CN104817591B - 一种手性叔膦化合物及其全构型、其制备方法和应用 - Google Patents

一种手性叔膦化合物及其全构型、其制备方法和应用 Download PDF

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CN104817591B
CN104817591B CN201510107308.0A CN201510107308A CN104817591B CN 104817591 B CN104817591 B CN 104817591B CN 201510107308 A CN201510107308 A CN 201510107308A CN 104817591 B CN104817591 B CN 104817591B
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CN104817591A (zh
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张俊良
宿晓
周伟
李杨燕
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Suzhou Kerroli New Material Technology Co., Ltd.
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East China Normal University
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Abstract

本发明提供一种式(1)所示的含有手性亚磺酰胺类手性叔膦化合物的制备方法,以醛(酮)2和手性亚磺酰胺3为原料,与亲核试剂R2PCH2M(M=Li,K,Mgx,ZnX等)反应制得式(1)化合物。根据使用不同手性亚磺酰胺和不同的反应试剂,可制备得到包括(S,RS)、(R,RS)、(S,SS)或(R,RS)四种构型的光学纯化合物。所述化合物配体骨架简单、合成方便、易于改造,且可应用于各种叔膦催化的不对称反应中具有很高的反应活性和立体选择性,具有很好的应用前景。

Description

一种手性叔膦化合物及其全构型、其制备方法和应用
技术领域
本发明涉及一种化工技术领域的配体或催化剂及其制备方法,具体涉及一种新型手性膦化合物以及其全构型、以及其制备方法和应用。
背景技术
通过不对称催化的方式可以得到单一对应异构体的手性药物,即可以由少量手性催化剂制备得到大量手性化合物,较少甚至避免无效体的生成,既有利于环境保护,又能达到好的原子经济性,还可以避开对外消体的繁琐拆分,设计和合成高选择性和高催化活性的手性催化剂是不对称合成的关键所在。
手性叔膦化合物是一类非常重要的手性催化剂或配体,其在过渡金属催化和叔膦催化的不对称反应中应用十分广泛。早在上世纪六十年代,科学家们就开始了对手性叔膦化合物的研究,到目前已经合成众多手性的膦配体或催化剂。同时,含不同手性的化合物,其每一种立体构型异构体通常表现出不同催化活性、生物活性和医疗作用。因此,在有机合成、制药、医疗和生物中,一种潜手性化合物全部立体构型异构体的获得就显得十分重要。目前,全构型化合物的合成还是一个难题,其获取主要通过手性拆分和用相反构型的配体不对称合成等方法来实现。很多配体的对映异构体的合成还是一个难题。
大多数手性叔膦化合物因为手性骨架较为复杂,就存在原料昂贵、合成路线长、产率低、改造难等不同程度的难题。因此,寻找一种原料低廉、环境友好、易于改造、便于高效合成全构型配体的体系具有非常好的应用前景。传统的合成此种化合物的方法主要是从天然手性氨基酸出发,至少经过六步以上才能合成单一手性构型的叔膦化合物。这种方法不仅步骤长,总产率较低,而且合成全部构型异构体时存在较大的困难,需要建立在不同手性构型的原料基础之上。现有技术合成含膦类化合物,存在原料较贵、合成路线长、产率低、反应时间较长等缺陷。我们致力于发展以商业化的、价格低廉原料出发,通过简短的合成步骤,方便、高效的合成全部立体构型化合物的方法。
发明内容
本发明克服现有技术上述不足,提供了一种原料低廉、易于改造、便于高效合成全构型配体的合成体系,提供了种新型手性膦化合物及其全构型、以及其制备方法。本发明中,使用不同的膦试剂就可高效、高选择性、低成本、绿色环保的制备全部立体构型的手性膦化合物。
本发明提出一种新的手性膦化合物,其含有手性亚磺酰胺,其结构通式如下式(1)所示:
式(1)中:R=芳基、脂肪取代基;R1=芳基、脂肪取代基;R2=氢、芳基、脂肪取代基;R3=芳基、脂肪取代基;其中,所述芳基包括取代芳基,杂芳基;所述脂肪取代基包括烷基、环烷基。
优选地,R=芳基;R1=芳基,烷基(1-10个碳原子);R2=氢,烷基(1-10个碳原子);R3=烷基,叔丁基。
所述式(1)手性膦化合物具有稳定的手性。
所述式(1)手性膦化合物,经过硅胶柱纯化后,得到1(S,RS)、(R,RS)、(S,SS)和(R,SS)四种构型的光学纯化合物,其四种构型的结构通式如下:
其中:R=芳基、脂肪取代基;R1=芳基、脂肪取代基;R2=氢、芳基、脂肪取代基;R3=芳基、脂肪取代基;其中,所述芳基包括取代芳基,杂芳基;所述脂肪取代基包括烷基、环烷基。
优选地,R=芳基;R1=芳基,烷基(1-10个碳原子);R2=氢,烷基(1-10个碳原子);R3=烷基,叔丁基。
进一步地,R=苯基;R1=苯基,2-萘基,异丙基,环己基,金刚烷基,3,4,5,-三甲氧基苯基,2-呋喃,2-噻吩,2-(三异丙基硅氧基)-苯基,2-(二甲基叔丁基硅氧基)-苯基,2-(二苯基叔丁基硅氧基)-苯基,2-(三乙基硅氧基)-苯基,邻羟基苯基;R2=氢;R3=叔丁基。
本发明提供了以上手性膦化合物的制备方法,包括以下:
合成路线如下:
第一步:醛(酮)2与不同手性亚磺酰胺3(RS)、3(SS)反应生成手性的亚磺酰亚胺4(RS)、4(SS);
第二步:再与不同的含膦金属试剂反应,得到四种立体构型的手性膦化合物1(S,RS)、(R,RS)、(S,SS)和(R,SS);
其中,R=芳基、脂肪取代基;R1=芳基、脂肪取代基;R2=氢、芳基、脂肪取代基;R3=芳基、脂肪取代基;其中,所述芳基包括取代芳基,杂芳基;所述脂肪取代基包括烷基、环烷基。
优选地,R=芳基;R1=芳基,烷基(1-10个碳原子);R2=氢,烷基(1-10个碳原子);R3=烷基,叔丁基。
