2);0.91-0.99(t,J=8.7,9H,CH2CH3);1.24(s,3H,17-Me);1.28(s,3H,16,-Me);1.75(s,3H,19-Me);1.83-2.05(m,1H,6-H);2.14(s,3H,18-Me);2.24(s,3H,10-OAc);2.26(s,3H,4-OAc);2.46-2.61(m,1H,6-H);3.64(s,1H,1-OH)3.73(d,J=1.8,1H,14-OH);3.87(d,J=6.9,1H,3-H);4.14(d,J=1.8,1H,14-H);4.31(s,2H,20-H);4.49(dd,J=10.7,6.6,1H,7-H);4.93(d,J=7.3,1H,5-H);5.89(d,J=7.0,1H,2-H);6.53(s,1H,10-H);7.54(2′,1H,m),7.13(4′,1H,dd,7.9,3.0),7.36(5′,1H,t,7.9Hz),7.61(6′,1H,d 7.9),3.85(OMe,3H,s)。
实施例41
14β-羟基-2-去苯甲酰基-2-间甲氧基苯甲酰基-7-TES-13-酮基-浆果赤霉素III 1,14-碳酸酯
将14β-羟基-2-去苯甲酰基-2-间甲氧基苯甲酰基-7-TES-13-酮基-浆果赤霉素III(12.2g)在无水DCM(50mL)和吡啶(16mL)中的溶液滴加至-10℃的20%的光气在DCM中的溶液(45mL,5当量)中。2小时后,向其中滴加5%NaHCO3水溶液(100mL)。用DCM(3×50mL)反萃取水相。将合并的有机相用硫酸钠干燥并蒸发。将反应产物粗品用快速色谱法(硅胶,DCM-AcOEt=50∶1)纯化,得到所需化合物,收率95%。1H-NMR(200MHz,CDCl3)δ0.58-0.66(m,6H,Si-CH2);0.91-0.99(t,J=8.7,9H,CH2CH3);1.21(s,3H,17-Me);1.39(s,3H,16,-Me);1.75(s,3H,19-Me);1.86-2.13(m,1H,6-H);2.22(s,3H,18-Me);2.25(s,3H,10-OAc);2.26(s,3H,4-OAc);2.48-2.63(m,1H,6-H);3.83(d,J=7.0,1H,3-H);4.30(ABq,2H,20-H);4.49(dd,J=11.0,7.0,1H,7-H);4.81(s,1H,14-H);4.93(d,J=7.3,1H,5-H);6.15(d,J=7.0,1H,2-H);6.54(s,1H,10-H);7.54(2′,1H,m),7.13(4′,1H,dd,7.9,3.0),7.36(5′,1H,t,7.9Hz),7.61(6′,1H,d 7.9),3.85(OMe,3H,s)。
实施例42
14β-羟基-2-去苯甲酰基-2-间甲氧基苯甲酰基-7-TES-浆果赤霉素III 1,14-碳酸酯
将硼氢化四乙基铵(12当量)在无水甲醇(10mL)中的混悬液冷却至-50℃并将其加至14β-羟基-2-去苯甲酰基-2-间甲氧基苯甲酰基-7-TES-13-酮基-浆果赤霉素III 1,14-碳酸酯(0.5g,0.6mmol)在甲醇(10mL)中的溶液中。起始原料消失(8小时)后,将反应用柠檬酸处理,然后用乙酸乙酯萃取。将合并的有机相用硫酸钠干燥并蒸发。所得粗品用色谱法纯化,得到所需化合物,收率60%。1H-NMR(200MHz,CDCl3)δ0.58-0.66(m,6H,Si-CH2);0.91-0.99(t,J=8.7,9H,CH2CH3);1.16(s,3H,17-Me);1.28(s,3H,16,-Me);1.74(s,3H,19-Me);1.85-2.14(m,1H,6-H);2.06(s,3H,18-Me);2.21(s,3H,10-OAc);2.33(s,3H,4-OAc);2.47-2.65(m,1H,6-H);3.74(d,J=7.4,1H,3-H);4.12-4.35(m,2H,20-H);4.49(dd,J=10.3,6.6,1H,7-H);4.82(d,1H,14-H);4.99(d,J=7.3,1H,5-H);5.00-5.03(m,1H,13-H);6.11(d,J=7.4,1H,2-H);6.45(s,1H,10-H),7.54(2′,1H,m),7.13(4′,1H,dd,7.9,3.0),7.36(5′,1H,t,7.9Hz),7.61(6′,1H,d 7.9),3.85(OMe,3H,s)。
实施例43
13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-14β-羟基-2-去苯甲酰基-2-间甲氧基苯甲酰基-7-TES-浆果赤霉素III 1,14-碳酸酯
