4-Hydroxybenzaldehyde → HCID 23078883, compound

A mixture of 4-hydroxybenzaldehyde (1 g), benzyl 3-bromopropyl ether (1.88 g), cesium carbonate (3.2 g) and a catalytic amount of sodium iodide in N,N-dimethylformamide (15 mL) was stirred at room temperature overnight. The reaction mixture was poured into water, and the resulting mixture was extracted with diethyl ether. The extract was washed with water and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure to give 4-(3-benzyloxypropoxy)-benzaldehyde (2.21 g). To a suspension of methyltriphenyl-phosphonium bromide (2.92 g) in tetrahydrofuran (30 mL) was added n-butyl lithium (2.71 mol/L n-hexane solution, 3.02 mL) under ice-cooling, and the mixture was stirred for 5 minutes. To the reaction mixture was added a solution of 4-(3-benzyloxy-propoxy)benzaldehyde (2.21 g) in tetrahydrofuran (10 mL), and the mixture was stirred at room temperature for 30 minutes. To the reaction mixture was added a saturated aqueous ammonium chloride solution, and the resulting mixture was extracted with diethyl ether. The extract was washed with water and brine, and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure, and the residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=5/1) to give the title compound (1.4 g).

1. extractionthe resulting mixture was extracted with diethyl ether
2. washThe extract was washed with water
3. dry with materialdried over anhydrous magnesium sulfate
4. customThe solvent was removed under reduced pressure

ORD record

ord-e868d8b1679242e2bd562bb0bf34a0f2

Source dataset

uspto-grants-2011_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07998975B2