Direct Phosphorylation of<i>N</i>-Protected Imidazoles and Benzoimidazoles-A Route to 1<i>H</i>-Imidazol(benzoimidazol)-2-yl Phosphonic and Phosphinic Acids and Their Derivatives
作者:Igor V. Komarov、Aleksandr V. Strizhak、Mikhail Yu.Kornilov、Aleksandr N. Kostyuk、Andrey A. Tolmachev
DOI:10.1080/00397919808004288
日期:1998.7
Synthetic approaches to 1H-imidazol-2-yl and 1H-benzoimidazol-2-yl phosphinic and phosphonic acids and their derivatives are reported, based on phosphorylation of N-protected heterocylcles by PhPOCl2 or MePOCl2. Reaction of N-alkylbenzoimidazoles with POCl3 did not lead to C-phosphorylated products in a reasonable yield, [2,2']-bis-benzoimidazolyles being formed instead.