按照实施例33中所述的相同方法,由14β-羟基-2-去苯甲酰基-2-间甲氧基苯甲酰基-7-TES-浆果赤霉素III 1,14-碳酸酯得到该产物。1H-NMR:(CDCl3,300MHz)δ6.17,(H2,d,8.5Hz),3.78,(H3,d,8.3Hz),4.95,(H5,dd,9.5,1.1Hz),2.54,(H6α,m),1.90,(H6β,m),3.96,(H7,d,6.7Hz),6.51,(H10,s),6.49,(H13,m),4.87,(H14,d,6.8Hz),1.40,(H16,s),1.35,(H17,s),2.18,(H18,s),1.76,(H19,s),4.29,(H20α,AB体系,22.6,8.3Hz),6.51,(H2′,m),7.29,(H3′,m),1.65,(H4′,m),1.88,(H5′,m),1.12,(H6′,d,6.3Hz),1.12,(H7′,d,6.3Hz),2.34,(4 Ac,s),2.24,(10 Ac,s),1.40,(Boc,s),8.06,6.51,(2,4二MeOPhCH,m),3.91,(MeO Ph,s),3.86,(MeO Ph,s),2.81,(OH,br s),1.56,(OH,br s),0.97,(CH3Tes,t,8.1),0.62,(CH2Tes,q,8.1Hz),7.54(2′,1H,m),7.13(4′,1H,dd,7.9,3.0),7.36(5′,1H,t,7.9Hz),7.61(6′,1H,d 7.9),3.85(OMe,3H,s)。
实施例44
13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-14β-羟基-2-去苯甲酰基-2-间甲氧基苯甲酰基浆果赤霉素III 1,14-碳酸酯
按照实施例34中所述的相同方法,由13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-14β-羟基-2-去苯甲酰基-2-间甲氧基苯甲酰基-7-TES-浆果赤霉素III 1,14-碳酸酯得到该产物。1H-NMR:(CDCl3,300MHz)δ6.16(H2,d 7.5Hz),3.78(H3,d 7.4Hz),4.98(H5,dd 9.5,2.2Hz),2.59(H6α,ddd 15.0,9.8,6.4Hz),1.94(H6β,ddd 14.9,11.4,2.7Hz),4.48(H7,dd 10.9,6.5Hz),6.34(H10,s),6.52(H13,m),4.87(H14,d 6.7Hz),1.40(H16,s),1.33(H17,s),2.05(H18,s),1.76(H19,s),4.33(H20α,d 8.3),4.27(H20β,d 8.3Hz),6.53(H2′,m),7.29(H3′,m),1.65-1.88(H4′,m),1.77(H5′,m),1.11(H6′,d 6.2Hz),1.11(H7′,d 6.2Hz),2.30(4 Ac,s),2.34(10 Ac,s),1.40(Boc,s),6.51-6.57(2,4二MeOPhCH,m),3.91(MeO Ph,s),3.86(MeOPh,s),2.81(OH,br s)7.54(2′,1H,m),7.13(4′,1H,dd,7.9,3.0),7.36(5′,1H,t,7.9Hz),7.61(6′,1H,d 7.9),3.85(OMe,3H,s)。
实施例45
13-(N-Boc-β-异丁基异丝氨酰基)-14β-羟基-2-去苯甲酰基-2-间甲氧基苯甲酰基浆果赤霉素III 1,14-碳酸酯
按照实施例35中所述的相同方法,由13-[N-Boc-N,O-(2,4-二甲氧基亚苄基)-β-异丁基异丝氨酰基]-14β-羟基-2-去苯甲酰基-2-间甲氧基苯甲酰基-7-TES-浆果赤霉素III 1,14-碳酸酯得到该产物。1H-NMR(200MHz,CDCl3)δ6.09(2,1H,d,7.3Hz),3.68(3,1H,d,7.4Hz),4.93(5,1H,dd,9.7,2.5Hz),2.52(6α,1H,ddd,14.8,9.8,6.9Hz),1.86(6β,1H,m),4.37(7,1H,m),6.25(10,1H,s),6.44(13,1H,d,宽峰,6.9Hz),4.83(14,1H,d,6.9Hz),1.26(16,3H,s),1.33(17,3H,s),1.88(18,3H,d,1.6Hz),1.70(19,3H,s),4.32(20a,1H,d,8.3Hz),4.20(20b,1H,d,8.3Hz),2.46(4-CO2CH3,3H,s),2.23(10-CO2CH3,3H,s),4.30(2′,1H,dd,6.4,3.2Hz),4.08(3′,1H,m),1.21(4′a,1H,m),1.43(4′b,1H,m),1.68(5′,1H,m),0.96(6′a,3H,d,6.3Hz),0.95(6′b,3H,d,6.3Hz),1.34(Boc,9H,s),4.73(NH,1H,d,9.8.Hz),7.54(2″,1H,m),7.13(4″,1H,dd,7.9,3.0),7.36(5″,1H,t,7.9Hz),7.61(6″,1H,d7.9),3.85(OMe,3H,s)。

