在Gewald反应条件下,由(2-溴-1-芳基亚烷基)丙二腈1与氟芳基取代的芳族胺反应合成了一些氟芳基取代的2-氨基-3-氰基吡咯2,与甲酰胺和甲酸反应生成4-氨基吡咯并[2,3- d ]嘧啶3和吡咯并[2,3 - d ]-嘧啶-4(3H)-一4。4-氯代吡咯并[2,3- d ]嘧啶5是通过四氯氧磷氯化制备的,在肼解作用下提供了4-肼基吡咯并[ 2-3 - d ]嘧啶6。
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.