A novel 1,3-dithiane-based cyclopenta-annellation procedure: synthesis of the rocaglamide skeleton
作者:Andrew E. Davey、Richard J. K. Taylor
DOI:10.1039/c39870000025
日期:——
A novel three carbon cyclopentanone annellation procedure, based on direct 1,3-dithiane lithiation followed by intramolecular carbonyl addition, has been employed in a synthetic approach to the anit-cancer compound, rocaglamide.
Aggregative activation and carbanion chemistry : complex base deprotonation and directed functionalisation of dithioacetals
作者:Philippe Gros、Philippe Hansen、Paul Caubére
DOI:10.1016/s0040-4020(96)00972-6
日期:1996.11
Bis(phenylthio)methane and [1,3]-dithiane were efficiently deprotonated by the NaNH2-Et(OCH2CH2)(2)-ONa complex base. A marked behaviour difference was observed between the sodium carbanion of [1,3]-dithiane and the corresponding lithio-derivative; A ''radicaioid'' mechanism is proposed to explain the results observed. Copyright (C) 1996 Elsevier Science Ltd
A 5C + 5C bicycloaromatization reaction via an aldol condensation cascade. A regioselective synthesis of functionalized naphthalenes from acyclic precursors