Alkylation a to C=O C-alkylation preferred CH2CH(CH3)2 1)LDA in THF 2)(CH3)CHCH2Br ⊕Alkylation a to C=O C-alkylation preferred O H 1) LDA in THF 2) (CH3) 2 CHCH2 Br O CH2 CH(CH3) 2 O Li Br