Studies on the chemistry of<i>O,N</i>- and<i>S,N</i>-containing heterocycles. 16. Investigations on the synthesis of new tricyclic β-lactams<i>via</i>[2+2]cycloaddition reaction
作者:Susanne Pippich、Herbert Bartsch、Thomas Erker
DOI:10.1002/jhet.5570340319
日期:1997.5
Starting from methylthioimidates 1–8 a series of corresponding tricyclic β-lactams was synthesized via [2+2]cycloaddition with ketenes generated in situ from substituted acetyl chlorides. Dependent on the bicyclic starting material and on the substituent of the corresponding acetyl chloride N-acetyl derivatives were obtained as by- or sole products.
从甲硫代亚氨酸1-8开始,通过[2 + 2]环加成反应与由取代的乙酰氯就地生成的乙烯酮合成了一系列相应的三环β-内酰胺。取决于双环原料和相应的乙酰氯的取代基,获得N-乙酰基衍生物作为副产物或唯一产物。