Synthesis of 3-hydroxyindolin-2-one alkaloids, (±)-donaxaridine and (±)-convolutamydines A and E, through enolization–Claisen rearrangement of 2-allyloxyindolin-3-ones
摘要:
Claisen rearrangement triggered by enolization of 2-allyloxyindolin-3-ones with DBU was performed in order to prepare 3-allyl-3-hydroxyindolin-2-ones. Total synthesis of 3-hydroxyindolin-2-one alkaloids, (+/-)-donaxaridine, as well as (+/-)-convolutamydines A and E , was achieved by transformation of the allyl moiety of 3-allyl-3-hydroxyindolin-2-ones. (C) 2004 Elsevier Ltd. All rights reserved.
Synthesis of 3-hydroxyindolin-2-one alkaloids, (±)-donaxaridine and (±)-convolutamydines A and E, through enolization–Claisen rearrangement of 2-allyloxyindolin-3-ones
摘要:
Claisen rearrangement triggered by enolization of 2-allyloxyindolin-3-ones with DBU was performed in order to prepare 3-allyl-3-hydroxyindolin-2-ones. Total synthesis of 3-hydroxyindolin-2-one alkaloids, (+/-)-donaxaridine, as well as (+/-)-convolutamydines A and E , was achieved by transformation of the allyl moiety of 3-allyl-3-hydroxyindolin-2-ones. (C) 2004 Elsevier Ltd. All rights reserved.
Total Synthesis of (+)-Perophoramidine and Determination of the Absolute Configuration
作者:Haoxing Wu、Fei Xue、Xue Xiao、Yong Qin
DOI:10.1021/ja1070043
日期:2010.10.13
migration of the amidine moiety in 37, which guarantees a regioselective methylation on N(1) at the end of the synthesis. The absolute configuration of (+)-perophoramidine was determined by X-ray crystallographic analysis of the chiral intermediate 32 and comparison of the rotation of synthetic (+)-perophoramidine with that of the natural product.