反应详情

Treatment of 15 (741 mg, 3 mmol) according to a procedure similar that used for making 11a afforded 16 (524 mg, 75% yield) as a colorless solid, mp 173°-174° C. Spectral data: 13C NMR (CD3 SOCD3): δ 11.7, 17.3, 23.9, 27.0, 40.6, 63.7, 115.4, 121.1, 122.8, 135.6, 149.2, 167.2; HRMS: calcd. for C14H19NO2 233.1415, fnd. 233.1416. Anal: calcd. for C14H19NO2C, 72.08, N, 6.00, H, 8.20, fnd. C, 71.88, N, 5.95, H, 8.22.