A new synthesis of 4-cyano-1,3-dihydro-2-oxo-2<i>H</i>-imidazole-5-(N<sup>1</sup>-tosy1)carboxamide : reactive precursor for thiopurine analogues
作者:Abdel-Sattar S. Hamad、Hamed D. A. Y. Derbala
DOI:10.1002/jhet.5570380420
日期:2001.7
base to give 7,8-dihy-dro-2-(4-nitrophenyl)-8-oxo-9-tosylpurine-6-carboxamide 8. Thiation of compounds 3 and 8 using Lawesson's reagent in tetrahydrofuran gave novel thioimidazoles 4, 5, and 6 and thiopurines 9, 10, and 11, which have been characterized spectroscopically.
ñ - [(5-氰基-2-氧代咪唑烷-4-基)-iminomethyl] - p -toluensulfonamide 3用的碱催化环化在相当好的产率制备Ñ [(Z)-2-氨基-1,2- - -双氰基戊基氨基甲酰基]-对甲苯磺酰胺2。在室温下,在碱的存在下,使N -[(Z)-2-氨基-1,2-二氰基壬基氨基甲酰基]-对甲苯磺酰胺2易于与两个摩尔量的对硝基苯甲醛反应,得到7,8-二氢-dro-2-(4-硝基苯基)-8-氧代-9-甲苯磺嘌呤-6-羧酰胺8。化合物3和8的硫杂在四氢呋喃中使用Lawesson试剂,可以得到新的硫代咪唑4、5和6以及硫代嘌呤9、10和11,它们已通过光谱表征。