Concise syntheses of the 1,7-dihydropyrano[2,3-g]indole ring system of the stephacidins, aspergamides and norgeamides
作者:Alan W. Grubbs、Gerald D. Artman、Robert M. Williams
DOI:10.1016/j.tetlet.2005.10.112
日期:2005.12
towards the synthesis of the 1,7-dihydropyrano[2,3-g]indole ring system of the stephacidins, paraherquamides and norgeamides have been investigated. The first involves a tandem nitrene insertion/aromatic Claisen rearrangement. The second consists of a more conventional approach from commercially available 6-benzyloxyindole. The third approach is a revised synthesis of the 2-prenylated pyrano indole necessary
已经研究了三种合成Stephacidins,对乙酰氨基甲酰胺和降冰酰胺的1,7-二氢吡喃并[2,3- g ]吲哚环系统的方法。第一个涉及串联的氮烯插入/芳族克莱森重排。第二种是由可商购的6-苄氧基吲哚得到的更常规的方法。第三种方法是对仿生的狄尔斯-阿尔德方法进行仿生的狄斯卡德-阿德耳方法的合成合成,其中所述方法是对步冬青素,天冬酰胺和降冰片酰胺的仿生。