1-Methylcyclopropanecarboxylic acid → Methyl 2-(1-methylcyclopropanecarbonyl)-5-oxo-1,2,3,4,5,10-hexahydrobenzo[b][1,7]naphthyridine-6-carboxylate

Participants

Role	Name	HCID	Charge
Reactant	1-Methylcyclopropanecarboxylic acid	HCID 81326	—
Reactant	Diisopropylethylamine	HCID 81531	—
Reactant	Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)	HCID 9886157	—
Reactant	Methyl 5-oxo-1,2,3,4,5,10-hexahydrobenzo[b][1,7]naphthyridine-6-carboxylate hydrobromide	HCID 89657238	—
Solvent	Dimethylformamide	HCID 6228	—
Product	Methyl 2-(1-methylcyclopropanecarbonyl)-5-oxo-1,2,3,4,5,10-hexahydrobenzo[b][1,7]naphthyridine-6-carboxylate	HCID 89657592	25%

Reaction Steps

A solution of HATU (340 mg, 0.9 mmol) in DMF (2 ml) was added to a mixture of methyl 5-oxo-1,2,3,4,5,10-hexahydrobenzo[b][1,7]naphthyridine-6-carboxylate (200 mg, 0.77 mmol) from Example 13 (Step 2), 1-methylcyclopropanecarboxylic acid (102 mg, 1.02 mmol), diisopropylethylamine (0.5 mL, 5.09 mmol) and DMF (8 ml). The resultant mixture was stirred at ambient temperature for 8 hours. The DMF was evaporated and the residue was purified by pre-TLC to give methyl 2-(1-methylcyclopropanecarbonyl)-5-oxo-1,2,3,4,5,10-hexahydrobenzo[b][1,7]naphthyridine-6-carboxylate (65 mg, 25%) as yellow solid.

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US09328111B2
Source dataset	uspto-grants-2016_05
ORD ID	ord-9f890e39d41c4a4bb3e5b1589b744307
Source note	uspto-grants-2016_05