Hydrochloric Acid → [3-(methoxymethyl)phenyl](1-methyl-1H-tetrazol-5-yl)methanone

Temperature

0 °C

To a stirred solution of 1-methyl-1H-tetrazole (9.35 g, 111 mmol) in anhydrous THF (360 mL), cooled to 0° C. with a brine/ice bath, was added dropwise a solution of isopropylmagnesium chloride (2 M in THF, 55.6 mL, 111 mmol). After the addition was over, the resulting cloudy suspension was stirred for 15 min at 0° C. A solution of N-methoxy-3-(methoxymethyl)-N-methylbenzamide (19.4 g, 92.6 mmol) in THF (60 mL) was then added dropwise while keeping the internal temperature below 5° C. The reaction mixture was then allowed to warm up and stirred at room temperature for 24 h. The reaction mixture was poured into a mixture of ice-cold water (150 mL) and aq. HCl (1 M, 150 mL), the layers were separated, the water phase was extracted with ethyl acetate (2×150 mL) and the combined organic layers were dried (MgSO4). Purification on silica gel afforded [3-(methoxymethyl)phenyl](1-methyl-1H-tetrazol-5-yl)methanone as an oil [7.17 g, yield 33%; HPLC/MS m/z=233 (M+H); log P(HCOOH)=2.01].

1. additionAfter the addition
2. customthe internal temperature below 5° C
3. temperatureto warm up
4. stirringstirred at room temperature for 24 h
5. customthe layers were separated
6. extractionthe water phase was extracted with ethyl acetate (2×150 mL)
7. dry with materialthe combined organic layers were dried (MgSO4)
8. customPurification on silica gel

ORD record

ord-007abb3b13494a35a960b27423974a53

Source dataset

uspto-grants-2013_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08492388B2