Stereoselectivesynthesis of (+)-lauthisan has been accomplished starting from d-glyceraldehyde acetonide by combination of diastereoselective alkylation and ring-closing metathesis. High degree of 1,3-asymmetricinduction has been realized in ether system.
Diastereo- and enantioselective preparation of β-alkylhomoallylic alcohols
作者:Yuichi Kobayashi、Yasunori Kitano、Yoshiyuki Takeda、Fumie Sato
DOI:10.1016/s0040-4020(01)90583-6
日期:1986.1
A new and efficient method for the preparation of four possible stereoisomers of β-alkylhomoallylic alcohols 1 has been developed which is based on the diastereoselective addition of nucleophiles to opticallyactive α-alkyl-β-trimethylsilyl-β,γ-unsaturated carbonyl compounds. The utility of this reaction is demonstrated by the synthesis of naturally occurring serricornin and corynomycolic acid.
Acyclic stereoselection using 1,2-asymmetric induction. The first total synthesis of (+)-corynomycolic acid
作者:Yasunori Kitano、Yuichi Kobayashi、Fumie Sato
DOI:10.1039/c39850000498
日期:——
The first total synthesis of (+)-corynomycolic acid (1), which includes as the key step, diastereoselective reduction of the optically active carbonyl compounds (8) is described.
An efficient synthesis of α,β-unsaturated ketones based on reaction of alkenylcopper(1)reagents with selenoesters (or acylchlorides) has been elaborated.
A regiodefined synthesis of α-trimethylsilyl ketones catalyzed by rhodium(I) hydride complex
作者:Susumu Sato、Isamu Matsuda、Yusuke Izumi
DOI:10.1016/0022-328x(88)80214-6
日期:1988.4
Regiodefined synthesis of α-trimethylsilyl ketones is attained by one of three different routes: isomerization of β-trimethylsilyl allyl alcohols (route A), isomerization of β′-trimethylsilyl allyl alcohols (route B), and dehydrogenation of β-trimethylsilyl alcohols via transfer hydrogenation to α,β-enones (route C). All of these procedures are catalyzed efficiently by HRh(PPh3)4 at about 100 °C. Route