3,5-Dimethoxybenzaldehyde → [3-(Tert-butyl-dimethyl-silanyloxy)-4-methoxy-phenyl]-(3,5-dimethoxyphenyl)-methanol

Participants

Reaction Steps

(5-Bromo-2-methoxyphenoxy)-tert-butyldimethylsilane (0.98 g, 3.09 mmol), n-butyl lithium (1.24 ml, 3.09 mmol), and 3,5-dimethoxybenzaldehyde (0.47 g, 2.81 mmol) were treated in the same manner as described above for the synthesis of (2,3-dihydrobenzo[1,4]dioxin-6-yl)-(3,5-dimethoxyphenyl)methanol. The crude material was purified via flash column chromatography (5% EtOAc in hexane gradient to 30% EtOAc in hexane in about 40 min.) to give [3-(tert-butyl-dimethyl-silanyloxy)-4-methoxy-phenyl]-(3,5-dimethoxyphenyl)-methanol as an oil (0.79 g, 69%), HPLC purity was 98.3% at 2.55 min. (90/10 ACN/0.1% H3PO4): 1HNMR (CDCl3) δ 6.92-6.78 (m, 3H, Ar), 6.53 (d, J=2 Hz, 2H, Ar), 6.35 (t, J=2 Hz, 1H, Ar), 5.66 (d, J=3 Hz, 1H, CH), 3.78 (s, 3H, single OCH3), 3.76 (s, 6H, 2OCH3), 2.15 (d, J=3 Hz, 1H, OH), 0.97 (s, 9H, 3OCH3), 0.13 (s, 6H, 2OCH3). The product was carried over to the next step.

Provenance & Evidence