反应 #3675392
相关文献 (1)
openreactiondata ↗doi:10.6084/m9.figshare.5104873.v1; patent:US08889692B2
反应条件: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.
实验步骤: Titanium(IV) isopropoxide (1.62 mL) was added to a stirred solution of 2-(benzyloxy)benzonitrile (1.05 g) in diethyl ether (25 mL) cooled to −78° C. under N2 followed by the dropwise addition of ethylmagnesium bromide (3.67 mL of a 3M solution in diethylether). The resulting mixture was stirred at −78° C. for 10 min and then warmed to rt over 1 h. Boron trifluoride diethyl etherate (1.27 mL) was added dropwise and the mixture was stirred for 1 h. The reaction was quenched with 1M HCl (30 mL). Diethyl ether (30 mL) was added and the organic layer separated. To the aqueous layer was added aqueous 10% NaOH (50 mL) and diethyl ether and this was filtered through celite to remove solids (which were washed with further diethyl ether). This mixture was extracted with diethyl ether (2×70 mL) and dichloromethane (70 mL). All the organic layers were combined, dried (Na2SO4) and the solvents removed in vacuo. The residue was dissolved in dichloromethane and loaded on to an 10 g SCX cartridge. The impurities were washed through with methanol (50 mL) and discarded. Elution with 7N methanolic ammonia (25 mL) and evaporation in vacuo gave the subtitle compound as a brown oil (0.625 g). warmed to rt over 1 h the mixture was stirred for 1 h The reaction was quenched with 1M HCl (30 mL) Diethyl ether (30 mL) was added the organic layer separated To the aqueous layer was added aqueous 10% NaOH (50 mL) and diethyl ether this was filtered through celite to remove solids (which were washed with further diethyl ether) This mixture was extracted with diethyl ether (2×70 mL) and dichloromethane (70 mL) dried (Na2SO4) the solvents removed in vacuo The residue was dissolved in dichloromethane The impurities were washed through with methanol (50 mL) Elution with 7N methanolic ammonia (25 mL) and evaporation in vacuo
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