Stereochemistry of organophosphorus cyclic compounds—I
作者:M. Mikołajczyk、J. Łuczak
DOI:10.1016/s0040-4020(01)93865-7
日期:1972.1
Geometrical isomers of 2-hydroxy-2-thio-4-methyl-1,3,2-dioxaphosphorinan (I) and 2- hydroxy-2-seleno-4-methyl-1,3,2-dioxaphosphorinan (V) have been prepared stereospecifically by : (a) demethylation of cis- and trans-2-methoxy-2-thio-4-methyl-1,3,2-dioxaphosphorinan (IV) and 2-methoxy- 2-seleno-4-methyl-1,3,2-dioxaphosphorinan (VI) with trimethylamine, and (b) addition of sulphur and selenium to geometrical
Stereochemistry of organophosphorus cyclic compounds—III
作者:W. Stec、A. Łopusiński
DOI:10.1016/0040-4020(73)80007-9
日期:1973.1
On the basis of chemical transformations and spectroscopic data the cis- and trans-geometry was assigned to the previously reported diastereoisomeric 2-N-phenylamino-2-oxo-4-methyl-1,3,2-dioxaphosphorinans (1). The addition of phenyl azide to cyclic phosphite (3) as well as the reaction of the resulting adduct (4) with carbon disulphide or benzoic acid takes place with overall retention of configuration
Phosphorus substituted 4-methyloxetan-2-ones, processes for their
申请人:Ciba-Geigy Corporation
公开号:US04384966A1
公开(公告)日:1983-05-24
Compounds having the formula ##STR1## are described, wherein X is oxygen or sulphur or the moiety X is absent and A and D are as defined in claim 1. Compounds I may be prepared by reacting a compound ##STR2## with diketene in the presence of an agent capable of forming free radicals. They are useful as friction modifiers and/or antiwear additives in lubricating oils or for imparting flame-retardancy to natural or synthetic polymers.