进一步地,R=苯基;R1=苯基,2-萘基,异丙基,环己基,金刚烷基,3,4,5,-三甲氧基苯基,2-呋喃,2-噻吩,2-(三异丙基硅氧基)-苯基,2-(二甲基叔丁基硅氧基)-苯基,2-(二苯基叔丁基硅氧基)-苯基,2-(三乙基硅氧基)-苯基,邻羟基苯基;R2=氢;R3=叔丁基。
所述第一步中,所述式(2)所示的醛(酮)、式(3(RS))或式(3(SS))所示的手性亚磺酰胺、缩合剂之间的摩尔比为1:1~10:1~15。
本发明制备方法中,所述第一步中,反应温度为‐30~100℃;反应时间为0.5~48h。
本发明制备方法中,所述第一步中,所用有机溶剂可以是二氯甲烷、乙酸乙酯、四氢呋喃、乙醚、乙二醇二甲醚、二氧六环、甲苯、苯、氯仿、或其混合溶剂。
所述第一步中,反应中所用的缩合剂可以是DCC、DIC、EDCI、氧化钙、五氧化二磷、二氧化硅、分子筛、无水硫酸铜、钛酸酯、硅酸酯、无水硫酸镁、无水硫酸钠。
本发明制备方法中,所述第二步中,所述式(4(RS))或式(4(SS))所示的手性亚磺酰亚胺与含膦金属试剂的摩尔比为1:1~10。
所述第二步中,反应温度为-100~50℃;反应时间为0.1~48h。
所述第二步中,所述有机溶剂可以是二氯甲烷、乙酸乙酯、四氢呋喃、乙醚、乙二醇二甲醚、二氧六环、甲苯、苯、氯仿、或其混合溶剂。
所述第二步中,反应中所用的含膦金属试剂可以是二芳基亚甲基膦金属试剂、二取代芳基亚甲基膦金属试剂、二烷基亚甲基膦金属试剂、芳基烷基亚甲基膦金属试剂、或者由相应的锂试剂与其他金属盐MX进行交换制备得到的含膦金属试剂。
本发明还提供了所述式(1)手性膦化合物在不对称分子内环化反应中的应用,反应式如下:
其中,R=芳基、脂肪取代基;R1=芳基、脂肪取代基;R2=氢、芳基、脂肪取代基;R3=芳基、脂肪取代基;R4=氢、芳基、脂肪取代基;其中,所述芳基包括取代芳基、杂芳基;所述脂肪取代基包括烷基、环烷基;其中,1表示所述式(1)手性膦化合物。
其中,所述分子内不对称反应包括环化反应。
本发明提供一种中心手性亚磺酰胺类单膦配体及其制备方法,本发明以不同结构的醛(酮)2和手性亚磺酰胺3为原料,与亲核试剂或还原试剂反应制得化合物式(1);根据使用不同手性亚磺酰胺和不同的亲核试剂,可以方便地得到(S,RS)、(R,RS)、(S,SS)和(R,SS)四种构型的光学纯化合物。该类化合物骨架简单、合成方便、易于改造,且可应用于各种叔膦催化的不对称反应,具有很高的反应活性和立体选择性,具有很好的应用前景。
具体实施方式
下面对本发明以具体实施例作详细说明,本实施例是在以本发明的技术说明为前提下进行实施,以下实施例有助于理解本发明,但本发明不局限于以下实施例的内容。
实施例1
(S)-N-((RS)-2-(diphenylphosphino)-1-phenylethyl)-2-methylpropane-2-sulfinamide[1a(S,RS)]的合成
其中,THF为四氢呋喃;N2为氮气;Ti(iPrO)4为钛酸四异丙酯。
第一步:在一个500mL的三颈瓶,加入苯甲醛(50mmol)和(R)-(+)-叔丁基亚磺酰胺(50mmol),在氮气的氛围下加入150mL四氢呋喃,加钛酸四异丙酯(100mmol),在50℃下搅拌10h,产率为85%。
第二步:将第一步制备的亚胺(1.04g,5mmol)加入50mL的茄形反应瓶中,氮气保护,加入30mL四氢呋喃。在室温下,缓慢加入二苯基亚甲基膦锂(10mmol),搅拌过夜,产率为71%。氢谱核磁(400MHz,CDCl3)δ7.45-7.41(m,2H),7.36-7.28(m,7H),7.27-7.25(m,6H),4.48-4.41(m,1H),3.63(d,J=4.4Hz,1H),2.89(dd,J=13.8,6.8Hz,1H),2.50(dd,J=13.8,8.0Hz,1H),1.19(s,9H).碳谱核磁(100MHz,CDCl3)δ142.08(d,JC,P=44Hz),138.10(d,JC,P=12.9Hz),137.51(d,JC,P=13Hz),132.78(d,JC,P=5.8Hz),132.59(d,JC,P=5.8Hz),128.79,128.62,128.60,128.54(d,JC,P=2.3Hz),128.35(d,JC,P=6.7Hz),128.04,127.12(d,JC,P=1Hz),57.56(d,JC,P=19Hz),56.02,37.47(d,JC,P=14Hz),22.52;膦谱核磁(162MHz,CDCl3)δ=-24.00ppm.高分辨率质谱理论数据C24H29NOPS:m/z(%):410.1702(M+H+),实验数据:410.1687.
实施例2
(S)-N-((RS)-2-(diphenylphosphino)-1-(naphthalen-2-yl)ethyl)-2-methylpropane-2-sulfinamide[1b(S,RS)]的合成。
具体操作参考实施例1,所用原料为(R)-(+)-叔丁基亚磺酰胺,亲核试剂为二苯基亚甲基膦锂,总产率为70%。氢谱核磁(400MHz,CDCl3)δ7.79-7.75(m,3H),7.70(s,1H),7.46-7.39 (m,5H),7.36-7.27(m,5H),7.21-7.18(m,3H),4.66-4.59(m,1H),3.71(d,J=4.3Hz,1H),2.98(dd,J=13.8,6.8Hz,1H),2.62(dd,J=13.8,8.0Hz,1H),1.20(s,9H).碳谱核磁(100MHz,CDCl3)δ139.25(d,JC,P=4.4Hz),138.02(d,JC,P=12.7Hz),137.52(d,JC,P=12.9Hz),133.13(d,JC,P=5.8Hz),132.83(d,JC,P=3.1Hz),132.64(d,JC,P=3.5Hz),128.81,128.62,128.55,128.32(d,JC,P=6.7Hz),128.02,126.40(d,JC,P=1.1Hz),126.11(d,JC,P=9.9Hz),124.77,57.73(d,JC,P=19.6Hz),56.08,37.16(d,JC,P=14.4Hz),22.56;膦谱核磁(162MHz,CDCl3)δ=-23.88ppm.高分辨质谱理论数据C28H31NOPS:m/z(%):460.1858(M+H+),实验数据:460.1827.
