Ustiloxin D 和拟霉蛋白酶 A 是有效的抗有丝分裂剂,可与微管蛋白结合并干扰细胞微管功能。已经开发了一种合成策略,以允许获得天然产物以及 ustiloxin 和拟霉蛋白酶家族成员的各种变体,以便为生物学研究提供足够的数量。在此,我们报告了使用最长 20 步线性序列对 ustiloxin D 进行对映选择性全合成。五个立体中心中的四个是使用催化不对称方法设置的。特别是,埃文斯的新铝催化不对称羟醛反应促进了获得与在 ustiloxins 和拟霉蛋白酶中发现的不同苄基立体化学相对应的顺式和反式产物。此外,由于其高官能团耐受性,Trost' s Pd 介导的醚化被用来构建手性叔烷基芳基醚。总之,这些合成策略使我们能够使用密集功能化的中间体来实现 ustiloxin D 的有效合成。
Regioselective rhodium-catalyzed allylic alkylation with a modified Wilkinson's catalyst
作者:P.Andrew Evans、Jade D. Nelson
DOI:10.1016/s0040-4039(98)00142-7
日期:1998.3
Treatment of the secondary and tertiary allylic carbonates 1 with the sodium salt of dimethyl malonate and a catalytic amount of Wilkinson's catalyst modified with a triorganophosphite, furnished the tertiary and quaternary carbon stereogenic centers 2 in high yield with excellent regioselectivity. (C) 1998 Elsevier Science Ltd. All rights reserved.
Total Synthesis of Ustiloxin D and Considerations on the Origin of Selectivity of the Asymmetric Allylic Alkylation
作者:Andrew M. Sawayama、Hiroko Tanaka、Thomas J. Wandless
DOI:10.1021/jo048854f
日期:2004.12.1
C9. The chiral aryl−alkyl ether was assembled using a Pd-catalyzed asymmetric allylicalkylation that notably delivered a product with stereochemistry opposite to that predicted by precedent. The linear tetrapeptide was subsequently cyclized to produce ustiloxin D. The mechanistic origin of the allylicalkylationselectivity was further investigated, and a working hypothesis for the origin of the observed
作者:Hiroko Tanaka、Andrew M. Sawayama、Thomas J. Wandless
DOI:10.1021/ja035429f
日期:2003.6.1
total synthesis of ustiloxin D using a longest linear sequence of 20 steps. Four of the five stereocenters were set using catalytic asymmetric methodologies. In particular, Evans's new Al-catalyzed asymmetric aldol reaction facilitated access to both syn and anti products corresponding to the different benzylic stereochemistries found in ustiloxins and phomopsins. In addition, due to its high functional
Ustiloxin D 和拟霉蛋白酶 A 是有效的抗有丝分裂剂,可与微管蛋白结合并干扰细胞微管功能。已经开发了一种合成策略,以允许获得天然产物以及 ustiloxin 和拟霉蛋白酶家族成员的各种变体,以便为生物学研究提供足够的数量。在此,我们报告了使用最长 20 步线性序列对 ustiloxin D 进行对映选择性全合成。五个立体中心中的四个是使用催化不对称方法设置的。特别是,埃文斯的新铝催化不对称羟醛反应促进了获得与在 ustiloxins 和拟霉蛋白酶中发现的不同苄基立体化学相对应的顺式和反式产物。此外,由于其高官能团耐受性,Trost' s Pd 介导的醚化被用来构建手性叔烷基芳基醚。总之,这些合成策略使我们能够使用密集功能化的中间体来实现 ustiloxin D 的有效合成。