... The reaction was quenched with water, and the mixture was diluted with ether (50 mL). The organic layer was washed with aqueous 0.1N HCl, aqueous saturated NaHCO3, and brine and dried over MgSO4. ... 1976, 98, 4887. Scheme 2 2634 J. Org. Chem., Vol. 62, No. 8, 1997 ...