作者:Gifford Marzoni、William L. Garbrecht
DOI:10.1055/s-1987-28037
日期:——
A new procedure for alkylating dihydrolysergic acid (1) on the indole nitrogen is reported. Previous procedures involved reaction of the indoyl anion with an alkyl halide. As the alkyl group gets larger, dehydrohalogenation of the alkyl halide becomes the preferred reaction and little or no N 1-alkylation occurs. By using alkyl tosylates in place of alkyl halides, we have been able to alkylate 1 on the indole nitrogen with a wide variety of alkyl groups in high yield.
报道了一种在吲哚氮上烷基化二氢麦角酸(1)的新方法。先前的方法涉及吲哚阴离子与烷基卤化物的反应。随着烷基集团体积的增大,烷基卤化物的脱卤化氢反应成为主要反应,几乎没有或完全没有N-1位烷基化发生。通过使用对甲苯磺酸酯代替烷基卤化物,我们能够以高产率在吲哚氮上对1进行多种烷基集团的烷基化。