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Communication | Special issue | Vol 33, No. 1, 1992, pp.131-134
Published online, 1st January, 1970
DOI: 10.3987/COM-91-S51
New Condensing Reagents: Thiophosphorus Compounds Activated by 2-Oxazolone and 2-Benzoxazolinone Heterocycles

Teruyuki Otsubo, Chiyoko Matsukawa, Tadao Ishizuka, and Takehisa Kunieda*

*Faculty of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-hon-machi, Kumamoto 862-0973, Japan

Abstract

The thiophosphorus compounds (3-6 ) activated by 2-oxazolone and 2-benzoxazolinone heterocycles, which have the advantages of high solubility in organic solvents and good preservability, serve well as versatile condensing reagents for one-step formation of amides including β-lactams, esters and thioesters from carboxylic acids.