Intermediates for the synthesis of debromohymenialdisine and processes thereof
申请人:The Trustees of Columbia University in the City of New York
公开号:US06197954B1
公开(公告)日:2001-03-06
The synthesis of C11N5 marine sponge alkaloids (±)-hymenin (1), stevensine (2), hymenialdisine (3), and debromohymenialdisine (4) is described. These natural products are the primary family members of the sponge metabolites that contain a fused pyrrolo[2,3-c]azepin-8-one ring system with either a 2-aminoimidazole (AI) or glycocyamidine appendage. The key steps in the synthesis centered around the generation of novel azafulvenium ions and their regioselective heterodimerization with AI in order to create the tricyclic core. A rarely used protodebromination/oxidation strategy was employed to selectively generate the desired a-bromo substitution pattern seen in hymenialdisine (3). In addition, the AI moiety was shown to be a useful precursor to the glycocyamidine unit found in 3 and 4, which suggests that AI derived natural products may be the biogenic forerunners to glycocyamidine metabolites.
作者:Ying-zi Xu、Giao Phan、Kenichi Yakushijin、David A. Horne
DOI:10.1016/0040-4039(94)85051-8
日期:1994.1
(±)-Hymenin (1) has been synthesized by a highly efficient route involving the generation of an azafulvene intermediate and its coupling with 2-aminoimidazole.
(±)-处女膜素(1)已经通过涉及氮杂富烯中间体的产生及其与2-氨基咪唑的偶联的高效途径合成。
Intermediates for the synthesis of debromohymenialdisine and process thereof
申请人:The Trustees of Columbia University in the City of New York
公开号:US20010012891A1
公开(公告)日:2001-08-09
The synthesis of C
11
N
5
marine sponge alkaloids (±)-hymenin (1), stevensine (2), hymenialdisine (3), and debromohymenialdisine (4) is described. These natural products are the primary family members of the sponge metabolites that contain a fused pyrrolo[2,3-c]lazepin-8-one ring system with either a 2-aminoimidazole (AI) or glycocyamidine appendage. The key steps in the synthesis centered around the generation of novel azafulvenium ions and their regioselective heterodimerization with AI in order to create the tricyclic core. A rarely used protodebromination/oxidation strategy was employed to selectively generate the desired a-bromo substitution pattern seen in hymenialdisine (3). In addition, the AI moiety was shown to be a useful precursor to the glycocyamidine unit found in 3 and 4, which suggests that AI derived natural products may be the biogenic forerunners to glycocyamidine metabolites.