Diastereoselective syntheses of 3-aryl-(S/R)-6-methyl-1-[(S/R)-1-phenylethyl)]-2-thioxotetrahydro pyrimidin-4(1H)-ones were achieved in good yields by the condensation of aryl isothiocyanates with ethyl 3-(1-phenylethylamino)butanoate in a one-pot reaction. Benzylation of these substrates illustrated that the orientations of the exocylic and endocylic groups determine the stereochemical outcome of the product formed.
通过芳基异
硫氰酸酯与 3-(1-苯基乙基
氨基)
丁酸乙酯的单锅缩合反应,实现了 3-芳基-(S/R)-6-甲基-1-[(S/R)-1-苯基乙基)]-2-
硫代四氢
嘧啶-4(1H)-酮的非对映选择性合成,收率良好。这些底物的苄化反应表明,外环基团和内环基团的取向决定了所形成产物的立体
化学结果。