A) 1) HCECH, NaNH2 2) (CH3)2CHCH2Br 3) aqueous H2SO4, cat. HgSO4 ? B) c) 1) CH3CECH, NaNH2 2) (CH3)2CHBr 3) Disiamylborane D) 4) H₂O₂, NaOH 1) CH3C CH, NaNH2 2) (CH3)2CHCH2Br 3) BH3⚫THF 4) H2O2, NaOH E) 1) (CH3)2CHBr, NaNH, 2) CHCECH 3) 03 4) H₂O 1) (CH3)2CHCH2Br, NaNH2 2) HCECH 3) 9-BBN 4) H₂O₂, NaOH