2-(乙基磺酰基)吡啶 、 (9aS)-3-methoxy-1-phenyl-9,9a-dihydro-1H-2-oxa-6a,10a-diazabenzo[cd]cyclopenta[g]azulene-6,8,10(7H)-trione 在
lithium hexamethyldisilazane 作用下,
以
四氢呋喃 为溶剂,
生成 (9aS)-8-ethylidene-3-methoxy-1-phenyl-7,8,9,9a-tetrahydro-1H-2-oxa-6a,10a-diazabenzo[cd]cyclopenta[g]azulene-6,10-dione