1: 88 percent 2: LiBr / dimethylsulfoxide / Heating 3: LDA 4: 95 percent / H2 / Lindlar's catalyst 5: Bu3SnH, AIBN / benzene / Heating; other gem-diethoxy-substituted unsaturated esters View Scheme

1: 88 percent / LiAlH4 2: 88 percent 3: LiBr / dimethylsulfoxide / Heating 4: LDA 5: 95 percent / H2 / Lindlar's catalyst 6: Bu3SnH, AIBN / benzene / Heating; other gem-diethoxy-substituted unsaturated esters View Scheme

1: LiBr / dimethylsulfoxide / Heating 2: LDA 3: 95 percent / H2 / Lindlar's catalyst 4: Bu3SnH, AIBN / benzene / Heating; other gem-diethoxy-substituted unsaturated esters View Scheme

(i) NaH, Et2O, (ii) /BRN= 1735829/; Multistep reaction;

2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride in benzene Heating;