Azetidine → 5-(Azetidin-1-ylmethyl)-1-methyl-3-nitro-1H-pyrazole

Participants

Reaction Steps

Following Example 156e, 5-(bromomethyl)-1-methyl-3-nitro-1H-pyrazole 156d (1.76 g, 8 mmol), azetidine (550 mg, 9.6 mmol), di-isopropylethylamine (1.75 mL, 10 mmol) and methylene chloride (40 mL) were stirred at room temperature for 3-5 h. Work-up and concentrated under reduced pressure to afford 5-(azetidin-1-ylmethyl)-1-methyl-3-nitro-1H-pyrazole 200a (quant.) as yellow oil, which was used without further purification for the next step. MS (ESI+) m/z 197.1 (M+H).

Provenance & Evidence