4-Methylmorpholine → N-(1-Amino-isoquinolin-6-ylmethyl)-1-tert.butoxycarbonyl-prolinamide

Participants

Role	Name	HCID	Charge
Reactant	4-Methylmorpholine	HCID 7972	—
Reactant	1,2-Pyrrolidinedicarboxylic acid, 1-(1,1-dimethylethyl) ester, (2S)-	HCID 85083	—
Reactant	O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate	HCID 2733207	—
Reactant	6-(Aminomethyl)isoquinolin-1-amine	HCID 22169775	—
Solvent	Dimethylformamide	HCID 6228	—
Product	N-(1-Amino-isoquinolin-6-ylmethyl)-1-tert.butoxycarbonyl-prolinamide	HCID 22958562	100.3%

Reaction Steps

5.00 g of 1-Amino-6-aminomethyl-isoquinoline and 6.20 g Boc-L-proline were dissolved in 88 mL DMF. 10.6 g of TBTU was added followed by a dropwise addition of N-methylmorpholine. Stirring was continued for 1 h at ambient temperature and the solvent was removed i.vac. The residue was extracted with 5% aqueous NaHCO3 solution and with ethyl acetate. The organic layer was separated and dried (NaSO4). The solvent was removed to give 10.7 g (quant.) of N-(1-Amino-isoquinolin-6-ylmethyl)-1-tert.butoxycarbonyl-prolinamide as an oil. Without purification, the compound was dissolved in 50 mL dichloromethane and 25.0 mL trifluoroacetic acid was added. Stirring was continued for 16 h and the solvent was removed i.vac. The residue was dissolved in methanol, the solvent was removed i. vac. And the residue was triturated with diethyl ether. The crystalline material was collected to give 12.9 g (89%) of N-(1-amino-isoquinolin-6-ylmethyl)-prolinamide. M.p. 140-142° C.

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US06797710B2
Source dataset	uspto-grants-2004_09
ORD ID	ord-aca5d2878f3448c69d254ad3fd6941cd
Source note	uspto-grants-2004_09