Ca(oCIa/HOAc/H2O (I) H3C-C=CH-CH H3C NBS/H2O HBr/Bz,O, (3)cH3C≡CH OH 48%HBr (5) CH2CH=CHCH2 CH=CHBr ImolBr,/CClg CH2=CH-CO0-CH-CH2 (CH3)2C=CHCH2CH=CHH3C C CH CH3 H3C Ca(OCl)2 /HOAc/H2O (1) (2) (3) (4) (5) HC CH2 NBS/H2O CH3 C CH 2HBr/Bz2O2 OH 48%HBr CH2CH=CHCH2CH=CHBr CH2=CH-COO-CH-CH2 (CH3 )2C=CHCH2CH=CH2 1molBr2 /CCl4