Substituted 1,7-dioxabicyclo[3.3.0]octanes: New easy access to the perhydrofurofuran core of aflatoxins and analogues
作者:Francisco Alonso、Emilio Lorenzo、Miguel Yus
DOI:10.1016/s0040-4039(97)00278-5
日期:1997.3
The reaction of 3-chloro-2-(chloromethyl)-1-propene(1) with lithium and a catalytic amount of naphthalene in the presence of different carbonyl compounds in THF a -78 degrees C affords, after hydrolysis, the corresponding methylenic diols 2, which by a tandem hydroboration-oxidation with hydrogen peroxide followed by treatment with PCC (for ketone derivatives) or RuCl2(PPh(3))(3) (for aldehyde derivatives) yields the expected perhydrofurofurans 3. (C) 1997 Elsevier Science Ltd.
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)