(E)-2-Benzoylamino-4-[7,8-dihydro-5H-[1,3]dioxolo[4,5-g]quinolin-(6E)-ylidene]-pent-2-enedioic acid 5-ethyl ester 在
乙酸酐 、
溶剂黄146 作用下,
反应 5.0h,
生成 2-Benzoylamino-1-oxo-5,6-dihydro-1H-8,10-dioxa-11b-aza-cyclopenta[b]phenanthrene-4-carboxylic acid ethyl ester