CN106749296B - 一种手性呋喃并[3,2-c]色烯类化合物的不对称合成方法 - Google Patents

一种手性呋喃并[3,2-c]色烯类化合物的不对称合成方法 Download PDF

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CN106749296B
CN106749296B CN201710155687.XA CN201710155687A CN106749296B CN 106749296 B CN106749296 B CN 106749296B CN 201710155687 A CN201710155687 A CN 201710155687A CN 106749296 B CN106749296 B CN 106749296B
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夏爱宝
汤成科
许丹倩
张晓龙
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Zhejiang University of Technology ZJUT
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Abstract

本发明提供了一种如式(I)所示的手性呋喃并[3,2‑c]色烯类化合物的不对称合成方法:将式(II)所示4‑羟基香豆素类化合物和式(III)所示吡唑烯酮类化合物、手性方酸催化剂、有机溶剂混合,在‑20~60℃下反应0.1~48h,得到式(IV)所示的化合物;向式(IV)所示的化合物中加入含碘类添加剂和碱性物质,在‑20~60℃下反应0.1~48h,最后反应液经后处理得到式(I)所示的手性呋喃并[3,2‑c]色烯类化合物;本发明所述的不对称合成方法反应条件温和,产物收率高、选择性优异,适用于工业生产;制备的手性呋喃并[3,2‑c]色烯类化合物具有手征性,可应用于有机合成、材料等领域。

Description

一种手性呋喃并[3,2-c]色烯类化合物的不对称合成方法
(一)技术领域
本发明涉及一种手性呋喃并[3,2-c]色烯类化合物的不对称合成方法。
(二)背景技术
具有特殊功能化结构的手性呋喃并[3,2-c]色烯类结构大量存在于具有生物活性的天然产物和临床医药中,常用作抗凝剂、抗霉素、HIV蛋白抑制剂等,如:Coumestan,一种具有护肝、止血、降血压等重要生理活性的天然产物,主要存在于各种豆类植物中,包括豌豆、花豆、利马豆,尤其是紫花苜蓿和苜蓿芽中。Coumestrol,一种存在于豆科类植物紫苜蓿中的植物雌激素,具有抗生育和抗真菌等作用,可通过抑制破骨细胞的形成、抗酒石酸酸性磷酸酶的活性和骨吸收作用,抑制破骨细胞分化和骨吸收活性,具有抗骨质疏松作用。同时,能增加膝骨关节炎患者关节软骨细胞OPG表达及OPG/RANKL值,减少其MMP-1、MMP-3表达,具有一定的软骨保护作用。Glaupalol,一种存在于日本特有的芍药科类植物Glaucidiaceae中的天然产物,主要能增强微管蛋白在体外的聚合作用,同时能和紫杉醇协同抑制人体口腔KB癌细胞的增殖。Cyclobrachycoumarin,一种存在于阿根廷菊科类植物Brachyclados megalanthus根茎中的天然产物,具备较强的抗菌活性,常被用作抗生素使用。Coumestan、Coumestrol、Glaupalol、Cyclobrachycoumarin的分子结构式如下所示:
近十几年,有机小分子催化,特别是方酸催化在有机合成领域得以迅速发展。手性方酸催化在手性不对称串联反应中取得很大成就,特别是在构建复杂手性分子方面提供了极好的合成手段。2008年,Rawal教授报道了用金鸡纳碱衍生的手性方酸催化剂催化乙酰丙酮和硝基烯烃类化合物的不对称Michael反应,取得了高达99%的收率和98%ee值的光学活性产物。2010年,杜大明课题组报道了用金鸡纳碱衍生物的手性方酸催化剂催化的硝基甲烷和查尔酮的不对称Michael反应,产物的收率和对应选择性分别高达99%和96%。手性方酸催化剂在提高反应效率,避免浪费和提高原子经济性等方面具有一定优势,符合绿色化学的要求,具有广阔的发展空间。
(三)发明内容
本发明的目的在于提供一种在温和的条件下,制备手性手性呋喃并[3,2-c]色烯类化合物的不对称合成方法。
为实现上述目的,本发明采用如下技术方案:
一种如式(I)所示的手性呋喃并[3,2-c]色烯类化合物的不对称合成方法,其特征在于,所述的合成方法包括(A)Michael反应和(B)环化反应两个步骤,并且所述的合成方法按如下步骤进行:
(A)Michael反应:以式(II)所示4-羟基香豆素类化合物和式(III)所示吡唑烯酮类化合物为原料,在手性方酸催化剂作用下,在有机溶剂A中混合均匀,在-20~60℃下反应0.1~48h,反应结束后,将反应液蒸除溶剂得到式(IV)所示的化合物;所述的式(II)所示4-羟基香豆素类化合物和式(III)所示吡唑烯酮类化合物、手性方酸催化剂的物质的量之比为1:1~10:0.01~0.3,优选为1:1.2:0.1;
(B)环化反应:向步骤(A)中制得所得的式(IV)所示化合物中,加入碘源添加剂、碱性物质,在有机溶剂B中混合均匀,在-20~60℃下反应0.1~48h,反应结束后,反应液经后处理得到式(I)所示的手性呋喃并[3,2-c]色烯类化合物;所述的式(IV)所示化合物和碘源添加剂、碱的物质的量之比为1:0.5~10:1~10,优选为1:2:2。
所述式(I)、式(II)、式(III)和式(IV)中,
所述R1为氢、C1~20烷基、甲氧基、硝基、氰基、氟、氯、溴、2-甲氧基苯基、3-甲氧基苯基、4-甲氧基苯基、2-甲基苯基、3-甲基苯基、4-甲基苯基、2-硝基苯基、3-硝基苯基、4-硝基苯基、2,2,2-三氟乙基、苯基、2-氟苯基、3-氟苯基、4-氟苯基、2-氯苯基、3-氯苯基、4-氯苯基、2-溴苯基、3-溴苯基、4-溴苯基、苄基、2-氟苄基、3-氟苄基、4-氟苄基、2-氯苄基、3-氯苄基、4-氯苄基、2-溴苄基、3-溴苄基、4-溴苄基、2-三氟甲基苯基、3-三氟甲基苯基、4-三氟甲基苯基、呋喃基、噻吩基或3,5-二-三氟甲基苯基。
所述R2、R4各自独立为氢、C1~C20烷基、2-甲氧基苯基、3-甲氧基苯基、4-甲氧基苯基、2-甲基苯基、3-甲基苯基、4-甲基苯基、2-硝基苯基、3-硝基苯基、4-硝基苯基、2,2,2-三氟乙基、苯基、2-氟苯基、3-氟苯基、4-氟苯基、2-氯苯基、3-氯苯基、4-氯苯基、2,4-二氯苯基、2-溴苯基、3-溴苯基、4-溴苯基、苄基、2-氟苄基、3-氟苄基、4-氟苄基、2-氯苄基、3-氯苄基、4-氯苄基、2-溴苄基、3-溴苄基、4-溴苄基、2-三氟甲基苯基、3-三氟甲基苯基、4-三氟甲基苯基、呋喃基、噻吩基或3,5-二-三氟甲基苯基。
所述R3为C1~C20烷基。
进一步,所述的手性呋喃并[3,2-c]色烯类化合物为式(Ia)所示的化合物:
式(Ia)中,R1、R2、R3和R4的定义同式(I)。
更为具体的,所述的手性呋喃并[3,2-c]色烯类化合物化合物为下列之一:
1)(2R,3S)-3'-甲基-1',3-二-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
2)(2R,3S)-3-(3-甲氧苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
3)(2R,3S)-3'-甲基-1'-苯基-3-(4-甲基苯基)-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
4)(2R,3S)-3-(3-氟苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
5)(2R,3S)-3-(4-氯苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
6)(2R,3S)-3-(3-溴苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
7)(2R,3S)-3'-甲基-3-(4-硝基苯基)-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
8)(2R,3S)-3'-甲基-1'-苯基-3-(噻吩基)-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
9)(2R,3S)-3-(2-甲氧苯基)-3',8-二甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
10)(2R,3S)-3-(4-氯苯基)-7-甲氧基-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
11)(2R,3S)-3',6-二甲基-1',3-二苯基-3H,4H-螺[呋喃并[3,2-c]吡喃-2,4'-吡唑]-4,5'(1'H)-二酮;
12)(2R,3S)-3-(3-氯苯基)-3',6-二甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]吡喃-2,4'-吡唑]-4,5'(1'H)-二酮。
13)(2R,3S)-3-(2-甲氧苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
14)(2R,3S)-3-(4-甲氧苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
