Question

(ii) For this reaction explain the stereoselectivity model that can be used to account for the stereoselectivity observed. t-Bu CH2 H t-Bu CH2 CHYA CI mopba t-Bu C CH2H CH, G minor product CHz CH, CH, major product [5 marks]

Answer 1

{-o-o-H TH t-BU CH₃ +- BUCH 3 ABU CH3 C대 H - CH3 mo minor Mator 95111 Reaction Mechalishy moresteric hindiarance MEBA CH2 +BU CH3 Енз n — l ess steric hindarance NOTE: MCPBA react with akene at less steric hindarance side is most favourable reaction condition to getting distereoselectivity product that means epoxide above the plane product is major-95% and other hand more steric hindarnce MCPBA forbbinden and very less chance to getting below the epoxide prodcut-5%

t-BU а tru Law CH₃ AUCH Хи V id 1 V Major HP 954 st Case +B CH3 ExtBo Chiz che fum Forbbideny CH3 ! Very less chanse 154 -