sodium tetrahydroborate; chloroformic acid ethyl ester; triethylamine 1. THF, -10 deg C, 30 min 2. a. H2O, 5-10 deg C b. 3h, room temperature; Yield given. Multistep reaction;

sodium dichromate; sulfuric acid in dimethyl sulfoxide 1. 50 deg C 2. 1h 70 deg C;