HCID 59431063, compound → HCID 131732771, compound

Participants

Reaction Conditions

Reaction Steps

A solution of (4-(5-bromo-2-chlorobenzyl)phenoxy)(tert-butyl)dimethylsilane (14.2 g, 34.57 mmol, prepared following the procedure given in US20070049537) in dry THF (90 mL) was cooled to −78° C. and nBuLi (30.7 mL, 46.05 mmol, 1.5 M solution in hexane) was added drop wise while stirring and stirring was continued for further 30 min. A solution of (3aS,5R,6R,6aS)-6-((tert-butyldimethylsilyl)oxy)-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxole-5-carbaldehyde (7.0 g, 23.05 mmol, prepared according to the procedure given in NUCLEOSIDE, NUCLOETIDES & NUCLEIC ACIDS, 20(4-7), 649-652 (2001)) in dry THF (13 mL) was added dropwise to the reaction mixture and stirred at the same temperature for 2 h. Reaction temperature was raised slowly to 0° C. and then stirred at r.t. for 16 h. After completion of reaction, as confirmed by TLC, reaction mixture was quenched by the addition of saturated NH4Cl solution and extracted with ethyl acetate (3×300 mL). The combined organic layers were dried over Na2SO4 and the volatiles were evaporated in vacuo. The residue obtained was purified by column chromatography (silica gel, 0.2:9.8 Acetone:Pet. Ether) to afford the title compound (3.66 g, 25%)

Provenance & Evidence