O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate → HCID 58386531, compound

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Reaction Steps

0.11 mg (0.29 mmol) of an isomer mixture of 5′-cyano-4-(2-oxo-2,3-dihydro-imidazo[4,5-b]pyridin-1-yl)-3,4,5,6-tetrahydro-2H-[1,2′]bipyridinyl-4′-carboxylic acid and 5′-cyano-4-(2-oxo-2,3-dihydro-imidazo[4,5-b]pyridin-1-yl)-3,4,5,6-tetrahydro-2H-[1,4′]bipyridinyl-2′-carboxylic acid, 65 mg (0.29 mmol) 7,7-dimethyl-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridine dihydrochloride and 0.17 mL (1.2 mmol) TEA were placed in 1.5 mL DMF. 0.10 g (0.32 mmol) TBTU were added. The reaction mixture was stirred over the weekend at RT. The purification and separation of the isomers were carried out by HPLC-MS. The product-containing fractions were combined and freeze-dried.

Provenance & Evidence