Rapid and Stereoselective Synthesis of Spirocyclic Ethers via the Intramolecular Piancatelli Rearrangement
作者:Leoni I. Palmer、Javier Read de Alaniz
DOI:10.1021/ol303263q
日期:2013.2.1
The first example of a Piancatelli rearrangement of alcohols is demonstrated utilizing dysprosium(III) triflate as a catalyst to access oxaspirocycles in a highly diastereoselective manner. The cascade reaction constructs the spirocyclicether ring system and the tertiary stereocenter in a single operation and is experimentally easy to perform.
Catalytic Environmentally Friendly Protocol for Achmatowicz Rearrangement
作者:Zhilong Li、Rongbiao Tong
DOI:10.1021/acs.joc.6b00469
日期:2016.6.3
The increasing interest in Achmatowiczrearrangement in organic synthesis calls for a more environmentally friendly protocol since the most popular oxidants m-CPBA and NBS produced stoichiometric organic side product (m-chlorobenzoic acid or succinimide). Mechanism-guided analysis enables us to develop a new catalytic method (Oxone/KBr) for AchR in excellent yield with K2SO4 as the only side product
由于最流行的氧化剂m -CPBA和NBS产生化学计量的有机副产物(m-氯苯甲酸或琥珀酰亚胺),因此有机合成中对Achmatowicz重排的兴趣日益增加,这要求采用更加环保的方案。机理指导的分析使我们能够开发出一种新的催化方法(Oxone / KBr),以K 2 SO 4作为唯一的副产物,具有极高的收率,极大地促进了纯化。该协议已与其他转换集成在一起,从而可以快速访问高度功能化的二氢吡喃酮。
[EN] NOVEL MONOMERS FROM BIOMASS<br/>[FR] NOUVEAUX MONOMÈRES DÉRIVÉS DE BIOMASSE
申请人:SIBI MUKUND P
公开号:WO2016022943A2
公开(公告)日:2016-02-11
Compounds derived from biomass, e.g., cellulose and lignins, methods of forming such compounds and polymers and products formed using such compounds.