15)(2R,3S)-3'-甲基-1'-苯基-3-(2-甲基苯基)-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
16)(2R,3S)-3'-甲基-1'-苯基-3-(3-甲基苯基)-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
17)(2R,3S)-3-(4-氟苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
18)(2R,3S)-3-(3-氯苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
19)(2R,3S)-3-(2,4-二氯苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
20)(2R,3S)-3'-甲基-3-(3-硝基苯基)-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
21)(2R,3S)-3'-甲基-1'-苯基-3-(3-三氟甲基苯基)-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
22)(2R,3S)-3'-乙基-1',3-二-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
23)(2R,3S)-3-(4-氯苯基)-7-甲氧基-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
24)(2R,3S)-3-(4-溴苯基)-7-甲氧基-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
25)(2R,3S)-3'-甲基-3-(2-硝基苯基)-7-甲氧基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
26)(2R,3S)-3-(2-甲氧苯基)-3'8-二甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
27)(2R,3S)-3-(3-氟苯基)-3'8-二甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
28)(2R,3S)-3-(4-氯苯基)-3'8-二甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
29)(2R,3S)-3-(3-硝基苯基)-3'8-二甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
30)(2R,3S)-3-(3-硝基苯基)-8-氯-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
31)(2R,3S)-8-氯-3'-甲基-3-(3-硝基苯基)-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
本发明合成方法步骤(A)中,所述的手性方酸催化剂可选自式(V)~(XIII)所示的化合物之一,优选为式(VII)所示的化合物:
本发明合成方法步骤(A)中,所述的有机溶剂A的体积用量以初始原料式(II)所示4-羟基香豆素类化合物的物质的量计为0.5~15mL/mmol,优选为5mL/mmol。
进一步,步骤(B)中,所述的碘源添加剂为碘化钾、碘化钠、碘化铜、碘化亚铜、四丁基碘化铵、碘单质、碘化氢、醋酸碘苯,优选为碘单质。
进一步,步骤(B)中,所述的碱性物质为氢氧化钠、氢氧化钾、碳酸氢钠、碳酸钾、碳酸钙、碳酸钠、碳酸锂、碳酸铯、三乙烯二胺、二乙胺、三乙胺、1,8-二氮杂二环十一碳-7-烯、吡啶、4-二甲氨基吡啶、N-甲基吗啉、四甲基乙二胺、叔丁醇钾或正丁基锂,优选为三乙烯二胺。
进一步,步骤(B)中,所述有机溶剂B的体积用量以步骤(A)所得化合物(IV)的物质的量计为0.5~15mL/mmol,优选为5mL/mmol。
再进一步,所述步骤(A)和步骤(B)中,所述的有机溶剂A和B各自独立为二氯甲烷、氯仿、1,2-二氯乙烷、1,1,2-三氯乙烷、乙醚、异丙醚、四氢呋喃、1,4-二氧六环、乙酸乙酯、甲苯、二甲苯、三氟甲苯、二甲基亚砜、N,N-二甲基甲酰胺、乙腈、甲醇、乙醇或异丙醇,分别优选为二氯甲烷和乙腈。
本发明合成方法步骤(A)和步骤(B)中,优选为40℃条件下分别反应0.5h和2h。
进一步,步骤(B)中,所述反应液后处理的方法为:反应结束后,反应液用乙酸乙酯萃取,萃取液蒸馏脱除溶剂后,剩余物用200~300目硅胶进行柱层析分离,洗脱剂为乙酸乙酯与石油醚体积比1:2~70的混合液,收集含目标化合物的洗脱液,蒸除溶剂并干燥,即得式(I)所示的手性呋喃并[3,2-c]色烯类化合物。
与现有技术相比,本发明的优点在于:
(1)本发明所述的不对称合成方法反应条件温和,产物收率高、选择性优异,适用于工业生产。
(2)本发明的合成方法,操作简单,制备的手性苯并二氢吡喃类化合物具有手征性,可应用于有机合成、材料等领域。
(四)具体实施方式
下面结合具体实施例对本发明进行进一步描述,但本发明的保护范围并不仅限于此。
实施例1:(2R,3S)-3'-甲基-1',3-二-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物1-A(0.2mmol,0.0524g),手性方酸催化剂X(0.1mmol,0.0109g),溶剂氯仿(2mL),加入小磁子,25℃反应0.5h后,得到中间体化合物1-B(0.2mmol,0.0848g);
(B)取中间体化合物1-B(0.2mmol,0.0848g),再加入碘化亚铜(0.4mmol,0.076g),碳酸钾(0.6mmol,0.0828g),溶剂乙腈(2mL),25℃反应8h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0819g,97%yield,98%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ=7.94(d,J=7.5Hz,2H),7.77-7.75(dd,J1=8Hz,J2=1Hz,1H),7.69-7.66(m,1H),7.49-7.45(m,3H),7.39-7.35(m,4H),7.28-7.25(m,1H),7.17-7.15(m,2H),5.30(s,1H),5.27(s,1H),1.49(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=169.4,166.8,158.6,157.0,155.3,137.2,133.4,133.0,129.1(×2),129.0(×2),128.7,127.8(×2),125.7,124.3,123.0,118.6(×2),117.0,111.6,102.8,92.4,54.0,14.2ppm。
实施例2:(2R,3S)-3-(3-甲氧苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物2-A(1mmol,0.292g),手性方酸催化剂V(0.05mmol,0.0051g),溶剂甲苯(3mL),加入小磁子,60℃反应0.1h后,得到中间体化合物2-B(0.2mmol,0.0908g);
(B)取中间体化合物2-B(0.2mmol,0.0908g),再加入醋酸碘苯(0.4mmol,0.1288g),三乙烯二胺(0.6mmol,0.0606g),溶剂四氢呋喃(3mL),-20℃反应48h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0777g,86%yield,86%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ=7.94-7.92(dd,J1=9Hz,J2=1Hz,2H),7.76-7.74(dd,J1=8Hz,J2=1.5Hz,1H),7.70-7.66(m,1H),7.50-7.45(m,3H),7.40-7.36(m,1H),7.29-7.25(m,2H),6.90-6.88(dd,J1=8.5Hz,J2=2.5Hz,1H),6.75(d,J=7.5Hz,1H),6.67(t,J=2Hz,1H),5.24(s,1H),3.73(s,3H),1.55(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=169.5,166.9,160.1,158.6,157.0,155.4,137.3,134.5,133.5,130.2,129.0(×2),125.8,124.4,123.0,120.2,118.7(×2),117.1,114.0,113.9,111.7,102.9,92.4,55.3,54.0,14.4ppm。
实施例3:(2R,3S)-3'-甲基-1'-苯基-3-(4-甲基苯基)-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物3-A(0.2mmol,0.0552g),手性方酸催化剂VI(0.01mmol,0.0013g),溶剂乙腈(0.1mL),加入小磁子,60℃反应0.1h后,得到中间体化合物3-B(0.2mmol,0.0876g)
(B)取中间体化合物3-B(0.2mmol,0.0876g),加入单质碘(0.1mmol,0.0106g),三乙胺(0.2mmol,0.0202g,),溶剂甲醇(0.1mL),60℃反应48h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0645g,84%yield,94%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ=7.95-7.94(m,2H),7.77-7.75(dd,J1=7.5Hz,J2=1Hz,1H),7.70-7.68(m,1H),7.51-7.45(m,3H),7.40-7.37(m,1H),7.29-7.26(m,1H),7.17(d,J=7.5Hz,2H),7.04(d,J=8Hz,2H),5.26(s,1H),2.35(s,3H),1.53(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=169.6,166.8,158.7,157.2,155.4,138.7,137.3,133.4,129.9,129.8(×2),129.0(×2),127.8(×2),125.7,124.3,122.9,118.7(×2),117.1,111.7,103.1,92.5,54.0,21.1,14.4ppm。
实施例4:(2R,3S)-3-(3-氟苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物4-A(0.28mmol,0.0784g),手性方酸催化剂VII(0.3mmol,0.189g),溶剂1,2-二氯乙烷(3mL),加入小磁子,-20℃反应48h后,得到中间体化合物4-B(0.2mmol,0.0884g);
(B)取中间体化合物4-B(0.2mmol,0.0884g),加入碘化钾(0.3mmol,0.0498g),三乙胺(0.4mmol,0.0404g),溶剂二氯甲烷(3mL),60℃反应0.1h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0674g,82%yield,97%ee,>20:1dr),1HNMR(500MHz,CDCl3):δ=7.94-7.92(dd,J1=9Hz,J2=1Hz,2H),7.77-7.75(dd,J1=8Hz,J2=1.5Hz,1H),7.72-7.68(m,1H),7.51-7.45(m,3H),7.41-7.38(m,1H),7.29-7.26(m,1H),7.16-7.14(m,2H),7.09-7.05(m,2H),5.27(s,1H),1.56(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=163.8,161.9,158.6,137.2,133.7,129.7(d,JCF=8.3Hz),129.1(×2),128.9(d,JCF=3.3Hz),125.9,124.5,123.0,118.7(×2),117.2,111.6,102.7,92.4(d,JCF=1Hz),53.5,14.4ppm。
实施例5:(2R,3S)-3-(4-氯苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物5-A(0.2mmol,0.0592g),手性方酸催化剂VIII(0.02mmol,0.0107g),溶剂四氢呋喃(1mL),加入小磁子,40℃反应8h后,得到中间体化合物5-B(0.2mmol,0.0816g);
(B)取中间体化合物5-B(0.2mmol,0.0816g),加入四丁基碘化铵(0.5mmol,0.1845g),氢氧化钠(0.8mmol,0.0672g),溶剂乙酸乙酯(1mL),40℃反应6h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0839g,86%yield,94%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ=7.93-7.91(dd,J1=9Hz,J2=1Hz,2H),7.77-7.75(dd,J1=6Hz,J2=1.5Hz,1H),7.72-7.69(m,1H),7.52-7.46(m,3H),7.40-7.35(m,1H),7.30-7.29(m,1H),7.28-7.27(m,1H),7.12-7.10(dd,J1=11Hz,J2=2.5Hz,2H),5.26(s,1H),1.57(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=169.3,167.1,158.6,156.7,155.5,137.3,134.9,133.7,131.6,129.4(×2),129.3(×2),129.1(×2),125.9,124.5,123.1,118.8(×2),117.2,111.6,102.5,92.4,53.6,14.5ppm。
实施例6:(2R,3S)-3-(3-溴苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物6-A(0.2mmol,0.0592g),手性方酸催化剂IX(0.006mmol,0.00287g),溶剂乙酸乙酯(3mL),加入小磁子,-20℃反应0.1h后,得中间体化合物6-B(0.2mmol,0.0904g)
(B)取中间体化合物6-B(0.2mmol,0.0904g),加入碘化氢(2mmol,0.256g),二乙胺(0.8mmol,0.0584g),溶剂乙酸乙酯(3mL),30℃反应18h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0831g,82%yield,97%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ=7.93-7.91(m,2H),7.77-7.76(dd,J1=7.5Hz,J2=1.5Hz,1H),7.73-7.69(m,1H),7.52-7.46(m,4H),7.42-7.38(m,1H),7.31-7.24(m,3H),7.11(d,J=7.5Hz,1H),5.22(s,1H),1.57(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=169.2,167.2,158.6,156.5,155.5,137.2,1335.5,133.8,132.1,131.0,130.8,129.1(×2),126.8,126.0,124.5,123.4,123.1,118.9(×2),117.3,111.6,102.3,92.3,53.6,14.5ppm。
实施例7:(2R,3S)-3'-甲基-3-(4-硝基苯基)-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物7-A(0.4mmol,0.1228g),手性方酸催化剂X(0.1mmol,0.0109g),溶剂甲苯(1mL),加入小磁子,40℃反应20h后,得中间体化合物7-B(0.2mmol,0.0811g),
(B)取中间体化合物7-B(0.2mmol,0.0811g),加入碘化氢(2mmol,0.256g),二乙胺(0.8mmol,0.0584g),溶剂乙酸乙酯(1mL),40℃反应20h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0643g,74%yield,84%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ=8.22(d,J=8.5Hz,2H),7.15(d,J=7.5Hz,2H),7.78-7.76(dd,J1=8Hz,J2=1.5Hz,1H),7.74-7.71(m,1H),7.52-7.46(m,3H),7.43-7.36(m,3H),7.30-7.27(m,1H),5.37(s,1H),1.58(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=168.9,167.5,158.5,155.9,155.6,148.1,140.2,137.0,134.0,129.14(×2),129.10(×2),126.1,124.7,124.2(×2),123.1,118.7(×2),117.3,111.4,101.8,92.2,53.7,14.4ppm。
实施例8:(2R,3S)-3'-甲基-1'-苯基-3-噻吩基)-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物8-A(0.2mmol,0.0538g),手性方酸催化剂V(0.004mmol,0.0021g),溶剂氯仿(1mL),加入小磁子,60℃反应20h后,得中间体化合物8-B(0.2mmol,0.0801g);
