(N-phenyliminovinylidene)triphenylphosphorane 、
(1-acetyl-2-oxo-1,2-dihydro-indol-3-ylidene)-acetic acid methyl ester 以
四氢呋喃 为溶剂,
反应 4.0h,
以68%的产率得到9-Acetyl-2-[(Z)-phenylimino]-3-(triphenyl-λ
5-phosphanylidene)-2,3,4,9-tetrahydro-pyrano[2,3-b]indole-4-carboxylic acid methyl ester