Methanol → 1-{[(5S,7S)-2-oxo-3-({1-[5-(trifluoromethyl)-3-pyridinyl]-1H-1,2,3-triazol-4-yl}methyl)-1-oxa-3-azaspiro[4.5]dec-7-yl]methyl}-1H-benzimidazole-6-carbonitrile

Participants

Reaction Steps

To a light orange solution of 1-{[(5S,7S)-2-oxo-3-(2-propyn-1-yl)-1-oxa-3-azaspiro[4.5]dec-7-yl]methyl}-1H-benzimidazole-6-carbonitrile (0.100 g, 0.287 mmol) (93:7 trans:cis) in tert-butanol (1.435 mL) and water (1.435 mL) in a vial was added 3-azido-5-(trifluoromethyl)pyridine (0.054 g, 0.287 mmol), sodium L-ascorbate (0.011 g, 0.057 mmol), copper(II) sulfate pentahydrate (0.014 g, 0.057 mmol), and water (1.435 mL). After 18 h, 1 mL of MeOH was added and the mixture was vacuum filtered using a small Buchner funnel. The filtrate was filtered through Acrodisc CR 25 mm syringe filter with 0.2 um PTFE membrane and purified by Gilson prep HPLC: 25-45% CH3CN/H2O, 0.1% TFA, 30×150 mm Sunfire C18, 25 mL/min, 15 min to yield the TFA salt of 1-{[(5S,7S)-2-oxo-3-({1-[5-(trifluoromethyl)-3-pyridinyl]-1H-1,2,3-triazol-4-yl}methyl)-1-oxa-3-azaspiro[4.5]dec-7-yl]methyl}-1H-benzimidazole-6-carbonitrile as an orange foam (18.1 mg, 9.2% yield). MS (m/z) 537 (M+H+).

Provenance & Evidence