Reacción #1058148

Ecuación de reacción

(2,3-dihydrobenzo[1,4]dioxin-6-yl)-(3,5-dimethoxyphenyl)methanol

3,4-dimethoxybenzaldehyde

6-Bromo-2,3-dihydrobenzo[1,4]dioxine

n-butyl lithium

→

(2,3-dihydro-benzo[1,4]dioxin-6-yl)-(3,4-dimethoxy-phenyl)-methanol

Rendimiento 89.4%

Condiciones de reacción

Tratamiento posterior

1. 1
   OtroThe crude material was purified via flash column chromatography (10% EtOAc in hexane gradient to 40% EtOAc in hexane in about 40 min.)

Procedimiento

3,4-dimethoxybenzaldehyde (2.21 g, 13.32 mmol), 6-Bromo-2,3-dihydrobenzo[1,4]dioxine (3.15 g, 14.65 mmol), and n-butyl lithium (5.86 ml, 14.65 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 (10% EtOAc in hexane gradient to 40% EtOAc in hexane in about 40 min.) to give (2,3-dihydro-benzo[1,4]dioxin-6-yl)-(3,4-dimethoxy-phenyl)-methanol as an oil (3.60 g, 89%): 1HNMR (CDCl3) 6.93-6.80 (m, 6H, Ar), 5.70 (d, J=3 Hz, 1H, CHOH), 4.24 (s, 4H, CH2CH2), 3.86 (s, 6H, 2OCH3), 2.14 (d, J=3 Hz, 1H, OH). The product was carried over to the next step.

Fuente