MADDING, G. D.;THOMPSON, M. D., J. HETEROCYCL. CHEM., 24,(1987) N 3, 581-587
作者:MADDING, G. D.、THOMPSON, M. D.
DOI:——
日期:——
Regioselective syntheses of 2-amino-4,5-dialkylthiophene-3-carboxylates and their conversion to 3,4-dihydro-4-oxothieno[2,3-<i>d</i>]pyrimidine-2-carboxylates
作者:Gary D. Madding、Michael D. Thompson
DOI:10.1002/jhet.5570240309
日期:1987.5
The synthesis of 3,4-dihydro-4-oxothieno[2,3-d]pyrimidine-2-carboxylates via acid catalyzed reactions of various 2-aminothiophene-3-carboxylates with activated nitriles is presented. The requisite thiophenes were prepared regioselectively by methods which represent improvements over previously published procedures.
提出了通过各种2-氨基噻吩-3-羧酸酯与活化腈的酸催化反应合成3,4-二氢-4-氧杂噻吩并[2,3- d ]嘧啶-2-羧酸酯。通过代表对先前公开的方法的改进的方法,选择性地制备必需的噻吩。