Triethylamine → 5-phenylpentyl-N-[(2S,3R)-2-tert-butyl-4-oxo-oxetan-3-yl]-carbamate

HRID 530578Notes

Reaction equation

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

Participants

Conditions

Temperature: 0 °C

Procedure

Under nitrogen atmosphere, to a stirred mixture of (2R*,3S*)-3-hydroxy-4,4-dimethyl-2-(5-phenyl-pentoxy-carbonylamino)-pentanoic acid (0.346 g, 0.98 mmol) in dry CH2Cl2 (45 mL), at 0° C., Et3N (0.41 mL, 2.95 mmol) and subsequently TBTU (0.38 g, 1.20 mmol) were added. The mixture was left stirring at 0° C. for 1 h and at rt for 15 h. The organics were then removed under reduced pressure, and the resulting crude product purified by column chromatography, using a Teledyne ISCO apparatus, eluting with Cy:AcOEt (from 90:10 to 70:30) to afford the pure title compound (0.125 g, 38%), as white solid. MS (ESI) m/z: 351 [M−NH4]+; (ESI) m/z: 332 [M−H]−. 1H NMR (DMSO-d6) δ 0.93 (s, 9H), 1.34 (h, J=6.37, 7.16 Hz, 2H), 1.53-1.65 (m, 4H), 2.57 (t, J=7.69 Hz, 2H), 4.02 (q, J=6.25 Hz, 2H), 4.36 (d, J=6.24 Hz, 1H), 5.56 (dd, J=6.32, 8.47 Hz, 1H), 7.07-7.34 (m, 5H), 8.38 (d, J=8.48 Hz, 1H).

Workup

waitThe mixture was left
customThe organics were then removed under reduced pressure
customthe resulting crude product purified by column chromatography
washeluting with Cy

Sources & evidence

ORD record: ord-16e73e96b3274093a93b30316fda39c7
Source dataset: uspto-grants-2016_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09353075B2

Reaction notes

Loading…