Hydrochloric Acid → HCID 178471413, compound

HRID 84208Notes

Reaction equation

[CH2:1]([O:3][C:4](=[O:24])[C:5]([CH3:23])([CH3:22])[CH2:6][C@H:7]([NH2:21])[CH2:8][C:9]1[CH:14]=[CH:13][C:12]([C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=2)=[CH:11][CH:10]=1)[CH3:2].Cl.[OH:26][C:27]1[CH:31]=[C:30]([C:32](O)=[O:33])[O:29][N:28]=1.CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1>O1CCOCC1.CN(C=O)C.C(O)CCC>[CH2:1]([O:3][C:4](=[O:24])[C:5]([CH3:23])([CH3:22])[CH2:6][C@H:7]([NH:21][C:32]([C:30]1[O:29][N:28]=[C:27]([OH:26])[CH:31]=1)=[O:33])[CH2:8][C:9]1[CH:10]=[CH:11][C:12]([C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=2)=[CH:13][CH:14]=1)[CH3:2]

Participants

Conditions

Temperature: 65 °C

Procedure

(R)-4-Amino-5-biphenyl-4-yl-2,2-dimethyl-pentanoic acid ethyl ester (72.1 mg, 221 μmol, 1.0 eq.), 1-butanol (5 mL) and 4 M of HCl in 1,4-dioxane (2 mL) were combined and stirred at 65° C. overnight. To this was added a mixture of 3-hydroxyisoxazole-5-carboxylic acid (28.6 mg, 221 μmol, 1.0 eq.), EDCI (39.2 μL, 221 μmol, 1.0 eq.) and HOBt (29.9 mg, 221 μmol, 1.0 eq.) that had been combined in DMF (0.2 mL) and stirred for 5 minutes at room temperature. The resulting mixture was stirred for 30 minutes. The reaction was then quenched with AcOH and the product was purified by preparative HPLC to yield the title compound (50 mg, 95% purity). MS m/z [M+H]+ calc'd for C25H28N2O5, 437.20; Found 437.4.

Workup

additionTo this was added
stirringstirred for 5 minutes at room temperature
stirringThe resulting mixture was stirred for 30 minutes
customThe reaction was then quenched with AcOH
customthe product was purified by preparative HPLC

Sources & evidence

ORD record: ord-b60b723d31ee447abcb37892a4cb59cc
Source dataset: uspto-grants-2014_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08846913B2

Reaction notes

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