Synthesis of isoascididemin, a regioisomer of the marine alkaloid ascididemin
摘要:
The synthesis of isoascididemin, a regioisomer of the naturally occurring ascididemin, has been completed in nine steps from 2,5-dimethoxyaniline. The key steps feature a selective palladium(O)-catalyzed cross-coupling reaction of 6-bromo-5,8-dimethoxy-4-[(trifluoromethanesulfonyl)oxy]quinoline with N-(tert-butoxycarbonyl)-2-(trimethylstannyl)aniline promoted by Cu(I) and a hetero-Diels-Alder reaction of a quinoline-5,8-dione with acrolein N,N-dimethylhydrazone.
GOMEZ-BENGOA, ENRIQUE;ECHAVARREN, ANTONIO M., J. ORG. CHEM., 56,(1991) N1, C. 3497-3501
作者:GOMEZ-BENGOA, ENRIQUE、ECHAVARREN, ANTONIO M.
DOI:——
日期:——
Assembly of pentacyclic pyrido[4,3,2-mn]acridin-8-ones via a domino reaction initiated by Au(I)-catalyzed 6-endo-dig cycloisomerization of N-propargylaminoquinones
作者:Hao Yin、Fanji Kong、Shaozhong Wang、Zhu-Jun Yao
DOI:10.1016/j.tetlet.2012.10.065
日期:2012.12
A novel methodology taking advantage of a domino reaction initiated by an Au(I)-catalyzed 6-endo-dig cycloisomerization under silver-free condition was developed to prepare pentacyclic pyrido[4,3,2-mn]acridin-8-ones from N-propargylaminoquinones. Triphenylphosphinegold(I) chloride in combination with TFA was firstly employed and displayed excellent catalytic efficiency in the domino reaction. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis of isoascididemin, a regioisomer of the marine alkaloid ascididemin
作者:Enrique Gomez-Bengoa、Antonio M. Echavarren
DOI:10.1021/jo00011a011
日期:1991.5
The synthesis of isoascididemin, a regioisomer of the naturally occurring ascididemin, has been completed in nine steps from 2,5-dimethoxyaniline. The key steps feature a selective palladium(O)-catalyzed cross-coupling reaction of 6-bromo-5,8-dimethoxy-4-[(trifluoromethanesulfonyl)oxy]quinoline with N-(tert-butoxycarbonyl)-2-(trimethylstannyl)aniline promoted by Cu(I) and a hetero-Diels-Alder reaction of a quinoline-5,8-dione with acrolein N,N-dimethylhydrazone.