反应详情

Compound 31 was prepared as described for 29. The reagents used were as follows, compound 25 (38.0 g, 0.109 mol.), tetrafluoroboric acid-diethyl ether complex (22 ml of a 54% solution in diethyl ether) dichloromethane (100 ml) and excess potassium carbonate. The final yield was a colorless liquid (17.3 g, 59%), (bpt. 95°-120° C., 0.04 torr): 1H-NMR (CDCl3), d, (ppm). Mass spectroscopy, m/e 293 MH+.

1. customThe final yield