A convenient method for constructing novel tetrahydropyrido[4′,3′:4,5]thieno[2,3-d]-pyrimidinones-carbohydrate and amino acid conjugates via copper(I)-catalyzed alkyne-azide ‘Click Chemistry’
摘要:
Novel conjugates of tetrahydropyridothienopyrimidones and carbohydrates of amino acids linked by 1,2,3-triazoles were synthesized After establishing the tetrahydropyridothienopyrimidones ring system by ring closure, propargyl groups were introduced by N-alkylation Cu-catalyzed cycloaddition of the propargyl products with azido group containing hexoses or amino acids gives the corresponding 1,2,3-triazoles in high yields This methodology also allowed attaching two carbohydrate molecules to the tetrahydropyridothienopyrimidone core Interesting dependence of the regioselectivity of the N-propargylation of the pyrimidone ring oil the exocyclic substituent found adjacent to the pyrimidine-N-atom was observed A remarkable case of a non-catalyzed intramolecular [3+2]-cycloaddition of an alkyne with ail azide to a 1,2,3-triazole was observed. which occurred in the solid state at it or below (C) 2010 Elsevier Ltd All rights reserved
A convenient method for constructing novel tetrahydropyrido[4′,3′:4,5]thieno[2,3-d]-pyrimidinones-carbohydrate and amino acid conjugates via copper(I)-catalyzed alkyne-azide ‘Click Chemistry’
摘要:
Novel conjugates of tetrahydropyridothienopyrimidones and carbohydrates of amino acids linked by 1,2,3-triazoles were synthesized After establishing the tetrahydropyridothienopyrimidones ring system by ring closure, propargyl groups were introduced by N-alkylation Cu-catalyzed cycloaddition of the propargyl products with azido group containing hexoses or amino acids gives the corresponding 1,2,3-triazoles in high yields This methodology also allowed attaching two carbohydrate molecules to the tetrahydropyridothienopyrimidone core Interesting dependence of the regioselectivity of the N-propargylation of the pyrimidone ring oil the exocyclic substituent found adjacent to the pyrimidine-N-atom was observed A remarkable case of a non-catalyzed intramolecular [3+2]-cycloaddition of an alkyne with ail azide to a 1,2,3-triazole was observed. which occurred in the solid state at it or below (C) 2010 Elsevier Ltd All rights reserved
Click Chemistry Based Synthesis of Novel Architectures Bearing Sugar Unit at the Pyridothienopyrimidines
作者:Mohamed A. Ameen、Essam Kh. Ahmed、Tamer El Malah、Hisham A. Abd El-naby、Areeg A. Abdel-Kader
DOI:10.1002/jhet.2202
日期:2015.7
Novel conjugates of pyridothienopyrimidinones and carbohydrates or other moieties linked by 1,2,3‐triazoles were synthesized. After establishing the pyridothienopyrimidone ring systems by ring closure, propargyl group was introduced by O‐alkylation or N‐alkylation. Cu‐catalyzed cycloaddition of the propargyl product with azido group gave the corresponding 1,2,3‐triazoles in high yields. A remarkable