Synthesis of 4-alkyl-1-benzhydryl-2-(methoxymethyl) azetidin-3-ols by regio-and stereoselective alkylation of 1-benzhydryl-3-(N-alkyl) imino-2-(methoxymethyl) …
…, M Boeykens, C Gauthier, JP Declercq, N De Kimpe
The regio-and stereoselective alkylation at the position C-4 of 1-alkyl-2-substituted azetidin- 3-ones was investigated. Imination of 1-benzhydryl-2-methoxymethylazetidin-3-one, followed by alkylation under kinetic conditions and final hydrolysis of the imino group, gave 4-alkyl-1-benzhydryl-2-methoxymethylazetidin-3-ones in which the susbstituents at C-2 and C-4 had the cis stereochemistry. The reduction of the carbonyl group afforded the ...