Preparation and structure of cycloalkane-condensed [1,3]thiazino[3,2-a] pyrimidinones
作者:Pál Sohár、Zsolt Szöke-Molnár、Géza Stájer、Gábor Bernáth
DOI:10.1002/mrc.1260271011
日期:1989.10
Isocyanate salts prepared from cis‐2‐amino‐1‐cyclopentane‐ and ‐hexane‐carboxylate and the corresponding trans‐cyclohexane and ‐cyclohexene derivates with KSCN were cyclized to cycloalkane/ene‐condensed 2‐thioxo‐4‐pyrimidinones, which were transformed to tricyclic 1,3‐thiazino[3,2‐a]pyrimidinones by addition of dimethyl acetylenedicarboxylate. The stereo structures of the new compounds were established
由顺-2-氨基-1-环戊烷-和-己烷-羧酸盐和相应的反式-环己烷和-环己烯衍生物与KSCN制备的异氰酸盐被环化成环烷烃/烯缩合的2-硫代-4-嘧啶酮,然后转化通过加入乙炔二甲酸二甲酯生成三环 1,3-噻嗪并[3,2-a]嘧啶酮。利用质子耦合碳光谱中的信号多重性,通过 IR、1H 和 13C NMR 光谱确定了新化合物的立体结构。