Improved Synthesis and Efficient Chemoselective Reduction<b> </b>of Fused Tetrazoles under Phase-Transfer Conditions
作者:Nirmal Desai、Rina Shah
DOI:10.1055/s-2006-950206
日期:——
Liquid-liquid phase-transferconditions were employed in an improvedsynthesis of 7,9-substituted 7H-pyrrolo[3,2-e]tetrazolo[1,5-c]pyrimidines and 5,7-substituted 4-amino-7H-pyrrolo[2,3-d]pyrimidines. The latter were obtained either by reductive ring cleavage of the former, or by one-pot synthesis from 5,7-substituted 4-chloro-7H-pyrrolo[2,3-d]pyrimidines.