5-(S)-1,4-Dioxa-spiro[4.5]dec-2-yl-2-methylsulfanyl-4-(2,2,2-trifluoro-acetyl)-5,6-dihydro-4H-[1,3,4]thiadiazine-6-carboxylic acid ethyl ester 在
sodium hydride 作用下,
以
四氢呋喃 为溶剂,
反应 0.5h,
以79%的产率得到(E)-3-(S)-1,4-Dioxa-spiro[4.5]dec-2-yl-2-{methylsulfanyl-[(2,2,2-trifluoro-acetyl)-hydrazono]-methylsulfanyl}-acrylic acid ethyl ester