Ag(I)-或Ag(I)-Au(I)催化的炔醇和α-酮酸酯级联环化合成Furo [2,3- b ]吡喃-2-酮
摘要:
已经开发了Ag(I)-或Ag(I)-Au(I)催化的炔烃(5-己炔-1-醇系统)与α-酮酸酯的级联环化反应,涉及双活化过程(π和σ)。第一次。该反应通过炔醇的环异构化进行,得到6-内-烯醇醚,然后用α-酮酸酯环化,以良好的产率提供呋喃[2,3 - b ]吡喃-2-酮。所有产品的化学结构均通过单晶X射线分析和类似物严格确认。
Tandem hydroalkoxylation/hydroallylation and hydroalkoxylation/hydrocyanation reactions of alkyl-substituted unactivated alkynes by catalytic systems based on B(C6F5)3·nH2O and silyl nucleophiles were developed. The characteristic high alkynophilicity of B(C6F5)3 enabled the selective activation of the unactivated alkynes in the presence of the reactive alkene of allylsilane. Moreover, the alkynes
基于B(C 6 F 5)3 · n H 2 O和甲硅烷基亲核试剂的催化体系,开发了烷基取代的未活化炔烃的串联加氢烷氧基化/加氢芳基化和加氢烷氧基化/加氢氰化反应。B(C 6 F 5)3的特征性高亲核性使它能够在烯丙基硅烷的反应性烯烃存在下选择性活化未活化的炔烃。此外,在该催化体系中,在氰化物存在下,炔烃被亲电活化。机理研究表明,炔烃在两个反应中被不同的催化物种活化。
[EN] FURO[2,3-B]PYRAN-2-ONE COMPOUNDS AND PROCESS FOR PREPARATION THEREOF<br/>[FR] COMPOSÉS DE FURO[2,3-B]PYRAN-2-ONE ET PROCÉDÉ DE PRÉPARATION ASSOCIÉ
申请人:COUNCIL SCIENT IND RES
公开号:WO2018220647A1
公开(公告)日:2018-12-06
The present invention discloses a novel furo[2,3-b]pyran-2-one compound of formula (I) and a single step process for the preparation of furo[2,3-b]pyran-2-ones using Lewis acid-promoted cascade annulation of alkynols and α-ketoesters.
Furo[2,3-b]pyran-2-one compounds and process for preparation thereof
申请人:COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
公开号:US10941155B2
公开(公告)日:2021-03-09
The present invention discloses a novel furo[2,3-b]pyran-2-one compound of formula (I) and a single step process for the preparation of furo[2,3-b]pyran-2-ones using Lewis acid-promoted cascade annulation of alkynols and α-ketoesters.
FURO[2,3-b]PYRAN-2-ONE COMPOUNDS AND PROCESS FOR PREPARATION THEREOF
申请人:COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
公开号:US20200165263A1
公开(公告)日:2020-05-28
The present invention discloses a novel furo[2,3-b]pyran-2-one compound of formula (I) and a single step process for the preparation of furo[2,3-b]pyran-2-ones using Lewis acid-promoted cascade annulation of alkynols and α-ketoesters.