实施例3
(S)-N-((RS)-1-(diphenylphosphino)-3-methylbutan-2-yl)-2-methylpropane-2-sulfinamide[1c(S,RS)]的合成
具体操作参考实施例1,所用原料为(R)‐(+)‐叔丁基亚磺酰胺,亲核试剂为二苯基亚甲基膦锂,总产率为78%。氢谱核磁(400MHz,C6D6)δ7.47-7.43(m,4H),7.16-7.03(m,6H),3.34-3.24(m,2H),2.25-2.16(m,3H),1.09(s,9H),0.87(d,J=6.8Hz,3H),0.72(d,J=6.9Hz,3H).碳谱核磁(100MHz,C6D6)δ139.79(d,JC,P=13.9Hz),139.10(d,JC,P=15.3Hz),133.62(d,JC,P=19.8Hz),132.66(d,JC,P=18.3Hz),129.08,128.81(d,JC,P=6.9Hz),128.74(d,JC,P=6.2Hz),128.55,60.41,56.02,33.44(d,JC,P=6.9Hz),32.24(d,JC,P=13.85Hz),22.69,18.27,17.32;膦谱核磁(162MHz,C6D6)δ=-9.05ppm.高分辨质朴理论数据C21H31NOPS:m/z(%):376.1858(M+H+),实验数据:376.1859.
实施例4
(S)-N-((RS)-1-cyclohexyl-2-(diphenylphosphino)ethyl)-2-methylpropane-2-sulfinamide[1d(S,RS)]的合成
具体操作参考实施例1,所用原料为(R)‐(+)‐叔丁基亚磺酰胺,亲核试剂为二苯基亚甲基膦锂,总产率为65%。氢谱数据(400MHz,C6D6)δ7.49-7.44(m,4H),7.14-7.04(m,6H),3.44(d,J=8.6Hz,1H),3.31-3.24(m,1H),2.31-2.18(m,2H),1.90-1.83(m,1H),1.66-1.50(m,5H),1.25-1.17(m,1H),1.10(s,9H),1.06-0.99(m,3H),0.96-0.86(m,1H);碳谱数据(100MHz,C6D6)δ139.97(d,JC,P=14.2Hz),139.09(d,JC,P=15.4Hz),133.68(d,JC,P=19.9Hz),129.09,128.81(d,JC,P=6.8Hz),128.72(d,JC,P=6.1Hz),128.51,60.14(d,JC,P=13.3Hz),56.05,43.81(d,JC,P=6.7Hz),33.11(d,JC,P=13.7Hz),29.22,28.17,26.74,26.52(d,JC,P=7.9Hz),22.78(d,JC,P=0.9Hz);膦谱数据(162MHz,C6D6)δ=-9.10ppm.高分辨质谱理论数据C24H35NOPS:m/z(%):416.2171(M+H+),实验数据:416.2173.
实施例5
(S)-N-((RS)-1-((3S,5S,7S)-adamantan-1-yl)-2-(diphenylphosphino)ethyl)-2-methylpropane-2-sulfinamide[1e(S,RS)]的合成
具体操作参考实施例1,所用原料为(R)-(+)-叔丁基亚磺酰胺,亲核试剂为二苯基亚甲基膦锂,总产率为60%。氢谱核磁(400MHz,CDCl3)δ7.48-7.44(m,2H),7.36-7.27(m,8H),3.42(d,J=7.9Hz,1H),2.82-2.74(m,1H),2.55-2.50(m,1H),1.98-1.91(m,4H),1.76-1.44(m,12H),1.27(s,9H);碳谱核磁(100MHz,CDCl3)δ140.00(d,JCP=13.9Hz),137.65(d,JCP=15.7Hz),133.94(d,JCP=20.2Hz),131.91(d,JC,P=17.9Hz),129.14,128.50(d,JCP=7.2Hz),128.33(d,JC,P=5.7Hz),127.98,63.46(d,JC,P=11.6Hz),57.10,38.81,36.86(d,JC,P=5.8Hz),36.77,32.11(d,JC,P=13.1Hz),28.28,23.27(d,JC,P=3.2Hz);膦谱核磁(162MHz,CDCl3)δ=-22.65ppm.高分辨质谱理论数据C28H39NOPS:m/z(%):468.2428(M+H+),实验数据:468.2487.
实施例6
(S)-N-((RS)-2-(diphenylphosphino)-1-(3,4,5-trimethoxyphenyl)ethyl)-2-methylpropane-2-sulfinamide[1f(S,RS)]的合成
具体操作参考实施例1,所用原料为(R)-(+)-叔丁基亚磺酰胺,亲核试剂为二苯基亚甲基膦锂,总产率为58%。
氢谱核磁(400MHz,CDCl3)δ7.43-7.39(m,2H),7.35-7.26(m,8H),6.47(s,2H),4.48-4.42(m,1H),3.80(s,3H),3.79(s,6H),3.64(d,J=3.8,1H),2.85(dd,J=13.8,6.4Hz,1H),2.53(dd,J=13.8,8.1Hz,1H),1.22(s,9H).碳谱核磁(100MHz,CDCl3)δ153.14,137.96,137.83,137.75(d,JC,P=12.3Hz),137.44,137.40,132.88(d,JC,P=19.6Hz),132.54(d,JC,P=19.0Hz),128.72,128.53(d,JC,P=6.7Hz),128.30,104.08,60.72,57.94(d,JC,P=21.0Hz),56.06,56.00,37.14(d,JC,P=4.4Hz),22.56;膦谱核磁(162MHz,CDCl3)δ=-23.71ppm.高分辨质谱理论数据C27H34NNaO4PS:m/z(%):522.1838(M+Na+),实验数据:522.1819.
实施例7
(S)-N-((RS)-2-(diphenylphosphino)-1-(furan-2-yl)ethyl)-2-methylpropane-2-sulfinamide[1g(S,RS)]的合成
具体操作参考实施例1,所用原料为(R)-(+)-叔丁基亚磺酰胺,亲核试剂为二苯基亚甲基膦锂,总产率为60%。核磁氢谱(400MHz,CDCl3)δ7.45-7.36(m,4H),7.34-7.30(m,7H),6.30-6.27(m,2H),4.53-4.45(m,1H),3.56(d,J=7.5Hz,1H),2.78(dd,J=13.9,7.6Hz,1H),1.15(s,9H);核磁碳谱(100MHz,CDCl3)δ154.28(d,JCP=5.4Hz),142.21,137.80(d,JCP=2.2Hz),137.67(d,JCP=2.0Hz),132.77(d,JCP=17.0Hz),132.57(d,JCP=16.8Hz),128.74,128.71,128.52(d,JCP=6.5Hz),128.46(d,JCP=6.6Hz),110.24,107.52(d,JCP=1.6Hz),56.23,52.43(d,JCP=19.8Hz),35.11(d,JCP=14.4Hz),22.41;核磁膦谱(162MHz,CDCl3)δ=-23.44ppm.高分辨质谱理论数据C22H27NO2PS:m/z(%):400.1495(M+H+),实验数据:400.1483.
实施例8
(R)-N-((RS)-2-(diphenylphosphino)-1-(thiophen-2-yl)ethyl)-2-methylpropane-2-sulfinamide[1h(R,RS)]的合成
具体操作参考实施例1,所用原料为(R)‐(+)‐叔丁基亚磺酰胺,亲核试剂为二苯基亚甲基膦锂,总产率为60%。核磁氢谱(400MHz,CDCl3)δ7.46-7.42(m,2H),7.35-7.29(m,5H),7.22(d,J=4.8Hz,2H),7.02(d,J=3.2Hz,1H),6.93-6.91(m,1H),4.77-4.71(m,1H),3.66(d,J=4.7Hz,1H),2.94(dd,J=13.8,6.8Hz,1H),2.59(dd,J=13.8,7.8Hz,1H),1.19(s,9H);核磁碳谱(100MHz,CDCl3)δ145.94(d,JCP=18.7Hz),137.91(d,JCP=12.6Hz),137.40(d,JCP=12.9Hz),132.82(d,JCP=3.2Hz),132.63(d,JCP=3.5Hz),128.86,128.64,128.62(d,JCP=9.6Hz),128.45(d,JCP=6.7Hz),126.71,125.75(d,JCP=1.7Hz),125.26,56.18,53.51(d,JCP=20.4JHz),38.30(d,JCP=14.1Hz),22.53;核磁膦谱(162MHz,CDCl3)δ=-23.78ppm。高分辨质谱理论数据C22H26NNaOPS2:m/z(%):438.1086(M+H+),实验数据:438.1075.
实施例9
(S)-N-((RS)-2-(diphenylphosphino)-1-(2-((triisopropylsilyl)oxy)phenyl)ethyl)-2-methylpropane-2-sulfinamide[1i(S,RS)]和(R)-N-((RS)-2-(diphenylphosphino)-1-(2-(trii sopro pylsilyl) -oxy)phenyl)ethyl)-2-methylpropane-2-sulfinamide[1j(R,RS)]的合成.
其中,THF为四氢呋喃;N2为氮气;Ti(iPrO)4为钛酸四异丙酯。
第一步:在一个500mL的三颈瓶,加入水杨醛(50mmol)和(R)-(+)-叔丁基亚磺酰胺(50mmol),在氮气的氛围下加入150mL四氢呋喃,加钛酸四异丙酯(100mmol),在50℃下搅拌,原料反应完全后搅拌下加入50mL蒸馏水,过滤,滤液用乙酸乙酯萃取三次,合并有机相,无水硫酸镁干燥,柱层析纯化,产率为85%。
第二步:将第一步制备的亚胺(1.13g,5mmol)加入50mL的茄形反应瓶中,氮气保护,加入30mL四氢呋喃。在室温下,缓慢加入二苯基亚甲基膦锂(10mmol),搅拌至原料反应完全,加入20mL蒸馏水淬灭反应,水相用乙酸乙酯萃取三次,合并有机相,无水硫酸镁干燥,过层析分离得到两种非对应异构体的混合物,产率为76%。
第三步:吹干反应瓶,氮气保护下将第二步制备得到的膦化合物用干燥的CH2Cl2溶解,室温下加入三乙胺搅拌10分钟后缓慢打入三异丙基氯硅烷,搅拌过夜,原料反应完全后加入少量水淬灭反应,分液,水相用乙酸乙酯萃取三次,合并有机相,无水硫酸镁干燥,柱层析纯化可分别得到两种非对应异构体,产率为90%。
氢谱核磁(400MHz,CDCl3)δ7.45-7.37(m,4H),7.31-7.27(m,7H),7.12-7.07(m,1H),6.89(t,J=7.5Hz,1H),6.75(d,J=8.1Hz,1H),5.08(s,1H),4.08(s,1H),2.80-2.68(m,2H),1.25-1.17(m,3H),1.12(s,9H),1.05(m,18H).碳谱核磁(100MHz,CDCl3)δ153.28,138.27(d,JCP=12.7Hz),137.25(d,JCP=11.5Hz),133.01(d,JCP=3.8Hz),132.82(d,JCP=3.7Hz),131.95, 128.64(d,JCP=5.9Hz),128.47(d,JCP=7.03Hz),128.18,128.12,120.58,117.94,55.67,37.22(d,JCP=16.0Hz),22.54,18.08,13.01;膦谱核磁(162MHz,CDCl3)δ=-25.92ppm.高分辨理论数据C33H49NO2PSSi:m/z(%):582.2985(M+H+),实验数据:582.2965.
氢谱核磁(400MHz,CDCl3)δ7.40-7.33(m,4H),7.29-7.26(m,7H),7.11-7.07(m,1H),6.89(t,J=7.1Hz,1H),6.76(d,J=8.1Hz,1H),4.87–4.79(m,1H),3.94(d,J=6.9Hz,1H),2.88(dd,J=14.2,7.9Hz,1H),2.63(dd,J=14.1,6.3Hz,1H),1.32-1.21(m,3H),1.12(s,9H),1.07(dd,J=7.4,2.9Hz,18H);碳谱核磁(100MHz,CDCl3)δ152.99,138.62(d,JC,P=13.1Hz),138.17(d,JC,P=13.0Hz),132.84(d,JC,P=19.2Hz),132.59(d,JC,P=19.0Hz),131.99(d,JC,P=5.2Hz),128.52,128.47,128.42,128.40,128.35,120.91,117.95,56.02,53.89,36.43(d,JC,P=14.5Hz),22.47,18.15,13.01;膦谱核磁(162MHz,CDCl3)δ=-23.81ppm.高分辨质谱理论数据C33H49NO2PSSi:m/z(%):582.2985(M+H+),实验数据:582.2964.
