Preparation of alkyl aryl sulfides from alcohols and arenethiols such as 2-sulfanyl-1,3-benzothiazole (BtzSH) is described by a new type of oxidation–reduction condensation using phenyl diphenylpho...
Stereospecific C–S Bond Formation from Chiral Tertiary Alcohols by Quinone-Mediated Oxidation–Reduction Condensation Using Alkyl Diphenylphosphinites and Its Application to the Synthesis of a Chiral Tertiary Thiol
Oxidation–reduction condensation between 2-sulfanyl-1,3-benzothiazole (Btz-SH) and the alkyl diphenylphosphinites 1, prepared from tertiary alcohols, proceeded smoothly in the presence of 2,6-di-t-...
A convenient two-step procedure for the construction of sulfur-containing quaternary centers from tert-alcohols involving chiral ones is established. tert-Alkyl diphenylphosphinites 1 were easily prepared in excellent yields from tert-alcohols and ClPPh2 by the combined use of Et3N and a catalytic amount of DMAP. Subsequent condensation of 1 with thiol 3 smoothly proceeded in the presence of quinone 2d to afford the corresponding tert-alkyl sulfides 4 in good to high yields via SN2 displacement. Removal of benzothiazol-2-yl group of (R)-4j was achieved with LiAlH4 to afford the desired chiral thiol (R)-5 in high yield.