(2S)-methyl 2-(4-chlorophenyl)-2-(2-oxo-7,7a-dihydrothieno[3.2-c]pyridin-5 (2H,4H,6H)-yl)-acetate 、
乙酸酐 、 (4-chlorophenylacetate) 在
(S)-methyl 2-(2-acetoxy-6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl) 作用下,
生成
(S)-methyl 2-(2-acetoxy-6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl)-2-(4-chlorophenyl)acetate