(B)取中间体化合物8-B(0.2mmol,0.0801g),加入碘单质(0.1mmol,0.0106g),碳酸钾(0.3mmol,0.0414g),溶剂四氢呋喃(1mL),60℃反应1h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0796g,93%yield,90%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ=7.94-7.92(m,2H),7.78-7.76(dd,J1=8Hz,J2=1.5Hz,1H),7.71-7.68(m,1H),7.51-7.45(m,3H),7.40-7.37(m,1H),7.32-7.31(dd,J1=5Hz,J2=1Hz,1H),7.29-7.26(m,1H),7.04-7.02(dd,J1=5Hz,J2=1Hz,1H),6.96-6.95(m,1H),5.46(s,1H),1.62(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=168.9,166.8,158.4,156.8,155.5,137.3,136.5,133.7,129.1(×2),127.8,127.1,126.3,126.0,124.5,123.2,118.8(×2),117.2,116.7,103.6,92.1,49.2,14.1ppm。
实施例9:(2R,3S)-3-(2-甲氧苯基)-3',8-二甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基-8-甲基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物9-A(0.2mmol,0.0538g),手性方酸催化剂VI(0.03mmol,0.0039g),溶剂乙腈(0.1mL),加入小磁子,40℃反应1h后,得中间体化合物9-B(0.2mmol,0.0601g);
(B)取中间体化合物9-B(0.2mmol,0.0601g),蒸馏移除溶剂后,再加入四丁基碘化铵(0.5mmol,0.1845g),碳酸铯(0.4mmol,0.1304g),溶剂甲醇(0.1mL),40℃反应4h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0503g,54%yield,99%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ=7.98-7.96(dd,J1=8.5Hz,J2=1Hz,2H),7.53(s,1H),7.48-7.44(m,3H),7.38(d,J=8.5Hz,1H),7.33-7.30(m,1H),7.28-7.23(dd,J1=15Hz,J2=8Hz,1H),7.20-7.18(dd,J1=7.5Hz,J2=1Hz,1H),6.96(t,J=7.5Hz,1H),6.82(d,J=8Hz,1H),5.52(s,1H),3.51(s,3H),2.44(s,3H),1.44(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=169.6,166.6,159.2,157.1,156.4,153.7,137.7,134.4,134.2,129.7,129.0(×2),128.5,125.3,122.5,122.0,120.6,118.2(×2),116.8,111.6,110.0,102.2,92.2,55.1,48.6,20.8,13.9ppm。
实施例10:(2R,3S)-3-(4-氯苯基)-7-甲氧基-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成
(A)取干净10mL小试管,加入4-羟基-7-甲氧基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物10-B(0.2mmol,0.0592g),手性方酸催化剂VII(0.01mmol,0.0063g),溶剂1,2-二氯乙烷(1mL),加入小磁子,40℃反应0.1h后,得中间体化合物10-B(0.2mmol,0.0801g);
(B)取中间体化合物10-B(0.2mmol,0.0801g),加入碘化钾(0.3mmol,0.0498g),三乙胺(0.4mmol,0.0404g),溶剂二氯甲烷(1mL),40℃反应2h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0797g,79%yield,93%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ=7.91-7.89(dd,J1=8.5Hz,J2=1Hz,2H),7.75(d,J=2.5Hz,1H),7.65-7.63(dd,J1=9Hz,J2=2.5Hz,1H),7.52-7.44(m,4H),7.30-7.24(m,3H),7.08(d,J=8Hz,1H),5.21(s,1H),1.55(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=169.0,166.0,157.9,156.2,153.8,137.1,135.2,133.7,132.2,130.9,130.8,130.1,129.1(×2),126.7,126.0,123.4,122.5,118.9(×2),118.7,112.7,103.4,92.4,53.5,14.4ppm。
实施例11:(2R,3S)-3',6-二甲基-1',3-二苯基-3H,4H-螺[呋喃并[3,2-c]吡喃-2,4'-吡唑]-4,5'(1'H)-二酮的合成
(A)取干净10mL小试管,加入4-羟基-6甲基-吡喃酮(0.2mmol,0.0252g),吡唑烯酮类化合物11-A(0.2mmol,0.0524g),手性方酸催化剂VIII(0.02mmol,0.0107g),溶剂四氢呋喃(1mL),加入小磁子,40℃反应8h后,得中间体化合物11-B(0.2mmol,0.0777g)
(B)取中间体化合物11-B(0.2mmol,0.0777g),加入四丁基碘化铵(0.5mmol,0.1845g),碳酸钠(0.8mmol,0.0672g),溶剂乙酸乙酯(1mL),40℃反应6h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0717g,87%yield,91%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ=7.90(d,J=8Hz,2H),7.45(t,J=8Hz,2H),7.35-7.33(dd,J1=5Hz,J2=2Hz,3H),7.26(t,J=7Hz,1H),7.12-7.10(m,2H),6.18(s,1H),5.13(s,1H),2.38(s,3H),1.44(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=171.5,169.6,167.5,160.2,157.1,137.3,133.1,129.1(×2),129.0(×2),128.7,127.9(×2),125.7,118.7(×2),99.8,95.3,92.3,53.2,20.6,14.2ppm。
实施例12:(2R,3S)-3-(3-氯苯基)-3',6-二甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]吡喃-2,4'-吡唑]-4,5'(1'H)-二酮的合成
(A)取干净10mL小试管,加入4-羟基-6甲基-吡喃酮(0.2mmol,0.0252g),吡唑烯酮类化合物12-A(0.2mmol,0.0592g),手性方酸催化剂VI(0.03mmol,0.0039g,),溶剂乙腈(0.5mL),加入小磁子,25℃反应1h后,得中间体化合物12-B(0.2mmol,0.0677g);
(B)取中间体化合物12-B(0.2mmol,0.0677g),加入单质碘(0.15mmol,0.0159g),吡啶(0.4mmol,0.0404g),溶剂甲醇(0.5mL),25℃反应4h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0675g,81%yield,95%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ=7.89-7.87(dd,J1=9Hz,J2=1.5Hz,2H),7.47-7.44(m,2H),7.34-7.25(m,3H),7.11(t,J=2Hz,2H),7.01(d,J=2Hz,1H),6.19(s,1H),5.07(s,1H),2.39(s,3H),1.51(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=171.7,169.3,167.9,160.0,156.6,137.2,135.3,135.1,130.4,129.1(×2),129.0(×2),128.0(×2),126.2,125.9,118.8(×2),99.3,95.3,92.1,52.7,20.7,14.3ppm。
实施例13:(2R,3S)-3-(2-甲氧苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物13-A(1mmol,0.292g),手性方酸催化剂XI(0.03mmol,0.0168g),溶剂1,1,2-三氯乙烷(2mL),加入小磁子,40℃反应1h后,得到中间体化合物13-B(0.2mmol,0.0908g);
