New Process for the Preparation of Methyl Carbonates
摘要:
graphicThe methyl carbonate of HOBt was developed for the conversion of alcohols to carbonates. This method is superior to the use of methyl chloroformate or methyl pyrocarbonate, especially with more hindered alcohols. The reagent is a stable solid that is easily prepared on a multigram scale.
New Process for the Preparation of Methyl Carbonates
摘要:
graphicThe methyl carbonate of HOBt was developed for the conversion of alcohols to carbonates. This method is superior to the use of methyl chloroformate or methyl pyrocarbonate, especially with more hindered alcohols. The reagent is a stable solid that is easily prepared on a multigram scale.
[EN] ENANTIOSELECTIVE SYNTHESIS OF ?-AMINO-a,ß-UNSATURATED CARBOXYLIC ACID DERIVATIVES<br/>[FR] SYNTHÈSE ÉNANTIOSÉLECTIVE DE DÉRIVÉS D'ACIDES CARBOXYLIQUES G-AMINO-?,?-INSATURÉS
申请人:NOVARTIS AG
公开号:WO2010055162A1
公开(公告)日:2010-05-20
Provided is an enantioselective, palladium-catalyzed method for the preparation of γ-amino-α,β-unsaturated carboxylic acid derivatives having the formulas II, III, IV and VIII.
提供了一种手性选择性的钯催化方法,用于制备具有 II、III、IV 和 VIII 公式的γ-氨基-α,β-不饱和羧酸衍生物。
A Synthetic Approach toward Nitiol: Construction of Two 1,22-Dihydroxynitianes
作者:Michael S. Wilson、Jacqueline C. S. Woo、Gregory R. Dake
DOI:10.1021/jo0604585
日期:2006.5.1
nitiol has culminated in the construction of two epimeric hydroxylated derivatives, the 1,22-dihydroxynitianes. Key stereodefining steps in the construction of the A-ring fragment (13) were the use of a siloxy−epoxide rearrangement reaction, a Pauson−Khand reaction, a Norrish 1 photochemical cleavage reaction, and a highlyregio- and stereoselective hydrostannylation reaction of an ynoate. The stereochemistry
Enantioselective Synthesis of Pyrrole-Based Spiro- and Polycyclic Derivatives by Iridium-Catalyzed Asymmetric Allylic Dearomatization and Controllable Migration Reactions
作者:Chun-Xiang Zhuo、Qiang Cheng、Wen-Bo Liu、Qiang Zhao、Shu-Li You
DOI:10.1002/anie.201502259
日期:2015.7.13
first highly diastereo‐ and enantioselectivesynthesis of five‐membered spiro‐2H‐pyrroles was achieved using an Ir‐catalyzed asymmetric allylic dearomatization reaction. The spiro‐2H‐pyrrole derivatives readily undergo a controllable and stereospecific allylic migration under acidcatalysis, providing polycyclic pyrrole derivatives in excellent yields and ee values. Additionally, the novel Ir‐complex K1
Enantioselective Synthesis of y-amino-alpha beta-unsaturated carboxylic acid derivatives
申请人:Acemoglu Murat
公开号:US20110263873A1
公开(公告)日:2011-10-27
Provided is an enantioselective, palladium-catalyzed method for the preparation of γ-amino-α,β-unsaturated carboxylic acid derivatives having the formulas II, III, VII and VIII:
Enantioselective Synthesis of y-amino-a, B-unsuturated carboxylic acid derivatives
申请人:Acemoglu Murat
公开号:US20120330030A1
公开(公告)日:2012-12-27
Provided is an enantioselective, palladium-catalyzed method for the preparation of γ-amino-α,β-unsaturated carboxylic acid derivatives having the formulas II, III, VII and VIII: