Selective Transformations of Carbonyl Functions in the Presence of α,β-Unsaturated Ketones: Concise Asymmetric Total Synthesis of Decytospolides A and B
摘要:
Enones selectively react with a combination of PPh3 and TMSOTf to produce phosphonium silyl enol ethers, which work as protective groups of enones during the reduction of other carbonyl functions and can be easily deprotected to regenerate parent enones at workup. Furthermore, the first ketone selective alkylations in the presence of enones were also accomplished. This in situ protection method was applied to concise asymmetric total syntheses of decytospolides A and B.
Selective Transformations of Carbonyl Functions in the Presence of α,β-Unsaturated Ketones: Concise Asymmetric Total Synthesis of Decytospolides A and B
摘要:
Enones selectively react with a combination of PPh3 and TMSOTf to produce phosphonium silyl enol ethers, which work as protective groups of enones during the reduction of other carbonyl functions and can be easily deprotected to regenerate parent enones at workup. Furthermore, the first ketone selective alkylations in the presence of enones were also accomplished. This in situ protection method was applied to concise asymmetric total syntheses of decytospolides A and B.
Highly Productive α-Alkylation of Ketones with Alcohols Mediated by an Ir–Oxalamidato/Solid Base Catalyst System
作者:Hideo Shimizu、Hironori Maeda、Hideki Nara
DOI:10.1021/acs.oprd.0c00362
日期:2020.11.20
An Ir–oxalamidato complex in combination with a solid base (e.g., magnesium aluminometasilicate/Ca(OH)2) significantly improved the catalyst productivity in α-alkylation of methyl ketones with primary alcohols. Optimization through systematic variation of the oxalamidato ligand led to a practical turnover number (TON) of 10 000–40 000.
[DE] VERFAHREN ZUR HERSTELLUNG VON 1,7-OCTADIEN UND DESSEN VERWENDUNG<br/>[EN] METHOD FOR THE PRODUCTION OF 1.7-OCTADIENE AND USE THEREOF<br/>[FR] PROCEDE DE PRODUCTION DE 1,7-OCTADIENE ET UTILISATION DE CE DERNIER
申请人:BASF AG
公开号:WO2005030681A1
公开(公告)日:2005-04-07
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von 1,7-Octadien durch Metathese von Cyclohexen mit Ethylen. Sie betrifft ferner Verfahren zur Herstellung von 1,10-Dekandial durch Hydroformylierung von auf diese Weise hergestelltem 1,7-Octadien. Darüber hinaus betrifft die Erfindung Verfahren zur Herstellung von Muscon oder dessen olefinisch ungesättigter Aanaloga unter Verwendung von auf diese Weise zugänglichem 1,10-Dekandial.
VERFAHREN ZUR HERSTELLUNG VON 1,7-OCTADIEN UND DESSEN VERWENDUNG
申请人:BASF Aktiengesellschaft
公开号:EP1667950A1
公开(公告)日:2006-06-14
Selective Transformations of Carbonyl Functions in the Presence of α,β-Unsaturated Ketones: Concise Asymmetric Total Synthesis of Decytospolides A and B
Enones selectively react with a combination of PPh3 and TMSOTf to produce phosphonium silyl enol ethers, which work as protective groups of enones during the reduction of other carbonyl functions and can be easily deprotected to regenerate parent enones at workup. Furthermore, the first ketone selective alkylations in the presence of enones were also accomplished. This in situ protection method was applied to concise asymmetric total syntheses of decytospolides A and B.