(B)取中间体化合物13-B(0.2mmol,0.0908g),再加入碘化钠(0.4mmol,0.06g),碳酸氢钠(0.6mmol,0.0504g),溶剂二甲基亚砜(3mL),0℃反应48h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0660g,73%yield,98%ee,>20:1dr),1HNMR(500MHz,CDCl3):δ7.98(d,J=8Hz,2H),7.74-7.72(dd,J1=8Hz,J2=1Hz,1H),7.69-7.65(m,1H),7.50-7.45(m,3H),7.38-7.30(m,2H),7.28-7.23(m,1H),7.21-7.19(m,1H),6.97(t,J=7.5Hz,1H),6.83(d,J=8Hz,1H),5.54(s,1H),3.51(s,3H),1.44(s,3H)ppm;13CNMR(125MHz,CDCl3):δ=169.6,166.6,159.0,157.1,156.4,155.4,137.7,133.3,129.7,129.0(×2),128.5,125.3,124.3,122.9,121.9,120.6,118.2(×2),117.0,111.9,110.1,102.3,92.2,55.1,48.6,13.9ppm。
实施例14:(2R,3S)-3-(4-甲氧苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物14-A(1mmol,0.292g),手性方酸催化剂XII(0.02mmol,0.0090g),溶剂乙醚(2mL),加入小磁子,40℃反应5h后,得到中间体化合物14-B(0.2mmol,0.0908g);
(B)取中间体化合物14-B(0.2mmol,0.0908g),再加入碘化铜(0.4mmol,0.1268g),碳酸钙(0.6mmol,0.06g),溶剂乙醚(3mL),25℃反应24h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0687g,76%yield,99%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ7.94-7.92(dd,J1=8.5Hz,J2=1Hz,2H),7.77-7.45(dd,J1=8Hz,J2=1.5Hz,1H),7.70-7.66(m,1H),7.50-7.46(m,3H),7.39-7.36(m,1H),7.28-7.25(m,1H),7.09-7.06(m,2H),6.90-6.87(m,2H),5.25(s,1H),3.80(s,3H),1.55(s,3H)ppm;13C NMR(125MHz,CDCl3):δ169.6,166.7,159.9,158.7,157.2,155.4,137.3,133.4,129.1(×2),129.0(×2),125.7,124.9,124.3,122.9,118.7(×2),117.1,114.5(×2),111.7,103.1,92.4,55.3,53.6,14.4ppm。
实施例15:(2R,3S)-3'-甲基-1'-苯基-3-(2-甲基苯基)-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物15-A(0.2mmol,0.0552g),手性方酸催化剂VI(0.01mmol,0.0013g),溶剂异丙醚(1mL),加入小磁子,30℃反应10h后,得到中间体化合物15-B(0.2mmol,0.0876g)
(B)取中间体化合物15-B(0.2mmol,0.0876g),加入单质碘(0.1mmol,0.0106g),碳酸锂(0.2mmol,0.0148g,),溶剂乙醇(1mL),30℃反应48h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0429g,81%yield,97%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ7.91(d,J=7.5Hz,2H),7.77-7.75(dd,J1=8Hz,J2=1.5Hz,1H),7.71-7.68(m,1H),7.52-7.45(m,3H),7.39(t,J=7.5Hz,1H),7.29-7.18(m,4H),7.13(d,J=7.5Hz,1H),5.44(s,1H),2.21(s,3H),1.45(s,3H);13C NMR(125MHz,CDCl3):δ169.5,166.5,158.6,157.2,155.5,137.2,136.5,133.4,131.7,131.5,129.1(×2),128.7,128.1,126.4,125.9,124.4,123.0,118.8(×2),117.2,111.9,103.8,91.7,50.7,19.4,14.4ppm。
实施例16:(2R,3S)-3'-甲基-1'-苯基-3-(3-甲基苯基)-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物16-A(0.4mmol,0.1104g),手性方酸催化剂VI(0.02mmol,0.0026g),溶剂乙醇(3mL),加入小磁子,30℃反应5h后,得到中间体化合物16-B(0.2mmol,0.0876g)
(B)取中间体化合物16-B(0.2mmol,0.0876g),加入单质碘(0.2mmol,0.0212g),碳酸锂(0.4mmol,0.0296g,),溶剂1,1,2-三氯乙烷(2mL),30℃反应12h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0621g,81%yield,90%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ7.94-7.93,(dd,J1=8.5Hz,J2=1Hz,2H),7.78-7.76(dd,J1=8Hz,J2=1.5Hz,1H),7.71-7.67(m,1H),7.51-7.46(m,3H),7.39(t,J=8Hz,1H),7.29-7.23(m,2H),7.17(d,J=8Hz,1H),6.96(d,J=7Hz,2H),5.25(s,1H),2.32(s,3H),1.51(s,3H)ppm;13C NMR(125MHz,CDCl3):δ169.6,166.9,158.7,157.1,155.5,139.0,137.4,133.4,133.0,129.6,129.1(×3),128.6,125.8,125.1,124.4,123.0,118.8(×2),117.2,111.8,103.2,92.5,54.1,21.4,14.4ppm。
实施例17:(2R,3S)-3-(4-氟苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物17-A(0.56mmol,0.1568g),手性方酸催化剂XIII(0.03mmol,0.0139g),溶剂1,4-二氧六环(2mL),加入小磁子,-10℃反应24h后,得到中间体化合物17-B(0.2mmol,0.0884g);
(B)取中间体化合物17-B(0.2mmol,0.0884g),加入碘化钾(0.3mmol,0.0498g),1,8-二氮杂二环十一碳-7-烯(2mmol,0.304g),溶剂二甲苯(2mL),25℃反应1h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0707g,82%yield,90%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ7.94-7.92(dd,J1=9Hz,J2=1Hz,2H),7.77-7.75(dd,J1=8Hz,J2=1.5Hz,1H),7.72-7.68(m,1H),7.51-7.45(m,3H),7.41-7.38(m,1H),7.29-7.26(m,1H),7.16-7.14(m,2H),7.09-7.05(m,2H),5.27(s,1H),1.56(s,3H);13C NMR(125MHz,CDCl3):δ169.4,167.0,162.8(d,J=247.25Hz),158.6,156.8,155.5,137.2,133.7,129.7,129.6,129.1(×2),128.8(d,J=3.25Hz),125.9,124.5,123.0,118.7(×2),117.2,116.3,116.1,111.6,102.7,92.4,53.5,14.4ppm。
实施例18:(2R,3S)-3-(3-氯苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物18-A(0.2mmol,0.0592g),手性方酸催化剂XIII(0.02mmol,0.0093g),溶剂乙醇(1mL),加入小磁子,25℃反应8h后,得到中间体化合物18-B(0.2mmol,0.0816g);
(B)取中间体化合物18-B(0.2mmol,0.0816g),加入四丁基碘化铵(1mmol,0.3690g),氢氧化钠(0.8mmol,0.0672g),溶剂异丙醚(2mL),40℃反应16h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0644g,86%yield,98%ee,>99:1dr),1H NMR(500MHz,CDCl3):δ=7.93-7.91(dd,J1=9Hz,J2=1.5Hz,2H),7.78-7.70(m,2H),7.53-7.46(m,3H),7.42-7.28(m,4H),7.16(t,J=1.5Hz,1H),7.06(d,J=7.5Hz,1H),5.23(s,1H),1.56(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=169.3,167.2,158.6,156.5,155.6,137.2,135.3,135.2,133.8,130.5,129.2,129.1(×2),128.1,126.3,126.0,124.6,123.1,118.9(×2),117.3,111.6,102.4,92.3,53.7,14.5ppm。
