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。
The gould-jacob type of reaction for the synthesis of novel pyrimidopyrrolopyrimidines: A comparison of classical heating<i>vs</i>solvent free microwave irradiation
作者:Nirmal D. Desai
DOI:10.1002/jhet.5570430530
日期:2006.9
The Gould-Jacobtype of reaction for the synthesis of ethyl 4-oxo-8,10-substituted-4,8-dihydropyrimido[1,2-c]pyrrolo[3,2-e]pyrimidine-3-carboxylates 5 has been carried out conventionally by the condensation between 4-aminopyrrolo[2,3-d]pyrimidines 2 and diethyl ethoxymethylenemalonate 3 via acyclic intermediates diethyl N-[5,7-substituted-7H-pyrrolo[2,3-d]pyrimidin-4-yl]aminomethylenemalonates 4 and
Synthesis of 5,7-Disubstituted 7H-Pyrrolo[2,3-d]Pyrimidin-4(3H)-ones and Their<i>N</i>-Alkylation's under Phase Transfer Conditions
作者:Chaitanya G. Dave、Killol J. Patel
DOI:10.1002/jhet.1561
日期:2014.7
cyclocondensation of 1,4‐disubstituted 2‐amino‐3‐cyanopyrrole 1 with formic acid. When comparative study of N versus O alkylation of ambident 5,7‐disubstituted 7H‐pyrrolo[2,3‐d]pyrimidin‐4(3H)‐ones 2 was carried out under liquid–liquid PTC, solid–liquidPTC, and solid–liquid solvent free conditions using various alkylating agents 3, the N‐alkylated product 4 were obtained selectively and exclusively.
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.