Asymmetric synthesis of isohaliclorensin, a key intermediate of bisquinolinylpyrrole alkaloid halitulin
摘要:
A new enantioselective total synthesis of N-(3'-aminopropyl)-3-methylazacyclodecane, a partial structure of halitulin, has been achieved in eight steps with 14% overall yield. The key steps are the photochemical ring-expansion reaction of spirooxaziridine to lactam for constructing the azacyclodecane moiety and 1,4-stereoinductive methylation of the resulting lactam. (C) 2002 Elsevier Science Ltd. All rights reserved.
Asymmetric synthesis of isohaliclorensin, a key intermediate of bisquinolinylpyrrole alkaloid halitulin
摘要:
A new enantioselective total synthesis of N-(3'-aminopropyl)-3-methylazacyclodecane, a partial structure of halitulin, has been achieved in eight steps with 14% overall yield. The key steps are the photochemical ring-expansion reaction of spirooxaziridine to lactam for constructing the azacyclodecane moiety and 1,4-stereoinductive methylation of the resulting lactam. (C) 2002 Elsevier Science Ltd. All rights reserved.
Callyazepin and (3<i>R</i>)-Methylazacyclodecane, Nitrogenous Macrocycles from a <i>Callyspongia</i> sp. Sponge
作者:Chang-Kwon Kim、Jung-Kyun Woo、Yeon-Ju Lee、Hyi-Seung Lee、Chung J. Sim、Dong-Chan Oh、Ki-Bong Oh、Jongheon Shin
DOI:10.1021/acs.jnatprod.5b01078
日期:2016.4.22
analyses revealed that the structure of 1 is a bicyclic azepane ammonium salt of a novel structural class derived from mixed biogenetic origins. The configuration of the whole molecule and the conformation of the formamide group were assigned by proton–proton coupling constants, a NOESY analysis, and the application of the phenylglycine methyl ester method. The structure of 2 was identified using combined
A new enantioselective total synthesis of N-(3'-aminopropyl)-3-methylazacyclodecane, a partial structure of halitulin, has been achieved in eight steps with 14% overall yield. The key steps are the photochemical ring-expansion reaction of spirooxaziridine to lactam for constructing the azacyclodecane moiety and 1,4-stereoinductive methylation of the resulting lactam. (C) 2002 Elsevier Science Ltd. All rights reserved.