实施例19:(2R,3S)-3-(2,4-二氯苯基)-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物19-A(0.4mmol,0.1324g),手性方酸催化剂XIII(0.04mmol,0.0186g),溶剂三氟甲苯(2mL),加入小磁子,25℃反应2h后,得到中间体化合物19-B(0.2mmol,0.0984g);
(B)取中间体化合物19-B(0.2mmol,0.0984g),加入四丁基碘化铵(1mmol,0.3690g),氢氧化钠(0.8mmol,0.0672g),溶剂1,4-二氧六环(2mL),40℃反应1h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0617g,63%yield,84%ee,>99:1dr),1H NMR(500MHz,CDCl3):δ=7.98-7.96(dd,J1=9Hz,J2=2Hz,2H),7.77-7.75(dd,J1=7.5Hz,J2=1Hz,1H),7.71-7.67(m,1H),7.51-7.46(m,3H),7.40-7.35(m,4H),7.30-7.26(m,1H),7.16-7.14(m,2H),5.31(s,1H),2.02-1.94(m,2H),1.58-1.50(m,2H),0.90(t,J=7Hz,3H)ppm;13C NMR(125MHz,CDCl3):δ=169.7,167.0,161.1,158.7,155.4,137.4,133.5,133,129.1(×2),129.0(×2),128.7,127.8(×2),125.7,124.4,122.9,118.7(×2),117.1,111.7,102.7,92.9,54.3,22.1,9.1ppm。
实施例20:(2R,3S)-3'-甲基-3-(3-硝基苯基)-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物20-A(0.8mmol,0.2456g),手性方酸催化剂X(0.05mmol,0.0055g),溶剂二甲基亚砜(1mL),加入小磁子,60℃反应10h后,得中间体化合物20-B(0.2mmol,0.0811g);
(B)取中间体化合物20-B(0.2mmol,0.0811g),加入碘化氢(2mmol,0.256g),二乙胺(0.8mmol,0.0584g),溶剂乙醚(1mL),15℃反应5h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0573g,66%yield,98%ee,>99:1dr),1H NMR(500MHz,CDCl3):δ=8.26-8.24(dd,J1=8.5Hz,J2=1.5Hz,1H),8.05(t,J=2Hz,1H),7.91-7.89(dd,J1=8.5Hz,J2=1Hz,2H),7.79-7.77(dd,J1=7.5Hz,J2=1Hz,1H),7.75-7.72(m,1H),7.59(t,J=2.5Hz,1H),7.52-7.41(m,5H),7.31-7.28(m,1H),5.31(s,1H),1.57(s,3H)ppm;13CNMR(125MHz,CDCl3):δ=169.0,167.6,158.5,156.0,155.7,148.6,137.0,135.3,134.1,134.0,130.3,129.2(×2),126.2,124.7,123.9,123.1,122.9,118.9(×2),117.4,111.5,101.7,92.2,53.7,14.5ppm。
实施例21:(2R,3S)-3'-甲基-1'-苯基-3-(3-三氟甲基苯基)-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物21-A(0.5mmol,0.1650g),手性方酸催化剂VI(0.02mmol,0.0026g),溶剂N,N-二甲基甲酰胺(1mL),加入小磁子,30℃反应5h后,得到中间体化合物21-B(0.2mmol,0.0984g);
(B)取中间体化合物21-B(0.2mmol,0.0984g),加入单质碘(0.2mmol,0.0212g),碳酸锂(0.4mmol,0.0296g),溶剂三氟甲苯(2mL),30℃反应12h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0862g,88%yield,96%ee,>20:1dr),1HNMR(500MHz,CDCl3):δ7.93-7.91(m,2H),7.77-7.76(dd,J1=7.5Hz,J2=1.5Hz,1H),7.73-7.69(m,1H),7.52-7.46(m,4H),7.42-7.38(m,1H),7.31-7.24(m,3H),7.11(d,J=7.5Hz,1H),5.22(s,1H),1.57(s,3H)ppm;13C NMR(125MHz,CDCl3):δ169.2,167.2,158.6,156.5,155.5,137.2,135.5,133.8,132.1,131.0,130.8,129.1(×2),126.8,126.0,124.5,123.4,123.1,118.9(×2),117.3,111.6,102.3,92.3,53.6,14.5ppm。
实施例22:(2R,3S)-3'-乙基-1',3-二-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基香豆素(0.2mmol,0.0324g),吡唑烯酮类化合物22-A(0.2mmol,0.0552g),手性方酸催化剂X(0.1mmol,0.0109g),溶剂异丙醇(2mL),加入小磁子,25℃反应5h后,得到中间体化合物22-B(0.2mmol,0.0876g);
(B)取中间体化合物22-B(0.2mmol,0.0876g),再加入碘化亚铜(0.4mmol,0.076g),碳酸钾(0.6mmol,0.0828g),溶剂二甲基亚砜(2mL),25℃反应8h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0819g,97%yield,98%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ=7.98-7.96(dd,J1=9Hz,J2=2Hz,2H),7.77-7.75(dd,J1=7.5Hz,J2=1Hz,1H),7.71-7.67(m,1H),7.51-7.46(m,3H),7.40-7.35(m,4H),7.30-7.26(m,1H),7.16-7.14(m,2H),5.31(s,1H),2.02-1.94(m,2H),1.58-1.50(m,2H),0.90(t,J=7Hz,3H);13C NMR(125MHz,CDCl3):δ=169.7,167.0,161.1,158.7,155.4,137.4,133.5,133,129.1(×2),129.0(×2),128.7,127.8(×2),125.7,124.4,122.9,118.7(×2),117.1,111.7,102.7,92.9,54.3,22.1,9.1ppm。
实施例23:(2R,3S)-3-(4-氯苯基)-7-甲氧基-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基-7-甲氧基-香豆素(0.2mmol,0.0384g),吡唑烯酮类化合物23-A(0.3mmol,0.0888g),手性方酸催化剂IX(0.006mmol,0.0028g),溶剂乙酸乙酯(3mL),加入小磁子,-20℃反应1h后,得中间体化合物23-B(0.2mmol,0.0978g);
(B)取中间体化合物23-B(0.2mmol,0.0978g),加入碘化氢(2mmol,0.256g),二乙胺(0.8mmol,0.0584g),溶剂异丙醇(3mL),30℃反应18h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0828g,85%yield,93%ee,>99:1dr),1H NMR(500MHz,CDCl3):δ=7.93-7.91(m,2H),7.65-7.63(m,1H),7.48-7.44(m,2H),7.35-7.32(m,2H),7.29-7.25(m,1H),7.12-7.09(m,2H),6.96-6.94(m,2H),5.22(s,1H),3.93(s,3H),1.56(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=169.4,167.5,164.4,159.0,157.6,156.8,137.3,134.8,131.8,129.3(×4),129.1(×2),125.9,124.1,118.7(×2),113.1,104.8,101.0,99.2,92.4,56.0,53.5,14.5ppm。
实施例24:(2R,3S)-3-(4-溴苯基)-7-甲氧基-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基-7-甲氧基-香豆素(0.2mmol,0.0384g),吡唑烯酮类化合物24-A(0.3mmol,0.1599g),手性方酸催化剂IX(0.003mmol,0.0014g),溶剂异丙醇(3mL),加入小磁子,-10℃反应15h后,得中间体化合物24-B(0.2mmol,0.1066g);
