(a) (1) 1-chloroethyl chloroformate, 1,2-dichloroethane, reflux; (2) MeOH reflux; (b) "p"-toluenesulfonyl chloride,
triethylamine; (c) LiAlH4, THF, rt; (d) trifluoromethanesulfonic anhydride, pyridine, CH2Cl2; (e) Na, sesamol, THF; (f) 5% Na/Hg amalgam, Na2HPO4, MeOH.