实施例10
(S)-N-((RS)-1-(2-((tert-butyldimethylsilyl)oxy)phenyl)-2-(diphenylphosphino)ethyl)-2-methylpropane-2-sulfinamide[2k(S,RS)]和(R)-N-((RS)-1-(2-((tert–butyldime-thylsilyl)oxy)phenyl)-2-(diphenylphosphino)ethyl)-2-methylpropane-2-sulfinam-ide[1l(R,RS)]的合成。
具体实验操作参考实施例9,实验所用原料为(R)-(+)-叔丁基亚磺酰胺,亲核试剂为二苯基亚甲基膦锂,总产率为57%。
氢谱核磁(400MHz,CDCl3)δ7.43-7.37(m,4H),7.32-7.27(m,7H),7.12-7.08(m,1H),6.91(t,J=7.4Hz,1H),6.75(d,J=8.2Hz,1H),5.01(s,1H),4.11(s,1H),2.70(d,J=6.8Hz,2H),1.13(s,9H),0.92(s,9H),0.17(d,J=5.5Hz,6H);碳谱核磁(100MHz,CDCl3)δ153.04,138.03(d,JCP=12.3Hz),137.25(d,JCP=11.2Hz),132.97(d,JCP=2.9Hz),132.78(d,JCP=2.8Hz),132.45(d,JC,P=5.0Hz),128.67,128.52(d,JCP=5.9Hz),128.45(d,JCP=5.5Hz),128.16,120.95,118.61,55.64,50.79,37.39(d,JC,P=15.4Hz),25.87,22.54,18.18,-4.14(d,JC,P=17.0);膦谱核磁(162MHz,CDCl3)δ=-25.72ppm.高分辨质谱理论数据C30H43NO2PSSi:m/z(%):540.2516(M+H+),实验数据:540.2510.
氢谱核磁(400MHz,CDCl3)δ7.41-7.31(m,4H),7.30-7.26(m,7H),7.12-7.08(m,1H),6.92-6.88(m,1H),6.75(dd,J=8.1,0.9Hz,1H),4.81-4.74(m,1H),3.90(d,J=7.2Hz,1H),2.85(dd,J=14.1,7.9Hz,1H),2.60(dd,J=14.1,6.5Hz,1H),1.13(s,9H),0.97(s,9H),0.22(d,J=1.8Hz,6H);碳谱核磁(100MHz,CDCl3)δ152.69,138.43(d,JCP=13.0Hz),138.12(d,JCP=12.7Hz),132.73(d,JCP=17.3Hz),132.51(d,JCP=19.1Hz),128.45,128.40,128.34,128.28,128.19,121.11,118.32,55.96,54.30,36.48(d,JC,P=16.7Hz),25.89,22.40,18.20,-4.02(d,JC,P=16.6Hz);膦谱核磁(162MHz,CDCl3)δ=-23.51ppm.高分辨质谱理论数据C30H43NO2PSSi:m/z(%):540.2516(M+H+),实验数据:540.2508.
实施例11
(S)-N-((RS)-1-(2-((tert-butyldiphenylsilyl)oxy)phenyl)-2-(diphenylphosphino)ethyl)-2-methylpropane-2-sulfinamide[1m(S,RS)]和(R)-N-((RS)-1-(2-((tert-butyldiph-enylsilyl)oxy)pheny-l)-2-(diphenylphosphino)ethyl)-2-methylpropane-2-sulfina-mide[1n(R,RS)]的合成
具体实验操作参考实施例9,实验所用原料为(R)-(+)-叔丁基亚磺酰胺,亲核试剂为二苯基亚甲基膦锂,总产率为52%。
氢谱核磁(400MHz,CDCl3)δ7.70(d,J=7.8Hz,4H),7.48-7.25(m,17H),6.84-6.74(m,2H),6.39(d,J=8.0Hz,1H),5.43(s,1H),4.99(s,1H),4.04(s,1H),2.94-2.87(m,2H),1.12(s,9H),0.98(s,9H);碳谱核磁(100MHz,CDCl3)δ152.75,138.34(d,JC,P=12.9Hz),137.33(d,JC,P=12.1Hz),135.38(d,JC,P=10.1Hz),132.98(d,JC,P=20.1Hz),132.77(d,JC,P=20.0Hz),132.45,131.94,131.65,129.86,128.77,128.59,128.52,128.47,127.86,127.78(d,JC,P=3.6Hz),120.90,119.22,55.69,37.38(d,JC,P=15.4Hz),26.49,22.53,19.20;膦谱核磁(162MHz,CDCl3)δ=-25.13ppm.高分辨质谱理论数据C40H47NO2PSSi:m/z(%):664.2829(M+H+),实验数据:664.2813.
氢谱核磁(400MHz,CDCl3)δ7.71-7.69(m,4H),7.43-7.26(m,17H),6.84-6.76(m,2H),6.40(dd,J=7.9,1.2Hz,1H),4.99(s,1H),4.07(s,1H),3.02(dd,J=14.1,7.8Hz,1H),2.79(dd,J=14.0,6.7Hz,1H),1.13(s,9H),1.04(s,9H);碳谱核磁(100MHz,CDCl3)δ152.50,138.50(d,JC,P=13.1Hz),138.14(d,JC,P=13.2Hz),135.40,132.81(d,JC,P=12.6Hz),132.62(d,JC,P=12.6Hz),132.22,131.91,131.86,129.94,128.59,128.54,128.47,128.40,128.16,127.88(d,JC,P=1.2Hz),121.22,119.38,56.06,36.67,26.65,22.48,19.28;膦谱核磁(162MHz,CDCl3)δ=-23.61ppm.高分辨质谱理论数据C40H47NO2PSSi:m/z(%):664.2829(M+H+),实验数据:664.2812.
实施例12
(R)-N-((RS)-2-(diphenylphosphino)-1-(2-((triethylsilyl)oxy)phenyl)ethyl)-2-methylpropane-2-sulfinamide[1o(R,RS)]和(S)-N-((RS)-2-(diphenylphosphino)-1-(2-((triethylsilyl)oxy)-phenyl)ethyl)-2-methylpropane-2-sulfinamide[1p(S,RS)]的合成
具体实验操作参考实施例9,实验所用原料为(R)-(+)-叔丁基亚磺酰胺,亲核试剂为二苯基亚甲基膦锂,总产率为55%.
氢谱核磁(400MHz,CDCl3)δ7.47-7.36(m,4H),7.34-7.27(m,7H),7.13-7.09(m,1H),6.92-6.89(m,1H),6.75(dd,J=8.1,0.9Hz,1H),4.89(s,1H),4.19(s,1H),2.71(d,J=6.4Hz,2H),1.14(s,9H),0.92(t,J=8.0Hz,9H),0.69(q,J=7.8Hz,6H);碳谱核磁(100MHz,CDCl3)δ153.17,138.16(d,JC,P=12.6Hz),137.24(d,JC,P=11.4Hz),132.98(d,JC,P=18.7Hz),132.79(d,JC,P=18.4Hz),132.03,128.73,128.57,128.51,128.45(d,JC,P=1.5Hz),128.39,128.24,120.82,118.0,55.65,37.23(d,JC,P=15.0Hz),22.53,6.71,5.12;膦谱核磁(162MHz,CDCl3)δ=-25.41ppm.高分辨理论数据C30H43NO2PSSi:m/z(%):540.2516(M+H+),实验数据:540.2498.
