Methanol → HCID 68380034, compound

A solution of 7-methoxy-2-(trifluoromethyl)-1,3-benzothiazole (C26) (398 mg, 1.71 mmol) in dichloromethane (10 mL) at −78° C. was treated with boron tribromide (1 M in dichloromethane, 3.41 mL, 3.41 mmol), warmed to room temperature and stirred for 18 hours. Methanol (3.0 mL) was added to the mixture at −78° C. and the mixture was warmed to room temperature. Water (30 mL) was added and the mixture was extracted with dichloromethane (2×10 mL). The combined organic layers were dried over sodium sulfate and concentrated in vacuo. Purification via silica gel chromatography (Gradient: 0% to 20% methyl tert-butyl ether in heptanes) afforded the title compound as a colorless solid. Yield: 251 mg, 1.15 mmol, 67%. GCMS m/z 219 (M+). 1H NMR (400 MHz, CDCl3) δ 6.44 (br s, 1H), 6.95 (d, J=7.8 Hz, 1H), 7.47 (dd, J=8.2, 8.0 Hz, 1H), 7.82 (d, J=8.2 Hz, 1H).

1. temperaturethe mixture was warmed to room temperature
2. extractionthe mixture was extracted with dichloromethane (2×10 mL)
3. dry with materialThe combined organic layers were dried over sodium sulfate
4. concentrationconcentrated in vacuo
5. customPurification via silica gel chromatography (Gradient: 0% to 20% methyl tert-butyl ether in heptanes)

ORD record

ord-b99f2cfaa1e24ba5a0899ab1e7c4521b

Source dataset

uspto-grants-2015_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09067934B2