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The reaction of 4,5-benzo-2-chloro-3-methyl-1,3,2-oxazaphosphorinan-6-one 1 with 1,2-bis- (trimethylsiloxy)ethane led to the bisphosphoryl species 2a and to the isomeric bisphosphite derivative 2b. The reaction of 1 with heptamethyldisilazane furnished the expected diphos­phorus compound 3, with two λ 3 P(III) atoms linked by a methylamino group. Substitution of the chlorine atom of 1 by the 2-chloroethylamino and bis(2-chloroethyl)amino group led to the oxazaphosphorinanones 4 and 6. By oxidation of 4 with the hydrogen peroxide/urea 1:1-adduct, the phosphoryl compound 5 was formed. Oxidation of 4,5-benzo-2-diethyl- amino-3-methyl-1,3,2-oxazaphosphorinan-6-one 7 [1] with hydrogen peroxide, sulfur and se­lenium led to the corresponding phosphoryl, thiophosphoryl and selenophosphoryl com­pounds 8-10. Analogously, the reaction of the dimethylamino- and acetamido-substituted derivatives 11 and 13 [1] with elemental sulfur furnished the thiophosphoryl compounds 12 and 14. X-ray crystal structure determinations of 4 and 14 confirmed the molecular structures, proposed in accord with NMR spectroscopic and mass spectrometric data. The heterocyclic rings are essentially planar. In 14 a hydrogen bond N-H···O (amide) is observed.

zeitschrift für naturforschung b

Beiträge zur Chemie des 4,5-Benzo-3-methyl-1,3,2-oxazaphosphorinan- 6-on Ringsystems: Röntgenstrukturanalysen an einem Bis(2-chlorethyl)amino- und einem Acetamido-substituierten Derivat / Chemistry of the 4,5-Benzo-3-methyl-1,3,2-oxazaphosphorinan-6-one Ring System: X-Ray Crystal Structure Analysis of a Bis(2-chloroethyl)amino- and of an Acetamido-Substituted Derivative