New Trimethylenemethane Dianion Synthons: Application to the Preparation of Substituted Perhydrofuro[2,3-b]furans
作者:Emilio Lorenzo、Francisco Alonso、Miguel Yus
DOI:10.1016/s0040-4020(00)00060-0
日期:2000.3
The reaction of 3-chloro-2-(chloromethyl)prop-1-ene (1) with lithium powder and a catalytic amount of naphthalene in the presence of different electrophiles in THF at −78°C yields products 2. When carbonylic compounds are used as electrophiles the corresponding methylenic diols are obtained, which by tandem hydroboration–oxidation with alkaline hydrogen peroxide and treatment with PCC (for ketone derivatives)
An efficient synthesis of substituted perhydrofuro[2,3-b]furans has been accomplished from readily accesible 3-methylidene-1,5-diols based on an intramolecular acetalisation under Wacker-typereaction conditions.
在Wacker型反应条件下,基于分子内缩醛化反应,由容易获得的3-亚甲基-1,5-二醇可以有效地合成取代的全氢呋喃[2,3- b ]呋喃。