Cholewinski G, Chojnacki J, Pikies J, Rachon J. Synthesis and structural investigation of N-acyl selenophosphoramides.
Org Biomol Chem 2009;
7:4095-100. [PMID:
19763317 DOI:
10.1039/b907641g]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2-Amino-2-seleno-5,5-dimethyl-1,3,2-dioxaphosphorinane reacts with acyl chlorides (4-chlorobenzoyl chloride or pivaloyl chloride) yielding the respective N-acyl selenophosphoramides. These derivatives do not isomerise to the related selenocarbonyl imides. X-ray study of N-(4-chlorobenzoyl)-2-amino-2-seleno-5,5-dimethyl-1,3,2-dioxaphosphorinane indicates that the selenium atom is placed in the equatorial position. The next compound studied, N-pivaloyl-2-amino-2-seleno-5,5-dimethyl-1,3,2-dioxaphosphorinane, crystallises with both axial/equatorial conformers present in the asymmetric unit. Finally, 2-amino-2-seleno-5,5-dimethyl-1,3,2-dioxaphosphorinane is present in the solid state in the form with the selenium atom in the axial position. The results are presented together with X-ray structures of previously synthesised and described cyclic O-acyl monoselenophosphates.
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