反应详情

Following the general procedure of Intermediate 36 but using 4-(2-bromo-4-nitrophenyl)morpholine as starting material and allowing 5 h for hydrogenation and subsequently purifying by chromatography eluting with EtOAc/isohexane there was thus obtained the title compound (Intermediate 75) in 24% yield; 1H NMR δ 6.90 (1H, d), 6.80 (1H, s), 6.50 (1H, dd), 5.00 (2H, s), 5.40 (1H, d), 3.70-3.60 (4H, m), 2.80-2.70 (4H, m); MS m/e MH+ 258.

1. customsubsequently purifying by chromatography
2. washeluting with EtOAc/isohexane there