(B)取中间体化合物24-B(0.2mmol,0.1066g),加入碘化氢(2mmol,0.256g),二乙胺(0.4mmol,0.0297g),溶剂N,N-二甲基甲酰胺(3mL),25℃反应18h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0828g,89%yield,91%ee,>99:1dr),1H NMR(500MHz,CDCl3):δ=7.93-7.91(dd,J1=8.5Hz,J2=1Hz,2H),7.64(d,J=8.5Hz,1H),7.50-7.45(m,4H),7.29-7.26(dd,J1=7.5Hz,J2=6Hz,1H),7.05(d,J=8Hz,2H),6.97-6.94(m,2H),5.20(s,1H),3.93(s,3H),1.57(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=169.4,167.5,164.4,159.0,157.6,156.8,137.3,132.3(×3),129.6(×2),129.1(×2),125.9,124.0,122.9,118.7(×2),113.1,104.8,101.0,99.1,92.3,55.9,53.5,14.5ppm。实施例20:(2R,3S)-3'-甲基-3-(2-硝基苯基)-7-甲氧基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基-7-甲氧基-香豆素(0.2mmol,0.0384g),吡唑烯酮类化合物25-A(0.8mmol,0.2456g),手性方酸催化剂X(0.05mmol,0.0055g),溶剂三氟甲苯(1mL),加入小磁子,30℃反应10h后,得中间体化合物25-B(0.2mmol,0.0998g);
(B)取中间体化合物25-B(0.2mmol,0.0998g),加入碘化氢(2mmol,0.256g),二乙胺(0.8mmol,0.0584g),溶剂乙醚(1mL),15℃反应5h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0726g,73%yield,99%ee,>99:1dr),1H NMR(500MHz,CDCl3):δ=8.03-8.00(dd,J1=8.5Hz,J2=1.5Hz,1H),7.70-7.64(m,4H),7.52-7.48(m,1H),7.45-7.43(dd,J1=7.5Hz,J2=1Hz,1H),7.36-7.33(m,2H),7.19-7.16(m,1H),7.00-6.97(m,2H),5.46(s,1H),3.95(s,3H),2.30(s,3H)ppm;13C NMR(125MHz,CDCl3):δ=167.8,165.3,164.7,158.8,157.6,156.6,148.1,137.1,133.6,131.6,129.6,129.3,128.8(×2),125.6,125.3,124.3,119.1(×2),113.3,104.5,101.2,99.6,91.4,56.0,46.9,12.7ppm。实施例26:(2R,3S)-3-(2-甲氧苯基)-3'8-二甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基-6-甲基-香豆素(0.2mmol,0.0352g),吡唑烯酮类化合物26-A(1mmol,0.292g),手性方酸催化剂V(0.05mmol,0.0051g),溶剂二氯甲烷(3mL),加入小磁子,25℃反应1h后,得到中间体化合物26-B(0.2mmol,0.096g);
(B)取中间体化合物26-B(0.2mmol,0.0936g),再加入醋酸碘苯(0.4mmol,0.1288g),三乙烯二胺(0.6mmol,0.0606g),溶剂二甲苯(3mL),0℃反应48h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0932g,64%yield,99%ee,>99:1dr),1H NMR(500MHz,CDCl3):δ7.98-7.96(dd,J1=8.5Hz,J2=1Hz,2H),7.53(s,1H),7.48-7.44(m,3H),7.38(d,J=8.5Hz,1H),7.33-7.30(m,1H),7.28-7.23(dd,J1=15Hz,J2=8Hz,1H),7.20-7.18(dd,J1=7.5Hz,J2=1Hz,1H),6.96(t,J=7.5Hz,1H),6.82(d,J=8Hz,1H),5.52(s,1H),3.51(s,3H),2.44(s,3H),1.44(s,3H);13C NMR(125MHz,CDCl3):δ169.6,166.6,159.2,157.1,156.4,153.7,137.7,134.4,134.2,129.7,129.0(×2),128.5,125.3,122.5,122.0,120.6,118.2(×2),116.8,111.6,110.0,102.2,92.2,55.1,48.6,20.8,13.9ppm。
实施例27:(2R,3S)-3-(3-氟苯基)-3'8-二甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基-6-甲基-香豆素(0.2mmol,0.0352g),吡唑烯酮类化合物27-A(0.56mmol,0.1568g),手性方酸催化剂XIII(0.03mmol,0.0139g),溶剂1,4-二氧六环(2mL),加入小磁子,0℃反应24h后,得到中间体化合物27-B(0.2mmol,0.0912g);
(B)取中间体化合物27-B(0.2mmol,0.0912g),加入碘化钾(0.3mmol,0.0498g),1,8-二氮杂二环十一碳-7-烯(0.4mmol,0.0608g),溶剂二甲苯(2mL),25℃反应1h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0627g,69%yield,94%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ7.93-7.91(dd,J1=8.5Hz,J2=1Hz,2H),7.56(s,1H),7.50-7.45(m,3H),7.40(d,J=8.5Hz,1H),7.37-7.32(m,1H),7.29-7.26(m,1H),708-7.05(m,1H),6.96(d,J=7.5Hz,1H),6.90-6.87(m,1H),5.25(s,1H),2.46(s,3H),1.55(s,3H);13C NMR(125MHz,CDCl3):δ169.3,167.2,163.1(d,J=247Hz),158.8,156.6,153.7,137.2,135.7(d,J=6.875Hz),134.8,134.5,130.8(d,J=8.25Hz),129.1(×2),125.9,123.8(d,J=2.875Hz),122.6,118.8(×2),116.9,115.9(d,J=20.875Hz),115.2(d,J=22.25Hz),111.3,102.3,92.2,53.6,20.8,14.3ppm。实施例28:(2R,3S)-3-(4-氯苯基)-3'8-二甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基-甲基-香豆素(0.2mmol,0.0352g),吡唑烯酮类化合物28-A(0.2mmol,0.0592g),手性方酸催化剂XIII(0.02mmol,0.0093g),溶剂乙醇(1mL),加入小磁子,25℃反应8h后,得到中间体化合物28-B(0.2mmol,0.0938g);
(B)取中间体化合物28-B(0.2mmol,0.0938g),加入四丁基碘化铵(1mmol,0.3690g),氢氧化钠(0.8mmol,0.0672g),溶剂二甲苯(2mL),20℃反应16h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0600g,64%yield,87%ee,>99:1dr),1H NMR(500MHz,CDCl3):δ=7.93-7.91(dd,J1=8Hz,J2=1Hz,2H),7.55(s,1H),7.51-7.45(m,3H),7.39(d,J=8.5Hz,1H),7.35-7.33(dd,J1=7Hz,J2=2Hz,2H),7.29-7.26(dd,J1=7Hz,J2=6.5Hz,1H),7.10(d,J=8Hz,2H),5.25(s,1H),2.45(s,3H),1.57(s,3H);13CNMR(125MHz,CDCl3):δ169.3,167.1,158.8,156.7,153.7,137.2,134.8,134.4,131.6,129.3(×3),129.0(×3),125.8,122.6,118.7(×3),116.9,111.2,102.2,92.3,53.5,20.8,14.4ppm。
实施例29:(2R,3S)-3-(3-硝基苯基)-3'8-二甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基-6-甲基香豆素(0.2mmol,0.0352g),吡唑烯酮类化合物29-A(0.4mmol,0.1228g),手性方酸催化剂XIII(0.04mmol,0.0186g),溶剂三氟甲苯(2mL),加入小磁子,25℃反应2h后,得到中间体化合物29-B(0.2mmol,0.0958g);
