反应详情

Triethyloxonium tetrafluoroborate (2.35 g) is added to a solution of (3aRS,7aRS)-7,7-diphenyl-2-[(2-methoxyphenyl)acetyl]perhydro-4-isoindolone (5 g) in dichloromethane (10 cc). The reaction mixture is left stirring for 20 hours at room temperature; it is then treated with ether (100 cc) and the precipitate obtained is drained, washed with ether (100 cc) and dried. (3aRS,7aRS)-2-[1-Ethoxy-2-(2-methoxyphenyl)ethylidene]-4-oxo-7,7-diphenylperhydroisoindolium tetrafluoroborate (5.75 g) is obtained in the form of a yellow powder, which is used in the crude state for the following manipulation.

1. waitThe reaction mixture is left
2. customthe precipitate obtained
3. washwashed with ether (100 cc)
4. customdried