<i>N</i>-CYANOIMIDO-PHOSPHONYL/<i>S</i>-METHYL THIOCARBONATES: FACILE, USEFUL REAGENTS FOR THE SYNTHESES OF HETEROCYCLIC PHOSPHONATES
作者:Fangzhong Hu、Huazheng Yang
DOI:10.1081/scc-100108232
日期:2001.1.1
N-Cyanoimido-(O,O-dialkyl) phosphonyl/S-methyl thiocarbonates 2 were synthesized as facile, useful synthons for preparation of 1,3,5-triazine-, 1,2,4-triazole-, and 1,2,4-oxadiazole-phosphonates through cyclization reaction with various binucleophilic reagents. In addition, when 2a was treated with o-phenylenediamine, benzimidazole-2-yl phosphonate was obtained through addition–elimination reaction.
N-氰基亚胺基-(O,O-二烷基)膦酰基/S-甲基硫代碳酸酯 2 被合成为方便、有用的合成子,用于制备 1,3,5-三嗪-、1,2,4-三唑-和 1,2 ,4-恶二唑膦酸酯通过与各种亲核试剂的环化反应生成。此外,当2a用邻苯二胺处理时,通过加消反应得到苯并咪唑-2-基膦酸酯。