(B)取中间体化合物29-B(0.2mmol,0.0958g),加入四丁基碘化铵(1mmol,0.3690g),氢氧化钠(0.8mmol,0.0672g),溶剂1,4-二氧六环(2mL),40℃反应1h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0651g,68%yield,99%ee,>99:1dr),1H NMR(500MHz,CDCl3):δ=8.25-8.22(m,1H),8.05(t,J=2Hz,1H),7.91-7.89(m,2H),7.59-7.56(dd,J1=10.5Hz,J2=8Hz,2H),7.54-7.52(m,2H),7.49-7.45(m,2H),7.42(d,J=8.5Hz,1H),7.31-7.27(m,1H),5.35(s,1H),2.47(s,3H),1.56(s,3H);13CNMR(125MHz,CDCl3):δ169.0,167.6,158.7,156.0,153.9,148.6,137.0,135.4,135.2,134.7,134.1,130.3,129.1(×2),126.1,123.8,122.9,122.7,118.9(×2),117.1,111.1,101.5,92.2,53.7,20.8,14.5ppm。
实施例30:(2R,3S)-3-(3-硝基苯基)-8-氯-3'-甲基-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基-6-氯-香豆素(0.2mmol,0.0392g),吡唑烯酮类化合物30-A(0.8mmol,0.2728g),手性方酸催化剂X(0.05mmol,0.0055g),溶剂二甲基亚砜(1mL),加入小磁子,50℃反应10h后,得中间体化合物30-B(0.2mmol,0.1068g);
(B)取中间体化合物30-B(0.2mmol,0.1068g),加入碘化氢(2mmol,0.256g),二乙胺(0.8mmol,0.0584g),溶剂乙醚(1mL),15℃反应5h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0844g,79%yield,91%ee,>99:1dr),1H NMR(500MHz,CDCl3):δ7.91-7.89(dd,J1=8.5Hz,J2=1Hz,2H),7.75(d,J=2.5Hz,1H),7.65-7.63(dd,J1=9Hz,J2=2.5Hz,1H),7.52-7.44(m,4H),7.30-7.24(m,3H),7.08(d,J=8Hz,1H),5.21(s,1H),1.55(s,3H);13C NMR(125MHz,CDCl3):δ169.0,166.0,157.9,156.2,153.8,137.1,135.2,133.7,132.2,130.9,130.8,130.1,129.1(×2),126.7,126.0,123.4,122.5,118.9(×2),118.7,112.7,103.4,92.4,53.5,14.4ppm。
实施例31:(2R,3S)-8-氯-3'-甲基-3-(3-硝基苯基)-1'-苯基-3H,4H-螺[呋喃并[3,2-c]色烯-2,4'-吡唑]-4,5'(1'H)-二酮的合成;
(A)取干净10mL小试管,加入4-羟基6-氯-香豆素(0.2mmol,0.0392g),吡唑烯酮类化合物31-A(0.4mmol,0.1228g),手性方酸催化剂X(0.1mmol,0.0109g),溶剂甲苯(1mL),加入小磁子,20℃反应15h后,得中间体化合物31-B(0.2mmol,0.1g);
(B)取中间体化合物31-B(0.2mmol,0.1g),加入碘化氢(2mmol,0.256g),二乙胺(0.8mmol,0.0584g),溶剂乙腈(1mL),40℃反应20h后,用乙酸乙酯(3×10mL)萃取,有机相减压脱溶,用乙酸乙酯:石油醚=1:10混合溶剂为洗脱剂;200-300目柱层层析硅胶为填料,柱层析分离提纯得到的目标产物(0.0643g,64%yield,96%ee,>20:1dr),1H NMR(500MHz,CDCl3):δ8.25-8.23(dd,J1=8.5Hz,J2=1.5Hz,1H),8.03(s,1H),7.88(d,J=7.5Hz,2H),7.76(d,J=2.5Hz,1H),7.67-7.65(dd,J1=9Hz,J2=2.5Hz,1H),7.58(t,J=8Hz,1H),7.50-7.45(m,4H),7.30-7.27(dd,J1=10.5Hz,J2=7.5Hz,1H),5.35(s,1H),1.55(s,3H);13C NMR(125MHz,CDCl3):δ168.7,166.4,157.9,155.6,153.9,148.6,136.9,135.1,134.1,134.0,130.4,130.2,129.1(×2),126.2,124.0,122.8,122.6,118.9(×2),118.8,112.5,102.7,92.2,53.6,14.5ppm。

Claims (9)

1.一种如式(I)所示的手性呋喃并[3,2-c]色烯类化合物的不对称合成方法,其特征在于,所述的合成方法按如下步骤进行:
(A)以式(II)所示4-羟基香豆素类化合物和式(III)所示吡唑烯酮类化合物为原料,在手性方酸催化剂作用下,在有机溶剂A中混合均匀,在-20~60℃下反应0.1~48h,反应结束后,将反应液蒸除溶剂得到式(IV)所示的化合物;所述的式(II)所示4-羟基香豆素类化合物和式(III)所示吡唑烯酮类化合物、手性方酸催化剂的物质的量之比为1:1~10:0.01~0.3;
(B)向步骤(A)中制得所得的式(IV)所示化合物中,加入碘源添加剂、碱性物质,在有机溶剂B中混合均匀,在-20~60℃下反应0.1~48h,反应结束后,反应液经后处理得到式(I)所示的手性呋喃并[3,2-c]色烯类化合物;所述的式(IV)所示化合物和碘源添加剂、碱的物质的量之比为1:0.5~10:1~10,
所述式(I)、式(II)、式(III)和式(IV)中,
所述R1为氢、C1~C20烷基、甲氧基、硝基、氰基、氟、氯、溴、2-甲氧基苯基、3-甲氧基苯基、4-甲氧基苯基、2-甲基苯基、3-甲基苯基、4-甲基苯基、2-硝基苯基、3-硝基苯基、4-硝基苯基、2,2,2-三氟乙基、苯基、2-氟苯基、3-氟苯基、4-氟苯基、2-氯苯基、3-氯苯基、4-氯苯基、2-溴苯基、3-溴苯基、4-溴苯基、苄基、2-氟苄基、3-氟苄基、4-氟苄基、2-氯苄基、3-氯苄基、4-氯苄基、2-溴苄基、3-溴苄基、4-溴苄基、2-三氟甲基苯基、3-三氟甲基苯基、4-三氟甲基苯基、呋喃基、噻吩基或3,5-二-三氟甲基苯基;
所述R2、R4各自独立为氢、C1~C20烷基、2-甲氧基苯基、3-甲氧基苯基、4-甲氧基苯基、2-甲基苯基、3-甲基苯基、4-甲基苯基、2-硝基苯基、3-硝基苯基、4-硝基苯基、2,2,2-三氟乙基、苯基、2-氟苯基、3-氟苯基、4-氟苯基、2-氯苯基、3-氯苯基、4-氯苯基、2,4-二氯苯基、2-溴苯基、3-溴苯基、4-溴苯基、苄基、2-氟苄基、3-氟苄基、4-氟苄基、2-氯苄基、3-氯苄基、4-氯苄基、2-溴苄基、3-溴苄基、4-溴苄基、2-三氟甲基苯基、3-三氟甲基苯基、4-三氟甲基苯基、呋喃基、噻吩基或3,5-二-三氟甲基苯基;
所述R3为C1~C20烷基;
所述的手性方酸催化剂选自式(V)~(XIII)所示化合物之一:
2.如权利要求1所述的手性呋喃并[3,2-c]色烯类化合物的不对称合成方法,其特征在于步骤(A),所述有机溶剂A的体积用量以式(II)所示4-羟基香豆素类化合物的物质的量计为0.5~15mL/mmol。
3.如权利要求1所述的手性呋喃并[3,2-c]色烯类化合物的不对称合成方法,其特征在于步骤(B)中,所述的碘源添加剂为碘化钾、碘化钠、碘化铜、碘化亚铜、四丁基碘化铵、碘单质、碘化氢或醋酸碘苯。
4.如权利要求1所述的手性呋喃并[3,2-c]色烯类化合物的不对称合成方法,其特征在于步骤(B)中,所述的碘源添加剂为碘单质。
5.如权利要求1所述的手性呋喃并[3,2-c]色烯类化合物的不对称合成方法,其特征在于步骤(B)中,所述的碱性物质为氢氧化钠、氢氧化钾、碳酸氢钠、碳酸钾、碳酸钙、碳酸钠、碳酸锂、碳酸铯、三乙烯二胺、二乙胺、三乙胺、1,8-二氮杂二环十一碳-7-烯、吡啶、4-二甲氨基吡啶、N-甲基吗啉、四甲基乙二胺、叔丁醇钾或正丁基锂。
6.如权利要求1所述的手性呋喃并[3,2-c]色烯类化合物的不对称合成方法,其特征在于步骤(B)中,所述的碱性物质为三乙烯二胺。
7.如权利要求1所述的手性呋喃并[3,2-c]色烯类化合物的不对称合成方法,其特征在于步骤(B)中,所述有机溶剂B的体积用量以步骤(A)所得化合物(IV)的物质的量计为0.5~15mL/mmol。
8.如权利要求1所述的手性呋喃并[3,2-c]色烯类化合物的不对称合成方法,其特征在于步骤(A)和步骤(B)中,所述的有机溶剂各自独立为二氯甲烷、氯仿、1,2-二氯乙烷、1,1,2-三氯乙烷、乙醚、异丙醚、四氢呋喃、1,4-二氧六环、乙酸乙酯、甲苯、二甲苯、三氟甲苯、二甲基亚砜、N,N-二甲基甲酰胺、乙腈、甲醇、乙醇或异丙醇。
9.如权利要求1所述的手性呋喃并[3,2-c]色烯类化合物的不对称合成方法,其特征在于步骤(B)中,所述反应液后处理的方法为:反应结束后,反应液用乙酸乙酯萃取,萃取液蒸馏脱除溶剂后,剩余物用200~300目硅胶进行柱层析分离,洗脱剂为乙酸乙酯与石油醚体积比1:2~70的混合液,收集含目标化合物的洗脱液,蒸除溶剂并干燥,即得式(I)所示的手性呋喃并[3,2-c]色烯类化合物。
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