Conformations of saturated six-membered ring phosphorus heterocycles. III. PMR studies of 2-alkyl-and 2-phenyl-5-tert-butyl-1, 3, 2-dioxaphosphorinanes

WG Bentrude, HW Tan, KC Yee

Index: Bentrude,W.G. et al. Journal of the American Chemical Society, 1975 , vol. 97, p. 573 - 582

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Citation Number: 44

Abstract

Results Syntheses. Compounds 3-6 were readily prepared by reaction of 2-tert-butyl-1, 3- propanediol with the corresponding dichlorophosphine, RPC12, in the presence of Et3N. Vacuum distillation gave nonequilibrium cis-trans mixtures of pure 3-6. Ratios of isomers were determined by integration of the 5-t-Bu pmr resonances and by 31P spectroscopy. Stereospecific, retentive6 N204 oxidation of each of 3-6 gave the corresponding isomeric ...