Claims (8)

1.式III的化合物:
Figure A038213380002C1
其中:
X   为-N3、-NH2、-NH-R3、=CH-R8,或者当R6不是苯基时为-O-R3
R2  为氢或酰基;
R3  为C1-C4烷氧羰基,或者与R4一起形成羰基、硫代羰基、SO、SO2基团;
R4  为氢,或者与R3或R8一起形成R3和R8的各自定义中所列举的基团;
R5  为氢或醇保护基;
R6  为芳基、取代的芳基、杂芳基,条件是当X是-O-R3时,其不是苯基;
R8  为氢、C1-C4烷基、C1-C4烷氧羰基,或者与R4一起形成羰基;
R9  为酰基或羟氨基酰基。
2.由式II化合物制备式III化合物的方法:
Figure A038213380002C2
其中:
E为-N3、-NH-R3、=CH-R8,或者当R6不是苯基时为-O-R3,且R2、R5、R4和R6如权利要求1中所定义,
该方法包括:
a)还原C13位羰基,得到式VII的化合物:
Figure A038213380003C1
其中:
X为-O-R3、-N3、-NH-R3、-CH2-R8
Y和Z为氢,或者当X为-CH2-R8时,两者一起形成双键;
且其它基团如以上所定义;
b)用式IX的酸衍生物在13位进行酯化,得到式VIII的化合物:
Figure A038213380003C2
其中:
R4、R5、R6、R9和X如以上所定义;
c)任选裂解保护基。
3.由式I化合物制备式II化合物的方法:
Figure A038213380004C1
其中:
R1   为醇保护基;
R2   为酰基或醇保护基;
E    为-OH、-O-R3、=N2、-N3、-NH22、-NH-R3、-NH-NH2、-NH-N=N-Ts、-NH-N=N-Boc、-N(CO2R7)NHCO2R7、=CH-R8
Ts  为对甲苯磺酰基;
R3  为C1-C4烷氧羰基,或者与R4一起形成羰基、硫代羰基、SO、SO2基团;
R4  为氢,或者与R3或R8一起形成R3和R8的各自定义中所列举的基团;
R5  为氢或醇保护基;
R6  为芳基、取代的芳基、杂芳基;
R7  为C1-C4烷基、芳基或芳基烷基;
R8  为氢、C1-C4烷基、C1-C4烷氧羰基,或者与R4一起形成羰基,该方法包括:
a)使式I的7位被保护的13-酮基浆果赤霉素与碱反应,形成式IV的烯醇化物中间体;
b)用可被转化为E基团的合适的亲电子试剂或用酰化剂、烷基化剂或甲硅烷基化剂处理烯醇化物IV,得到式V化合物:
其中R10为烷基、酰基或甲硅烷基,然后可将其转化为化合物II。
4.由式XIII化合物开始制备式XIV化合物的方法:
Figure A038213380005C2
其中:
R2  为酰基或醇保护基;
R3  为氢、酰基、烷基,或者与R4一起形成C=O、C=S、SO、SO2基团;
R4  为氢,或者与R3一起形成C=O、C=S、SO、SO2基团;
R5  为氢或醇保护基;
R6  为芳基、取代的芳基、杂芳基;
该方法包括:
a)将叠氮基选择性地还原为氨基;
b)任选与烷基化剂或酰化剂反应;
c)裂解C7位的保护基;
d)打开噁唑烷环。
5.式II的化合物:
Figure A038213380006C1
其中:
E、R2、R4、R5和R6如权利要求3中所定义。
6.式IV、V的化合物:
Figure A038213380006C2
其中:
M    为碱金属;
R10  为酰基、烷基、甲硅烷基或磷酰基;
R1、R2、R6如权利要求3中所定义。
7.式VII的化合物:
其中:
R2、R4、R5、R6、X、Z和Y如权利要求2中所定义。
8.式XI和XII的化合物:
Figure A038213380007C2
其中:
X   为-N3、-NH-R3、=CH-R8,或者当R6不是苯基时为-O-R3
R3  为烷氧羰基,或者与R4一起形成羰基、硫代羰基、SO、SO2基团;
R4  为氢,或者与R3或R8一起形成R3和R8的各自定义中所列举的基团;
R6  为芳基、取代的芳基或杂芳基;
R5  为氢或醇保护基;
R8  为氢、C1-C4烷基、C1-C4烷氧羰基,或者与R4一起形成羰基。
CNA038213389A 2002-09-10 2003-09-05 14位官能化的紫杉烷衍生物及其制备方法 Pending CN1681799A (zh)

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