Reaction of thioureidomethylenebisphosphonic acids with α-haloketones: I. Effect of substituents on the reaction pathway
作者:A. L. Chuiko、L. P. Filonenko、M. O. Lozinskii
DOI:10.1134/s1070363209010095
日期:2009.1
Substituted thioureidomethylenebisphosphonic acids react with haloketones to form thiazoles. The cyclization direction is predictably controlled by the size of the substituent. The NMR spectra of the resulting isomeric tetrazoles have well-defined differences and allow reliable structural assessment of the products.