Synthesis of pyrazolo[1,3,2]diazaphosphinin‐4‐ones

• DOI: 10.1002/hc.21005
• Publication Date: 2012-02-22T04:29:27Z
• Authors: Anatoliy P. March...; Georgiy N. Koidan; Anastasiya S. Hur...; Radomyr V. Smaliy; Aleksandr A. Yurc...; Aleksandr N. Kostyk
• Keywords: Heteroatom; Isocyanate; Carbon atom

Abstract It was found that phosphinimidic isocyanates based on 3‐, 4‐, and 5‐aminopyrazoles could undergo intramolecular heterocyclization to yield previously unknown pyrazolo[1,3,2]diazaphosphorin‐4‐ones containing an endocyclic PN double bond. shown isocyanate 4‐aminopyrazole, in which there are two positions (3 5) available for the cyclization, reacts exclusively at 5‐carbon atom. © 2012 Wiley Periodicals, Inc. Heteroatom Chem 23:210–215, 2012; View this article online wileyonlinelibrary.com . DOI 10.1002/hc.21005