Extending Pummerer Reaction Chemistry: (±)-Dibromoagelaspongin Synthesis and Related Studies
作者:Ken S. Feldman、Matthew D. Fodor
DOI:10.1021/jo900283g
日期:2009.5.1
The sponge-derived alkaloid dibromoagelaspongin was prepared from a dihydrooroidin derivative by exploiting the Pummerer reaction twice in succession. Oxidative cyclization of the substrate’s pyrrole-2-carboxamide function into the imidazole moiety was achieved in a regiospecific manner to establish both C−N bonds to C(6) of the target.
Synthesis of Dibromophakellin, Dibromophakellstatin, and Dibromoagelaspongin via Oxidative Cyclization of Dihydrooroidin Derivatives
作者:Ken Feldman、Matthew Fodor、Amanda Skoumbourdis
DOI:10.1055/s-0029-1216939
日期:2009.9
putative biosynthesis proposal for oroidin-derived marine alkaloids serves as a template for developing a biomimetic strategy for the syntheses of tetracyclic members of the phakellin family of sponge metabolites. Pummerer chemistry triggers the oxidative cyclization of the dihydrooroidin derivative, and dibromophakellin, dibromophakellstatin, and dibromoagelaspongin all can be accessed efficiently via
Successful syntheses of 2,4-dichlorophenyl 2-(1-methyl-5-imidazolyl)ethyl and 2,4-dichlorophenyl 3-(1-methyl-5-imidazolyl)propyl ketones are described. In addition, syntheses of 2,4-dichlorophenyl and 4-chlorophenyl 3-(1-methyl-1H-5-tetrazolyl)propyl ketones are reported.
描述了成功合成2,4-二氯苯基2-(1-甲基-5-咪唑基)乙基和2,4-二氯苯基3-(1-甲基-5-咪唑基)丙基酮。另外,据报道合成了2,4-二氯苯基和4-氯苯基3-(1-甲基-1 H -5-四唑基)丙基酮。