A facile one-pot synthesis of novel substituted 1,2,3,4-tetrahydropyrimidines Part 5 : Synthesis of bis[(l-alkyl/aralkyl)-5-benzoyl-6-methylthio-1,2,3,4-tetrahydropyrimidinyl]alkane and benzene, bis[3-phenyl-7-methyl-4,5,6,7-tetrahydropyrazolo[3,4-<i>d</i>]-pyrimidinyl]alkane and bis[1-benzyl-7-phenyl-1,2,3,4-tetrahydro-pyrazolo[1,5-<i>a</i>]triazinyl]alkane and benzene
作者:Milan Ch. Dutta、Kaushik Chanda、Jai N. Vishwakarma、Philippe Helissey
DOI:10.1002/jhet.5570420535
日期:2005.7
reaction of N,S-acetals with formaldehyde and diamines. Reaction of pyrazoles 3a and 3b with diamines and formaldehyde yield bis-4,5,6,7-tetrahydropyrazolo[3,4-d]pyrimidinylalkanes 4a-b and bis-1,2,3,4-tetrahydropyrazolo[1,5-a]triazinylalkanes and benzene 5a-c respectively in good yields.
通过N,S-缩醛与甲醛和二胺的反应合成了双1,2,3,4-四氢嘧啶基烷烃/苯2a-f。吡唑3a和3b与二胺和甲醛反应生成双-4,5,6,7-四氢吡唑并[3,4- d ]嘧啶基烷烃4a-b和双1,2,3,4-四氢吡唑并[1,5- a ]三嗪基烷烃和苯5a-c分别具有良好的收率。