Acetic acid, 2-(triphenylphosphoranylidene)-, methyl ester → 5'-(2-Methoxycarbonylvinyl)-1,3,3-trimethylspiro-[indoline-2,3'-[3H]-naphtho[2,1-b][1,4]oxazine]

Participants

Reaction Steps

0.34 g (1 mmol) of carbomethoxymethylene triphenylphosphorane and 0.36 g (1 mmol) of the compound of Example 1 are heated to reflux in 20 ml of dichloromethane for 18 hours. The solvent is evaporated off. The product is purified on a silica column (80/20 pentane/ethyl acetate eluent).

Provenance & Evidence