2-Ethoxy-1-naphthoic acid → 2-[(2-Ethoxy-naphthalene-1-carbonyl)-amino]-indan-2-carboxylic acid ethyl ester

Participants

Role	Name	HCID	Charge
Reactant	2-Ethoxy-1-naphthoic acid	HCID 75210	—
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	Ethyl 2-amino-2,3-dihydro-1H-indene-2-carboxylate	HCID 10921653	—
Solvent	Dimethylformamide	HCID 6228	—
Product	2-[(2-Ethoxy-naphthalene-1-carbonyl)-amino]-indan-2-carboxylic acid ethyl ester	HCID 59314345	67.2%

Reaction Steps

To a solution of 2-ethoxy-naphthalene-1-carboxylic acid (335 mg, 1.55 mmol), 2-amino-indan-2-carboxylic acid ethyl ester (318 mg, 1.55 mmol), HATU (886 mg, 2.33 mmol) in anhydrous DMF (8 mL) is added DIPEA (385 μL, 2.33 mmol). The resulting solution is stirred at RT overnight. After the removal of DMF in vacuo, the residue is dissolved in EtOAc (40 mL) and washed with water (1×10 mL) and brine (2×10 mL). The organic layer is dried over anhydrous Na2SO4 and concentrated in vacuo. The residue is purified by flash column chromatography (115 g silica gel, gradient elution: 5-50% EtOAc in heptane) to give a pure product (45) as white solid (420 mg, 67%).

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US08569535B2
Source dataset	uspto-grants-2013_10
ORD ID	ord-a81bf9229bd542ff910d79010f6664e5
Source note	uspto-grants-2013_10