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-transfer conditions were employed in an improved synthesis 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.
液-液相转移条件用于改进合成 7,9-取代的 7H-吡咯并[3,2-e]四唑并[1,5-c]嘧啶和 5,7-取代的 4-氨基-7H-吡咯并[2,3-d]嘧啶。后者通过前者的还原环裂解获得,或者通过从 5,7-取代的 4-氯-7H-吡咯并[2,3-d]嘧啶中一锅合成获得。