Anthranilic Acid → 7-(2-amino-benzoylamino)-4,4-dimethyl-3,4-dihydro-1H-isoquinoline-2-carboxylic acid tert-butyl ester

HRID 969684Notes

Reaction equation

[C:1]([O:5][C:6]([N:8]1[CH2:17][C:16]([CH3:19])([CH3:18])[C:15]2[C:10](=[CH:11][C:12]([NH2:20])=[CH:13][CH:14]=2)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[NH2:21][C:22]1[CH:30]=[CH:29][CH:28]=[CH:27][C:23]=1[C:24](O)=[O:25].CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.[B-](F)(F)(F)F.CCN(C(C)C)C(C)C>CN(C=O)C.CCOC(C)=O.O>[C:1]([O:5][C:6]([N:8]1[CH2:17][C:16]([CH3:19])([CH3:18])[C:15]2[C:10](=[CH:11][C:12]([NH:20][C:24](=[O:25])[C:23]3[CH:27]=[CH:28][CH:29]=[CH:30][C:22]=3[NH2:21])=[CH:13][CH:14]=2)[CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

Conditions

Temperature: 50 °C

Procedure

A mixture of 7-amino-4,4-dimethyl-3,4-dihydro-1H-isoquinoline-2-carboxylic acid tert-butyl ester (4.0 g, 14.60 mmol), 2-amino-benzoic acid (2.0 g, 14.60 mmol), TBTU (5.2 g, 16.06 mmol) and DIEA (2.7 mL, 16.06 mmol) in DMF (5 mL) was heated (50° C.) for 12 h in a sealed tube. The mixture was diluted with EtOAc and water. The aqueous layer extracted with EtOAc. The combined organic layers were dried over Na2SO4, filtered and concentrated in vacuo. The crude material was purified by flash chromatography (SiO2, 20% EtOAc/hexane) to afford a pinkish solid. MS (ES+): 396.0 (M+H)+. Calc'd for C23H29N3O3-395.49.

Workup

extractionThe aqueous layer extracted with EtOAc
dry with materialThe combined organic layers were dried over Na2SO4
filtrationfiltered
concentrationconcentrated in vacuo
customThe crude material was purified by flash chromatography (SiO2, 20% EtOAc/hexane)
customto afford a pinkish solid

Sources & evidence

ORD record: ord-f0d1372ae2ee4a8789358b29cb2b028b
Source dataset: uspto-grants-2007_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07307088B2

Reaction notes

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