氢谱核磁(400MHz,CDCl3)δ7.42-7.40(m,2H),7.37-7.33(m,2H),7.31-7.27(m,6H),7.21(dd,J=7.6,1.4Hz,1H),7.12-7.08(m,1H),6.91-6.87(m,1H),6.75(dd,J=8.1,0.8Hz,1H),4.67-4.60(m,1H),4.12(d,J=7.6Hz,1H),2.83(dd,J=14.0,8.1Hz,1H),2.57(dd,J=14.0,6.6Hz,1H),1.15(s,9H),0.97(t,J=8.1Hz,9H),0.76(q,J=7.5Hz,6H);碳谱核磁(100MHz,CDCl3)δ152.91,138.59(d,JC,P=13.4Hz),138.27(d,JC,P=13.1Hz),132.80(d,JC,P=19.3Hz),132.59(d,JC,P=19.0Hz),132.36(d,JC,P=5.1Hz),128.51,128.46,128.40(d,JC,P=1.6Hz),128.34,128.13,117.87,56.03,55.44(d,JC,P=17.0Hz),36.69(d,JC,P=14.5Hz),22.54,6.76,5.23;膦谱核磁(162MHz,CDCl3)δ=-23.22ppm.高分辨质谱理论数据C30H43NO2PSSi:m/z(%):540.2516(M+H+),实验数据:540.2501.
实施例13
(R)-N-((RS)-2-(diphenylphosphino)-1-(2-hydroxyphenyl)ethyl)-2-methylpropane-2-sulfinamide[1q(R,RS)]和(S)-N-((RS)-2-(diphenylphosphino)-1-(2-hydroxyphen-yl)ethyl)-2-methylpro-pane-2-sulfinamide[1r(S,RS)]的合成
实验所用原料为(R)-(+)-叔丁基亚磺酰胺,亲核试剂为二苯基亚甲基膦锂,以上步骤总产率为57%,具体实验操作参见实施例9。
第四步:烘干反应瓶,氮气保护下用干燥的THF将第三步得到的手性膦化合物溶解,0℃下缓慢打入四丁基氟化氨的四氢呋喃溶液,待原料反应完全后加入少量蒸馏水洗涤并用乙酸乙酯萃取三次,合并有机相,无水硫酸镁干燥,过滤,旋干,柱层析纯化,产率分别为93%和91%。
氢谱核磁(400MHz,CDCl3)δ8.88(s,1H),7.45-7.40(m,2H),7.31-7.17(m,8H),7.03-6.98(m,2H),6.76-6.73(m,2H),4.90(t,J=4.4Hz,1H),4.61-4.55(m,1H),2.86-2.80(s,1H),2.75-2.69(s,1H),1.19(s,9H);碳谱核磁(100MHz,CDCl3)δ155.11,137.44(d,JC,P=11.0Hz),137.06(d,JC,P=11.4Hz),132.91(d,JC,P=18.9Hz),132.74(d,JC,P=18.8Hz),129.03,128.77,128.57,128.50,128.35(d,JC,P=6.9Hz),126.00(d,JC,P=5.0Hz),119.43,116.52,56.06,55.85(d,JC,P=18.2Hz),36.21(d,JC,P=15.1Hz),22.53;膦谱核磁(162MHz,CDCl3)δ=-24.21ppm.高分辨质谱理论数据C24H29NO2PS:m/z(%):426.1651(M+H+),实验数据:426.1712.
氢谱核磁(400MHz,CDCl3)δ9.34(s,1H),7.51-7.46(m,2H),7.35-7.30(m,5H),7.27-7.26(m,3H),6.86(dd,J=6.9,2.2Hz,1H),6.68-6.60(m,2H),6.07(dd,J=7.6,1.6Hz,1H),5.34(d,5.34Hz,1H),4.31-4.23(m,1H),3.08(m,1H),2.37-2.32(m,1H),1.22(s,9H);碳谱核磁(100MHz,CDCl3)δ154.66,138.66,138.65(d,JC,P=27Hz),132.97(d,JC,P=19.5Hz),132.44(d,JC,P=18.4Hz),129.01,128.65,128.43,128.37(d,JC,P=3.0Hz),128.32,7.87(d,JC,P=6.6Hz),127.14,118.86,116.77,61.85(d,JC,P=17.4Hz),56.76,36.12(d,JC,P=14.1Hz),22.71;膦谱核磁(162MHz,CDCl3)δ=-21.40ppm.高分辨质谱理论数据C24H29NO2PS:m/z(%):426.1651(M+H+),实验数据:426.1717.
实施例14.
手性膦化合物1在不对称分子内RC反应中的应用。
烘干反应管,氮气保护下用氯仿将底物6溶解,加入手性膦化合物1和50%的苯酚室温下搅拌至原料反应完全。
当使用手性膦化合物[1j(R,RS)]做催化剂时,反应结果如下:
当使用rac‐6l作反应底物时,动力学拆分结果如下:
当使用rac‐6m作为底物时,平行动力学拆分结果如下:
当使用手性膦化合物1i(S,RS)作催化剂时,反应结果如下:
核磁氢谱(400MHz,CDCl3)δ6.60(dd,J=10.3,1.7Hz,1H),6.31(d,J=3.4Hz,1H),5.98(d,J=10.4Hz,1H),5.59(d,J=3Hz,1H),3.340-3.38(m,1H),2.85-2.84(d,J=4.5Hz,2H),1.74(s,3H);核磁碳谱(100MHz,CDCl3)δ194.35,168.17,146.72,137.45,128.86,122.50,80.04,45.09,35.95,23.89;对映体过量:98%,拆分条件:Chiralpak IC,hexane/2-propanol=7/3;flow rate 0.5ml/min;25℃;215nm;first peak:tR=35.1min,secondpeak:tR=39.6min.
核磁氢谱(400MHz,CDCl3)δ6.63(dd,J=10.4,1.7Hz,1H),6.32(d,J=3.4Hz,1H),6.04(d,J=10.4Hz,1H),5.60(d,J=3.0Hz,1H),3.40-3.44(m,1H),2.82-2.84(d,J=5.2Hz,2H),2.14-1.96(m,2H),1.13(t,J=7.5Hz,3H);核磁碳谱(100MHz,CDCl3)δ194.59,168.24,145.96,137.68,129.65,122.50,82.49,42.48,36.41,30.35,7.82;对映体过量:99%,拆分条件:Chiralpak IC,hexane/2-propanol=9/1;flow rate 1.0ml/min;25℃;215nm;first peak:tR=53.7min,second peak:tR=55.3min.
