Triethylamine → HCID 73294500, compound

HRID 530526Notes

Reaction equation

[CH2:1]([O:7][C:8]([NH:10][C@H:11]([C@@H:15]([OH:17])[CH3:16])[C:12]([OH:14])=O)=[O:9])[CH2:2][CH2:3][CH2:4][CH2:5][CH3:6].CCN(CC)CC.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.[B-](F)(F)(F)F>C(Cl)Cl>[CH2:1]([O:7][C:8](=[O:9])[NH:10][C@H:11]1[C:12](=[O:14])[O:17][C@H:15]1[CH3:16])[CH2:2][CH2:3][CH2:4][CH2:5][CH3:6]

Participants

Conditions

Temperature: 0 °C

Procedure

Under nitrogen atmosphere at 0° C., to a stirred mixture of employing (2R,3S)-2-(hexoxycarbonylamino)-3-hydroxy-butanoic acid (0.27 g, 1.10 mmol) in dry CH2Cl2 (27 mL), Et3N (0.46 mL, 3.31 mmol) and subsequently TBTU (0.42 g, 1.32 mmol) were added. The mixture was left stirring 1 h at 0° C. and 15 h at rt. Upon full conversion of the starting material, the organics were removed under reduced pressure, and the resulting crude product absorbed over silica gel and purified by typical column chromatography, eluting with Cy:EtOAc (from 100:0 to 0:100) to afford the title compound (0.18 g, 73%), as white solid. [α]25D −25.1 (c 0.1, CHCl3). MS (ESI) m/z: 230 [M−H]+; (ESI) m/z: 228 [M−H]−. 1H NMR (DMSO-d6) δ 0.86 (t, J=6.9 Hz, 3H), 1.38-1.21 (m, 6H), 1.34 (d, J=6.4 Hz, 3H), 1.62-1.50 (m, 2H), 4.07-3.93 (m, 2H), 4.84 (dq, J=6.1, 6.4 Hz, 1H), 5.40 (dd, J=6.1, 9.3 Hz, 1H), 8.19 (d, J=9.3 Hz, 1H).

Workup

additionwere added
waitThe mixture was left
customUpon full conversion of the starting material, the organics were removed under reduced pressure
customthe resulting crude product absorbed over silica gel
custompurified by typical column chromatography
washeluting with Cy

Sources & evidence

ORD record: ord-7bfce2c8e6354c77b47a35a03e2eb388
Source dataset: uspto-grants-2016_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09353075B2

Reaction notes

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