In previous papers2 the hydrogenolysis of monothioacetals and monothioketals by" mixed hydride'la (lithium aluminum hydride-aluminum chloride in a 1: 4 ratio) in ether solution was de~ cribed.~ Reduction of 1, 3-oxatbiolanes and 1, 3-oxathianes leads to P-hydroxyethyl and y-hydroxypropyl sulfides, respectivelyza (eq 1), while 2-tetrahydrofuranyl and 2- tetrahydropy-
