重氮甲烷 、
(Z)-2-Hydroxy-3-(3-oxo-1-oxy-3,4-dihydro-quinoxalin-2-yl)-acrylic acid ethyl ester 生成 (Z)-2-Hydroxy-3-(4-methyl-3-oxo-1,2,3,4-tetrahydro-quinoxalin-2-yl)-acrylic acid ethyl ester 、 (Z)-2-Hydroxy-3-(3-methoxy-1,2-dihydro-quinoxalin-2-yl)-acrylic acid ethyl ester