Applications of NHC-mediated O- to C-carboxyl transfer: synthesis of (±)-N-benzyl-coerulescine and (±)-horsfiline
摘要:
NHC-promoted O- to C-carboxyl transfer of 3-allyl indolyl phenyl carbonates generates 3-allyl-3-phenoxycarbonyl-oxindoles with good catalytic efficiency, which are readily converted into (+/-)-N-benzylcoerulescine and (+/-)-horsfiline. (C) 2010 Elsevier Ltd. All rights reserved.
Applications of NHC-mediated O- to C-carboxyl transfer: synthesis of (±)-N-benzyl-coerulescine and (±)-horsfiline
摘要:
NHC-promoted O- to C-carboxyl transfer of 3-allyl indolyl phenyl carbonates generates 3-allyl-3-phenoxycarbonyl-oxindoles with good catalytic efficiency, which are readily converted into (+/-)-N-benzylcoerulescine and (+/-)-horsfiline. (C) 2010 Elsevier Ltd. All rights reserved.
Reversal of Selectivity in C3-Allylation and Formal [3 + 2]-Cycloaddition of Spiro-epoxyoxindole: Unified Synthesis of Spiro-furanooxindole, (±)-<i>N</i>-Methylcoerulescine, (±)-Physovenine, and 3a-Allylhexahydropyrrolo[2,3-<i>b</i>]indole
作者:Saumen Hajra、Sayan Roy、Subrata Maity
DOI:10.1021/acs.orglett.7b00420
日期:2017.4.21
a formal [3 + 2]-annulation reaction of spiro-epoxyoxindoles have been developed and can be accessed simply by changing the reaction conditions. This method has been successfully employed for the synthesis of spiro(pyrrolidinyloxindole), 3a-allylhexahydropyrrolo[2,3-b]indole, and furanoindoline.
已经开发出有效的路易斯酸催化的区域选择性C 3-烯丙基化和螺-环氧氧吲哚的正式[3 + 2]-环化反应,并且可以通过改变反应条件来简单地获得。该方法已成功地用于合成螺(吡咯烷基二氧杂吲哚),3a-烯丙基六氢吡咯并[2,3- b ]吲哚和呋喃二氢吲哚。
Applications of NHC-mediated O- to C-carboxyl transfer: synthesis of (±)-N-benzyl-coerulescine and (±)-horsfiline
作者:Jennifer E. Thomson、Andrew F. Kyle、Kenneth B. Ling、Siobhan R. Smith、Alexandra M.Z. Slawin、Andrew D. Smith
DOI:10.1016/j.tet.2010.03.047
日期:2010.5
NHC-promoted O- to C-carboxyl transfer of 3-allyl indolyl phenyl carbonates generates 3-allyl-3-phenoxycarbonyl-oxindoles with good catalytic efficiency, which are readily converted into (+/-)-N-benzylcoerulescine and (+/-)-horsfiline. (C) 2010 Elsevier Ltd. All rights reserved.