Abstract
The present review considers all the literature data on methods developed for the synthesis of 1,3,2-diazaphosphinine systems starting from their appearance up to end 2018. The described main methods depended on the cyclization of 1,3-diamines, 1,2-aminoamide (beta-aminoamide) and 1,2-aminonitrile (beta-aminonitrile) compounds with phosphorus halides and sulfides.