2-Functionalized allyl tris(trimethylsilyl)silanes as radical-based allylating agents
作者:Chryssostomos Chatgilialoglu、Carla Ferreri、Marco Ballestri、Dennis P. Curran
DOI:10.1016/0040-4039(96)01354-8
日期:1996.8
Radical allylations with 2-functionalized allyl tris(trimethylsilyl)silanes occur under mild conditions in good to excellent yield provided that the radical precursor and the silane have the appropriate electronic pairing. These reactions offer tin-free altermatives for transformations that are currently conducted with allyl stannanes.
Concise Synthesis of 1,3-Diacetoxy-2-[2′-(2′′,4′′-difluorophenyl)prop-2′-en-1′-yl]propane: An Intermediate for Posaconazole
作者:Yunxiang Chen、Yangwei Huang、Xueqing Zhao、Zhongming Li
DOI:10.1080/00397911.2014.929147
日期:2015.3.19
A concise process of 1,3-diacetoxy-2-[2-(2,4-difluorophenyl)prop-2-en-1-yl]propane has been developed. Diethyl malonate was C-alkylated with 2,3-dichloropropene and then the ester groups were reduced by LiAlH4, followed by acylation to provide 2-(2-chloroprop-2-en-1-yl)-1,3-diacetoxypropane. The chloropropene was finally coupled with 2,4-difluorophenylmagnesium bromide and catalyzed by Fe(acac)(3) to afford the title compound in good total yield.
Fe-Catalyzed reactions of 2-chloro-1,7-dienes and allylmalonates
Fe(III)(BIAP)Cl-3 complex catalyzes alkylative cyclization of 2-chloro-1,7-heptadiene in the presence of triethylaluminum. It also catalyzes deallylation of certain 2-allyl-2-substituted malonates under the same reaction conditions. (c) 2007 Elsevier Ltd. All rights reserved.
Transformations of diethyl mono- and di(?-chloroallyl)malonates
作者:E. G. Mesropyan、E. N. Dzhandzhapanyan、M. T. Dangyan