An Acylation CH3 CH3 CH3CH2CHCH2CCI CCH2CH2CHCH TiCl4 in CH2Cl2 HCI CH3 CH3An Acylation CH3 CH3 C H3 C H2 C H2 C H2 CCl O TiCl 4 in CH2 C l2 CCH2 CH2 CH2 CH3 CH3 O CH3 + HCl