Tetrahydrofuran → HCID 86683399, compound

To a stirred mixture of 6-methoxy-1,2,3,4-tetrahydro-isoquinoline-5-carbaldehyde hydrochloride (153 mg, 0.67 mmol) and triethylamine (447 μL, 324 mg, 3.2 mmol) in anhydrous tetrahydrofuran (8 mL) 3-(4-methyl-piperazin-1-yl)-propionic acid (172 mg, 1.0 mmol), (3-dimethylaminopropyl)-ethyl-carbodiimide hydrochloride (192 mg, 1.0 mmol) and 1-hydroxy-benzotriazole (135 mg, 1.0 mmol) were added in the above order and the mixture was stirred at room temperature for 3 h. After dilution with ethyl acetate (20 mL) the mixture was washed with 1 N aqueous NaOH (3×5 mL) and water (3×5 mL) and then the product was extracted into 1 N HCl (3×5 mL). The aqueous acidic layer was rendered alkaline (pH=10) with 10% aqueous NaOH and extracted with chloroform (3×10 mL). The combined chloroform layers were washed with water (3×5 mL), dried over MgSO4 and concentrated. In this manner the title compound (206 mg, 0.60 mmol, 89.6%) was obtained as a yellow oil.

1. additionwere added in the above order
2. washAfter dilution with ethyl acetate (20 mL) the mixture was washed with 1 N aqueous NaOH (3×5 mL) and water (3×5 mL)
3. extractionthe product was extracted into 1 N HCl (3×5 mL)
4. extractionextracted with chloroform (3×10 mL)
5. washThe combined chloroform layers were washed with water (3×5 mL)
6. dry with materialdried over MgSO4
7. concentrationconcentrated

ORD record

ord-ee18ce586abf42c493d9d2dbcf8547a8

Source dataset

uspto-grants-2015_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09040714B2