Preparation of Various Carboxylic Acid Esters from Bulky Alcohols and Carboxylic Acids by a New Type Oxidation-reduction Condensation Using 2,6-Dimethyl-1,4-benzoquinone
A new-type oxidation-reduction condensation by using 2,6-dimethyl-1,4-benzoquinone (DMBQ), carboxylic acids and in situ formed alkoxydiphenylphosphines (1) including the bulky alkoxy group-substituted ones proceeded smoothly to afford the corresponding carboxylic acidesters in good to high yields. Alkoxydiphenylphosphines were formed in situ by treating either N,N-dimethylaminodiphenylphosphine (Ph2PNMe2)
Factors in the formation of isomerically and optically pure alkyl halides. Part VI. The preparation of optically pure 2-halogenobutanes
作者:D. G. Goodwin、H. R. Hudson
DOI:10.1039/j29680001333
日期:——
Optically active 2-chloro- and 2-bromo-butane are formed, with little or no loss of enantiomeric purity, by the interaction of hydrogen halide (Cl, Br) with (+)-tri-s-butyl phosphite or (+)-s-butyl diphenylphosphinite. The reactions of optically active butan-2-ol with phosphorus trichloride, dichlorophenylphosphine, or chlorodiphenylphosphine similarly yield opticallypure 2-chlorobutane, although