Benzyl Bromide → 3-(Benzyloxy)-2,2-difluoropropan-1-OL

A suspension of 2,2-difluoropropane-1,3-diol (Compound 59I, 6.0 g, 53.5 mmol), 4-fluorophenylboronic acid (1.5 g, 10.7 mmol) and K2CO3 (11.0 g, 80.3 mmol) in DMF (50 mL) was treated with benzyl bromide (8.9 mL, 74.9 mmol). The reaction mixture was stirred at RT for 72 h, diluted with ethyl acetate (200 mL) and washed with water (5×100 mL). The organic layer was dried over Na2SO4, filtered and concentrated to give yellow oil which was purified by column chromatography (SiO2, 20% ethyl acetate/hexanes) to give 5 g (50%) of the desired product as an oil. 1H NMR (500 MHz, CDCl3) δ 7.38-7.34 (m, 5H), 4.70 (s, 2H), 3.89-3.88 (m, 2H), 3.77 (t, J=12.6 Hz, 2H).

1. washwashed with water (5×100 mL)
2. dry with materialThe organic layer was dried over Na2SO4
3. filtrationfiltered
4. concentrationconcentrated
5. customto give yellow oil which
6. customwas purified by column chromatography (SiO2, 20% ethyl acetate/hexanes)

ORDレコード

ord-f744759d3a4745b4a3e913426fd41e1d

出典データセット

uspto-grants-2015_09

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US09133224B2