核磁氢谱(400MHz,CDCl3)δ6.63(dd,J=10.4,1.5Hz,1H),6.32(dd,J=3.2,1.3Hz,1H),6.03(d,J=10.4Hz,1H),5.59(d,J=3.0Hz,1H),3.420-3.41(m,1H),2.89-1.89(m,2H),2.06-1.89(m,2H),1.61-1.52(m,2H),1.03(t,J=7.3Hz,3H);核磁碳谱(100MHz,CDCl3)δ194.64,168.30,146.17,137.65,129.47,122.48,82.32,43.11,39.65,36.39,16.99,14.27;对映体过量:98%,拆分条件:Chiralpak OZ-3,hexane/2-propanol=9/1;flow rate 1.0ml/min;25℃;215nm;first peak:tR=32.0min,second peak:tR=40.2min.
核磁氢谱(400MHz,CDCl3)δ6.63(dd,J=10.4,1.6Hz,1H),6.31(d,J=3.4Hz,1H),6.03(d,J=10.4Hz,1H),5.59(d,J=3.0Hz,1H),3.43-3.40(m,1H),2.83(d,J=4.9Hz,2H),2.07-1.90(m,2H),1.55-1.39(m,4H),0.95(t,J=7.2Hz,3H);核磁碳谱(100MHz,CDCl3)δ194.60,168.26,146.19,137.65,129.45,122.46,82.30,43.05,37.23,36.39,25.57,22.84,13.84;对映体过量:98%,拆分条件:Chiralpak OZ-3,hexane/2-propanol=9/1;flow rate 1.0ml/min;25℃;215nm;first peak:tR=28.9min,second peak:tR=32.9min.
核磁氢谱(400MHz,CDCl3)δ6.62(dd,J=10.5,1.8Hz,1H),6.37(d,J=3.2Hz,1H),6.14(d,J=10.1Hz,1H),5.66(d,J=3.2Hz,1H),4.45(q,J=9.6Hz 2H),3.58-3.54(m,1H),2.88-2.85(d,J=5.5Hz,2H),2.14(s,3H);核磁碳谱(100MHz,CDCl3)δ194.01,170.07,167.35,142.02,136.44,131.56,123.29,79.6,64.70,40.42,36.16,20.59;对映体过量:98%,拆分条件:Chiralpak AD-H,hexane/ethanol=4/1;flow rate 0.5ml/min;25℃;215nm;first peak:tR=22.1min,second peak:tR=23.8min.
核磁氢谱(400MHz,CDCl3)δ6.59(dd,J=10.4,1.8Hz,1H),6.33(d,J=3.4Hz,1H),6.04(d,J=10.4Hz,1H),5.61(d,J=3.0Hz,1H),3.72(s,3H),3.43-3.40(m,1H),2.86(d,J=4.2,2H),2.63-2.58(m,2H),2.44-2.29(m,2H);核磁碳谱(100MHz,CDCl3)δ194.14,172.58,167.77,144.92,137.00,129.82,122.85,81.13,52.07,42.90,35.89,31.68,27.98;对映体过量:98%,拆分条件:Chiralpak AD-H,hexane/2-popanol=4/1;flow rate0.5ml/min;25℃;215nm;first peak:tR=24.8min,second peak:tR=30.1min.
核磁氢谱(400MHz,CDCl3)δ7.50-7.42(m,5H),6.73(dd,J=10.3,1.7Hz,1H),6.38(d,J=3.4Hz,1H),6.24(d,J=10.3Hz,1H),5.63(d,J=3.0Hz,1H),3.55-3.51(m,1H),2.93-2.82(m,2H);核磁碳谱(100MHz,CDCl3)δ194.55,168.16,144.79,137.82,137.24,130.13,129.30,129.24,124.97,122.79,83.03,47.36,35.54;对映体过量:97%,拆分条件:Chiralpak IC,hexane/2-popanol=4/1;flow rate 1.0ml/min;25℃;215nm;firstpeak:tR=20.5min,second peak:tR=25.5min.
核磁氢谱(400MHz,CDCl3)δ7.50-7.46(m,2H),7.18-7.14(m,2H),6.72(d,J=10.3,1.8Hz,1H),6.39(d,J=3.4Hz,1H),6.24(d,J=10.3Hz,1H),5.64(d,J=3.0Hz,1H),3.53-3.49(m,1H),2.87(d,J=4.2Hz,2H);核磁碳谱(100MHz,CDCl3)δ194.20,167.86,163.05(d,J=248.0Hz),144.42,136.93,133.64(d,J=3.3Hz),130.20,126.99(d,J=8.5Hz),122.96,116.22(d,J=21.6Hz),82.53,47.40,35.36;对映体过量:96%,拆分条件:Chiralpak IC,hexane/2-propanol=4/1;flow rate 1.0ml/min;25℃;215nm;firstpeak:tR=18.9min,second peak:tR=25.5min.
核磁氢谱(400MHz,CDCl3)δ7.60(d,J=8.7Hz,2H),7.37(d,J=8.7Hz,2H),7.70(dd,J=10.3,1.8Hz,1H),6.40(d,J=3.4Hz,1H),6.25(d,J=10.3Hz,1H),5.64(d,J=3.0Hz,1H),3.51-3.47(m,1H),2.86(d,J=4.2Hz,2H);核磁碳谱(100MHz,CDCl3)δ194.14,167.83,144.15,136.94,136.83,132.42,130.44,126.74,123.61,123.16,82.51,47.29,35.41;对映体过量:97%,拆分条件:Chiralpak IC,hexane/2-propanol=7/3;flow rate0.5ml/min;25℃;215nm;first peak:tR=30.4min,second peak:tR=36.9min.
核磁氢谱(400MHz,CDCl3)δ7.16(dd,J=8.0,6.3Hz,2H),6.65(dd,J=10.3,1.8Hz,1H),6.42(d,J=3.4Hz,1H),6.28(d,J=10.3Hz,1H),5.68(d,J=3.0Hz,1H),3.50-3.46(m,1H),2.94-2.83(m,2H);核磁碳谱(100MHz,CDCl3)δ193.47,167.15,151.60(ddd,J=2498.3,12.1,4.0Hz),143.01,140.04(dt,J=253.7,14.9Hz),136.15,134.37(dd,J=11.2,6.7Hz),130.97, 123.68,109.82(dd,J=16.4,6.8Hz),81.45,47.11,35.25;对映体过量:97%,拆分条件:Chiralpak OZ-3,hexane/2-propanol=4/1;flow rate 0.8ml/min;25℃;215nm;first peak:tR=18.5min,second peak:tR=23.7min.
