eco-friendly method has been developed for the synthesis of allyl thiosulfonates using Morita–Baylis–Hillman (MBH) allyl bromides and sodium arylthiosulfonates, which were readily assembled without any reagent/catalyst. Moreover, the allyl thiosulfonates were successfully transformed into a set of two synthetically viable diallyl disulfanes and unsymmetrical allyl disulfanes in the presence of Cs2CO3. The present
已经开发出一种实用、高度灵活且环保的方法,用于使用 Morita-Baylis-Hillman (MBH) 烯丙基溴和芳基硫代磺酸钠合成烯丙基硫代磺酸盐,无需任何试剂/催化剂即可轻松组装。此外,在Cs 2 CO 3存在下,烯丙基硫代磺酸盐成功地转化为一组两种合成可行的二烯丙基二硫烷和不对称烯丙基二硫烷。本协议在操作上简单方便,可生成多种功能化的烯丙基硫代磺酸盐和烯丙基二硫烷,产率良好。
Controlled synthesis of 1-vinylnaphthalenes versus (E)-α-(1,3-enyn-4-yl)-α,β-unsaturated esters from Morita–Baylis–Hillman bromides: a sequential alkynylation and competitive 6π-electrocyclization versus conjugative transposition of a triple bond
作者:Jin Woo Lim、Ko Hoon Kim、Se Hee Kim、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2013.03.007
日期:2013.5
An expedient controlled synthesis of 1-vinylnaphthalenes and various dienyne derivatives has been carried out from the Morita-Baylis-Hillman bromides and propargyl acetate or p-nitrophenyl propargyl ether. By judicious choice of base, reaction temperature, and leaving group, a selective synthesis of 1-vinylnaphthalenes and dienynes, (E)-alpha-(1,3-enyn-4-yl)-alpha,beta-unsaturated esters, could be performed. (C) 2013 Elsevier Ltd. All rights reserved.
Pd(0)-catalyzed couplings using bromide and chloride derivatives of Baylis–Hillman adducts with triarylbismuths as atom-efficient multi-coupling nucleophiles
作者:Maddali L.N. Rao、Debasis Banerjee、Ritesh J. Dhanorkar
DOI:10.1016/j.tet.2010.03.020
日期:2010.5
triarylbismuths affording allylic arylated products in high yields under palladium-catalyzed conditions. Triarylbismuths have been employed in sub-stoichiometric amounts as multi-coupling and atom-efficient nucleophiles in these reactions. The reactivity of both allylic bromides and chlorides was found to be facile and equally efficient in couplings with triarylbismuths.