Indolo[2,3-a]quinolizines 3 were stereoselectively synthesized by the intramolecular double Michael reaction of amide esters 2, the indole nitrogen of which was protected with a tosyl group, using ButMe2SiOSO2CF3 in the presence of Et3N.
吲哚并[2,3-一个]喹嗪类3被立体选择性地由酰胺酯的分子内双迈克尔反应合成2,吲哚氮,其中用甲苯磺酰基保护时,使用卜吨我2 SiOSO 2 CF 3在Et的存在3 N.
Models of folate cofactors 20. an approach to deethyleburnamonine
作者:Axel R. Stoit、Upendra K. Pandit
DOI:10.1016/0040-4020(89)80116-4
日期:1989.1
The substituted 5,10-methylenetetrahydrofolate model (3a) derived from addition of the dianion of dimethyl 2-methoxycarbonylglutarate to 1,5,5-trimethyl-3-tosyl-1-imidazolidinium iodide (1) transfers a 7-carbon functionalized fragment to tryptamine to yield precursors of deethylepieburnamonine and deethyleburnamonine.