核磁氢谱NMR(400MHz,CDCl3)δ6.17(s,1H),5.86(s,1H),5.50(s,1H),2.78-2.74(m,1H),2.58-2.54(m,1H),2.05(d,J=1.3,3H),1.60(s,3H),1.26(s,3H);核磁碳谱(100MHz,CDCl3)δ194.69,168.33,158.42,142.75,127.79,120.44,84.74,47.02,43.25,24.80,18.69,17.64;对映体过量:99%,拆分条件:Chiralpak OZ-3,hexane/2-propanol=4/1;flow rate 0.8ml/min;25℃;215nm;first peak:tR=24.6min,second peak:tR=29.0min.
核磁氢谱(400MHz,CDCl3)δ6.91(dd,J=10.0,2.8Hz,1H),6.70-6.69(m,1H),6.39(dd,J=17.3,1.2Hz,1H),6.25(d,J=10.0Hz,1H),6.09(dd,J=17.3,10.4Hz,1H),5.86(dd,J=10.4,1.2Hz,1H),1.92(d,J=1.2Hz,3H),1.59(s,3H);核磁碳谱(100MHz,CDCl3)δ185.70,164.62,148.75,144.05,134.93,131.58,128.12,127.83,74.83,26.39,15.66;拆分条件:Chiralpak OZ-3,n-hexane/2-propanol=9/1;flow rate 0.8mL/min;25℃;215nm,first peak:tR=13.7min,second peak:tR=14.8min.
核磁氢谱(400MHz,CDCl3)δ6.37-6.36(m,1H),6.28(d,J=3.4Hz,1H),5.57(d,J=2.7Hz,1H),3.35–3.31(m,1H),2.90–2.79(m,2H),1.77(d,J=1.4Hz,3H),1.72(s,3H);核磁碳谱(100MHz,CDCl3)δ194.97,168.55,142.17,137.78,135.80,122.24,80.84,45.16,36.18,24.17,15.61;拆分条件:Chiralpak OZ-3,n-hexane/2-propanol=4/1;flow rate0.5mL/min;25℃;215nm;first peak:tR=18.0min,second peak:tR=20.6min.
核磁氢谱(400MHz,CDCl3)δ6.27(d,J=3.4Hz,1H),5.85(s,1H),5.56(d,J=3.0Hz,1H),3.38-3.34(m,1H),2.88-2.78(m,2H),2.03(d,J=1.4Hz,3H),1.76(s,3H);核磁碳谱(100MHz,CDCl3)δ194.08,168.22,157.25,137.13,127.45,121.83,82.16,45.98,35.43,22.67,18.32;拆分条件:Chiralpak OZ-3,n-hexane/2-propanol=4/1;flow rate0.5mL/min;25℃;215nm,first peak:tR=17.4min,second peak:tR=26.3min.
核磁氢谱(400MHz,CDCl3)δ6.60(d,J=13.7Hz,1H),6.2(s,1H),5.98(d,J=13.6Hz,1H),5.52(s,1H),2.81-2.54(m,2H),1.58(s,3H),1.25(s,3H);核磁碳谱(100MHz,CDCl3)δ195.46,168.26,148.07,142.84,128.63,121.09,82.51,46.33,43.68,24.45,19.16;拆分条件:Chiralpak OZ-3,n-hexane/2-propanol=4/1;flow rate 0.5mL/min;25℃;215nm;first peak:tR=13.9min,second peak:tR=20.2min。

Claims (8)

1.一种手性膦化合物,其特征在于,其结构通式如下式(1)所示:
式(1)中,R=苯基;R1=苯基,2-萘基,金刚烷基,3,4,5,-三甲氧基苯基,2-呋喃,2-噻吩,2-(三异丙基硅氧基)-苯基,2-(二甲基叔丁基硅氧基)-苯基,2-(二苯基叔丁基硅氧基)-苯基,2-(三乙基硅氧基)-苯基,邻羟基苯基、C1-C10的烷基;R2=氢、C1-C10的烷基;R3=叔丁基;
所述手性膦化合物不包括:
所述式(1)化合物具有稳定的手性。
2.如权利要求1所述的手性膦化合物,其特征在于,所述式(1)手性膦化合物经过硅胶柱纯化得到光学纯化合物,其为(S,RS)、(R,RS)、(S,SS)和(R,SS)四种构型;所述四种构型如下:
其中,R=苯基;R1=苯基,2-萘基,金刚烷基,3,4,5,-三甲氧基苯基,2-呋喃,2-噻吩,2-(三异丙基硅氧基)-苯基,2-(二甲基叔丁基硅氧基)-苯基,2-(二苯基叔丁基硅氧基)-苯基,2-(三乙基硅氧基)-苯基,邻羟基苯基、C1-C10的烷基;R2=氢、C1-C10的烷基;R3=叔丁基。
3.如权利要求2所述手性膦化合物的制备方法,其特征在于,包括以下步骤:
第一步:式(2)所示的醛或酮与式(3(RS))、式(3(SS))所示的手性亚磺酰胺反应,分别生成式(4(RS))、式(4(SS))所示的手性亚磺酰亚胺;
第二步:再与不同的含膦金属试剂反应,得到四种立体构型的手性膦化合物,其结构为式(1(S,RS))、式(1(R,RS))、式(1(S,SS))、式(1(R,SS));
其中,M1=Li,Na,K,MgX,ZnX;M2=Na,K,MgX,ZnX;X=F,Cl,Br,I。
4.如权利要求3所述的方法,其特征在于,所述第一步中,所述式(2)所示的醛或酮、式(3(RS))或式(3(SS))所示的手性亚磺酰胺、缩合剂之间的摩尔比为1:1~10:1~15。
5.如权利要求3所述的方法,其特征在于,所述第一步中,所述反应温度为‐30~100℃;反应时间为0.5~48h。
6.如权利要求3所述的方法,其特征在于,所述第二步中,所述式(4(RS))或式(4(SS))所示的手性亚磺酰亚胺与含膦金属试剂的摩尔比为1:1~10。
7.如权利要求3所述的方法,其特征在于,所述第二步中,反应温度为-100~50℃;反应时间为0.1~48h。
8.如权利要求1所述的式(1)手性膦化合物在不对称分子内环化反应中的应用,其特征在于,其反应式如下:
其中,R5选自芳基、脂肪取代基;R6选自氢、芳基、脂肪取代基;R7选自芳基、脂肪取代基;R8选自氢、芳基、脂肪取代基;其中,所述脂肪取代基选自烷基、环烷基;1表示式(1)手性膦化合物。
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