Diisopropylethylamine → (s)-Pyrrolidine-2-carboxylic acid 4-{[(1h-benzimidazol-2-ylmethyl)-(5,6,7,8-tetrahydro-quinolin-8-yl)-amino]-methyl}-benzylamide

Participants

Role	Name	HCID	Charge
Reactant	Diisopropylethylamine	HCID 81531	—
Reactant	1,2-Pyrrolidinedicarboxylic acid, 1-(1,1-dimethylethyl) ester, (2S)-	HCID 85083	—
Reactant	1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride	HCID 2723939	—
Reactant	1-Hydroxybenzotriazole hydrate	HCID 2796029	—
Reactant	N-[(1H-Benzo[d]imidazol-2-yl)methyl]-N-(4-(aminomethyl)-benzyl)-5,6,7,8-tetrahydroquinolin-8-amine	HCID 21985008	—
Solvent	Dichloromethane	HCID 6344	—
Solvent	Sodium Bicarbonate	HCID 516892	—
Product	(s)-Pyrrolidine-2-carboxylic acid 4-{[(1h-benzimidazol-2-ylmethyl)-(5,6,7,8-tetrahydro-quinolin-8-yl)-amino]-methyl}-benzylamide	HCID 59989987	116.9%

Reaction Steps

To a stirred solution of N′-(1H-benzimidazol-2-ylmethyl)-N′-(5,6,7,8-tetrahydro-8-quinolinyl)-1,4-benzenedimethanamine (148 mg, 0.37 mmol) in dry CH2Cl2 (5 mL) was added N-(tert-butoxycarbonyl)-L-proline (88 mg, 0.41 mmol), N,N-diisopropylethylamine (0.13 mL, 0.75 mmol), 1-hydroxybenzotriazole hydrate (68 mg, 0.50 mmol) and 1-(3-dimethylaminopropyl)-3-ethyl carbodiimide HCl (EDC) (99 mg, 0.52 mmol) and the mixture stirred at room temperature overnight. The reaction mixture was diluted with CH2Cl2 (25 mL) and saturated aqueous sodium bicarbonate (30 mL) and the aqueous layer was separated and extracted with CH2Cl2 (2×15 mL). The combined organic phases were dried (Na2SO4), filtered and evaporated in vacuo to give the crude product as a white foam. Purification by column chromatography on silica gel (CH2Cl2/MeOH, 96:4) gave the desired amide (214 mg, 85%) as a white foam.

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US07084155B2
Source dataset	uspto-grants-2006_08
ORD ID	ord-31bd20a9662e4534960e36dc214e3c85
Source note	uspto-grants-2006_08