Synthesis and Conformational Analysis of Six-Membered Cyclic Phenyl Phosphites
摘要:
A procedure for synthesizing potentially anancomeric equatorial phenyl phosphites (cis-l and eq-cis-2) is reported. Spectral characteristics and low-temperature NMR studies on the phenyl phosphites suggest that eq-cis-a is a system with a predominant chair conformation in solution. On the contrary, cis-l is conformationally heterogeneous.
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
Bis(trimethylsilyl)peroxide as a versatile reagent for selective generation of oxyphosphoryl group
作者:L. Woźniak、J. Kowalski、J. Chojnowski
DOI:10.1016/s0040-4039(00)94999-2
日期:1985.1
Bis(trimethylsilyl)peroxide, Me3SiOOSiMe3, (BSPO) oxidizes phosphines and phosphites to respective oxyphosphoryl derivatives with retention of the configuration at the phosphorus atom. It also converts thiophosphory] function to oxyphosphoryl function with inversion of the configuration at phosphorus. High yields and high stereoselectivities of these processes render them useful for the synthetic application