Triethylamine → HCID 42599204, compound

(Method J8) To a solution of appropriate carboxylic acid 1/58, 1/59, 1/60, 1/61 (2.0 mmol) in anhydrous tetrahydrofuran (5 ml) under argon atmosphere triethylamine (0.36 ml, 2.6 mmol) was added and the mixture was cooled in an ice bath. Then to the reaction mixture iso-butylchloroformate (0.3 ml, 2.3 mmol) was added and the resulting mixture was stirred for 20 min at ice bath temperature. At the same time, a suspension of methyl 6-aminocaproate hydrochloride (2c) (364 mg, 2 mmol), anhydrous tetrahydrofuran (3 ml) and triethylamine (0.31 ml, 2.2 mmol) was prepared and stirred for 20 min at room temperature. This suspension to the above prepared reaction mixture of activated ester was added. The resulting mixture was stirred at ice bath temperature for 15 min and 1 hour at room temperature, then diluted with brine (50 ml) and extracted with ethyl acetate (3×25 ml). The organic phase was washed with brine, 5% NaHCO3, brine, saturated KH2PO4 and brine. The organic layer was dried (Na2SO4) and the solvent was evaporated. The residue was purified on silica gel (20 g) with chloroform-ethyl acetate as eluent affording title products 3/58, 3/59, 3/60, 3/61.

1. temperaturethe mixture was cooled in an ice bath
2. customwas prepared
3. stirringstirred for 20 min at room temperature
4. customThis suspension to the above prepared
5. additionwas added
6. stirringThe resulting mixture was stirred at ice bath temperature for 15 min
7. extractionextracted with ethyl acetate (3×25 ml)
8. washThe organic phase was washed with brine, 5% NaHCO3, brine, saturated KH2PO4 and brine
9. dry with materialThe organic layer was dried (Na2SO4)
10. customthe solvent was evaporated
11. customThe residue was purified on silica gel (20 g) with chloroform-ethyl acetate as eluent

ORD record

ord-2b49c9cd46b14026b81ebedee900bb04

Source dataset

uspto-grants-2011_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07880020B2