2-Ethylthiothiazoline was reacted with N-benzoyl-α-amino acids in acetic anhydride to give I. Ia was converted into II, III, IV, and V. The oxazolone ring of Ib and Ic was opened to give XI. XIb was converted into thiazoline (XII) and XIII. These thiazolines were reduced to thiazolidine (XIV) and XV, and then converted into the respective aldehydes, XVI and XVII.
2-乙基
硫代
噻唑啉与 N-苯甲酰基-
α-氨基酸在
乙酸酐中反应生成 I,Ia 转化为 II、III、IV 和 V。XIb 转化为
噻唑啉(XII)和 XIII。这些
噻唑啉被还原成
噻唑烷(XIV)和 XV,然后转化成相应的醛,即 XVI 和 XVII。