Addition reactions of heterocyclic compounds. Part 77. Reaction of dimethyl acetylenedicarboxylate with 2- and 3-alkyl substituted indoles and the formation of (1 + 1 DMAD–CH<sub>4</sub>O) adducts
作者:Roy M. Letcher、Michael C. K. Choi、R. Morrin Acheson、Richard J. Prince
DOI:10.1039/p19830000501
日期:——
Dimethyl acetylenedicarboxylate (DMAD) adds to 1,3-dimethylindole in moist acetic acid to give 2-substituted adducts. The dienone formulation for a product from 1,2,3-trimethylindole and DMAD has been confirmed by making use of proton-coupled 13C n.m.r. spectra. The generality of the formation of this (1 + 1 DMAD-CH4O) adduct is shown by the preparation of a further five new dienones including two
乙炔二羧酸二甲酯(DMAD)在潮湿的乙酸中加到1,3-二甲基吲哚中,生成2-取代的加合物。由1,2,3-三甲基吲哚和DMAD制成的产品的二烯酮配方已通过使用质子耦合的13 C nmr光谱得到证实。制备另外五个包括二个双环[9,3,1]五羟基十六烷二酮的新的二烯酮显示了这种(1 +1 DMAD-CH 4 O)加合物形成的一般性。