ChOna BrCH,CH,Br (4)CHyCOCH2 CO0C2Hs CH3COCHCOOC2Hs C2H5ONG CH3 COCHCOOC?Hs CH3COCCoOC2Hs CH-CH2Br CH,, Br 5% NaOH D-COCH3 COnChS H2sO B C2HSOH CH=CH3 2 BrCHCHgBr (5)c2QB、H2SO4,H2-Ch B KOH HCmCH H OH NaNH, CHal HC E CN HC CCHy Lindl ROOR 2H5ONa CH3 COCH,C00C,Hs CH3COCHCOOC Hs