2,4,6-Trimethylpyridine → (S)-tert-butyl 2-(4-chlorophenyl)-3-(isoquinolin-6-ylamino)-3-oxopropylcarbamate

HRID 1482737Notes

Reaction equation

[C:1]([O:5][C:6]([NH:8][CH2:9][C@H:10]([C:14]1[CH:19]=[CH:18][C:17]([Cl:20])=[CH:16][CH:15]=1)[C:11]([OH:13])=O)=[O:7])([CH3:4])([CH3:3])[CH3:2].CC1C=C(C)C=C(C)N=1.ClC(OC(C)(C)C(Cl)(Cl)Cl)=O.[NH2:41][C:42]1[CH:43]=[C:44]2[C:49](=[CH:50][CH:51]=1)[CH:48]=[N:47][CH:46]=[CH:45]2.C([O-])(O)=O.[Na+]>CN(C=O)C>[Cl:20][C:17]1[CH:18]=[CH:19][C:14]([C@H:10]([C:11]([NH:41][C:42]2[CH:43]=[C:44]3[C:49](=[CH:50][CH:51]=2)[CH:48]=[N:47][CH:46]=[CH:45]3)=[O:13])[CH2:9][NH:8][C:6](=[O:7])[O:5][C:1]([CH3:2])([CH3:3])[CH3:4])=[CH:15][CH:16]=1

Participants

Conditions

Temperature: 0 °C

Procedure

To (S)-3-(tert-butoxycarbonylamino)-2-(4-chlorophenyl)propanoic acid (28) (8.5 g, 28.4 mmol) in DMF cooled to 0° C. was added 2,4,6-trimethylpyridine and 2,2,2-trichloro-1,1-dimethylethyl chloroformate in DMF. Then, 6-aminoisoquinoline in DMF was added and the solution stirred for 2 h at 0° C. The mixture was poured into NaHCO3 (sat) and extracted with EtOAc. The organic layers were washed with H2O, dried (Na2SO4), filtered and evaporated to give crude 29. Column chromatography (30% EtOAc-Hexanes) and recrystallization (EtOAc/Hexanes) gave pure (S)-tert-butyl 2-(4-chlorophenyl)-3-(isoquinolin-6-ylamino)-3-oxopropylcarbamate (29, 7.8 g, 64%, >99% S enantiomer).

Workup

extractionextracted with EtOAc
washThe organic layers were washed with H2O
dry with materialdried (Na2SO4)
filtrationfiltered
customevaporated
customto give crude 29
customColumn chromatography (30% EtOAc-Hexanes) and recrystallization (EtOAc/Hexanes)

Sources & evidence

ORD record: ord-68c478e9f6394efbafce932177535957
Source dataset: uspto-grants-2016_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09415043B2

Reaction notes

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