5-(Methoxyoxalyl-amino)-2-(3-methoxy-phenyl)-2-methyl-6H-[1,3]dithiine-4-carboxylic acid methyl ester 在
sodium amide 作用下,
以
四氢呋喃 为溶剂,
生成
2-(4-methoxy-phenyl)-2-methyl-6,7-dioxo-5,6,7,7a-tetrahydro-[1,3]dithiino[5,4-b]pyrrole-4-carboxylic acid methyl ester