N-[(1S,2S)-2-amino-1,2-diphenylethyl]-N'-benzylthiourea in 1,4-dioxane T=25°C; Michael addition; 55 h; optical yield given as percent eeenantioselective reaction;
(4S)-4-benzyl-1-methylimidazolidine-2-carboxylic acid in tetrahydrofuran T=20°C; Michael addition; 70 h; Product distribution; Further Variations:SolventsReagentsreaction times;