AuCl3 catalyzed [3 + 2 + 1] cycloaddition: first use of aldehyde as a carbon monoxide-like one carbon synthon for triple C–C coupling
作者:Krishnanka S. Gayen、Dilip K. Maiti
DOI:10.1039/c3ra47093h
日期:——
A new [3 + 2 + 1] cycloaddition strategy is demonstrated using an aldehyde, an aldimine of a glycine ester and a terminal triple bond with AuCl3 catalyst. Aldehyde is exploited as the first alternative to the crucial partner CO for triple C–C coupled annulation for the synthesis of novel fused-tricyclic heterocycles.
Nitrogen-containing heterocyclic compound having acetal group and method
申请人:Agency of Industrial Science & Technology
公开号:US04287335A1
公开(公告)日:1981-09-01
A novel compound represented by the general formula: ##STR1## [wherein, A is one member selected from the group consisting of ##STR2## (where R.sub.2 and R.sub.3 are each an alkyl group and R.sub.4 is an alkylene group), Y is one member selected from the group consisting of ##STR3## (where R.sub.1 is one member selected from the class consisting of alkyl group, aryl group and aralkyl group)] is obtained by causing a compound of the general formula: ##STR4## (wherein, A and n have the same meaning as described above) to react with a compound of the general formula: Y--CH.sub.3 (wherein, Y has the same meaning as described above).
Maillard; Langlois; Vo Van, European Journal of Medicinal Chemistry, 1983, vol. 18, # 4, p. 353 - 358
作者:Maillard、Langlois、Vo Van、et al.
DOI:——
日期:——
NHC-Catalyzed Reactions of Aryloxyacetaldehydes: A Domino Elimination/Conjugate Addition/Acylation Process for the Synthesis of Substituted Coumarins
作者:Eric M. Phillips、Manabu Wadamoto、Howard S. Roth、Andrew W. Ott、Karl A. Scheidt
DOI:10.1021/ol802448c
日期:2009.1.1
N-Heterocyclic carbenes (NHCs) catalyze a domino Michael addition/acylation reaction to form 3,4 through addition of the NHC to an aryloxyaldehyde followed by elimination of a phenoxide leaving group, generating an enol intermediate. This transient nucleophile generated in situ performs a 1,4-addition onto a conjugate acceptor, and the carbene catalyst Is regenerated upon acylation of the phenoxide anion resulting in formation of 3,4-dihydrocoumarins.