Diisopropylethylamine → (S)-benzyl 4-(tert-butoxycarbonylamino)-5-((R)-1-(1-hydroxy-3,3-dimethyl-1,3-dihydrobenzo[c][1,2]oxaborol-6-ylamino)-1-oxo-4-(4-(trifluoromethyl)phenyl)butan-2-ylamino)-5-oxopentanoate

HRID 1425950Notes

Reaction equation

HRID 1425950 reaction equation
[NH2:1][C@H:2]([CH2:18][CH2:19][C:20]1[CH:25]=[CH:24][C:23]([C:26]([F:29])([F:28])[F:27])=[CH:22][CH:21]=1)[C:3]([NH:5][C:6]1[CH:7]=[CH:8][C:9]2[C:13]([CH3:15])([CH3:14])[O:12][B:11]([OH:16])[C:10]=2[CH:17]=1)=[O:4].[NH:30]([C:47]([O:49][C:50]([CH3:53])([CH3:52])[CH3:51])=[O:48])[C@H:31]([C:44](O)=[O:45])[CH2:32][CH2:33][C:34](=[O:43])[O:35][CH2:36][C:37]1[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=1.CCN(C(C)C)C(C)C.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>C(Cl)Cl>[C:50]([O:49][C:47]([NH:30][C@H:31]([C:44]([NH:1][C@H:2]([CH2:18][CH2:19][C:20]1[CH:21]=[CH:22][C:23]([C:26]([F:28])([F:29])[F:27])=[CH:24][CH:25]=1)[C:3]([NH:5][C:6]1[CH:7]=[CH:8][C:9]2[C:13]([CH3:15])([CH3:14])[O:12][B:11]([OH:16])[C:10]=2[CH:17]=1)=[O:4])=[O:45])[CH2:32][CH2:33][C:34]([O:35][CH2:36][C:37]1[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=1)=[O:43])=[O:48])([CH3:53])([CH3:52])[CH3:51]

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 83589L-Glutamic acid, N-((1,1-dimethylethoxy)carbonyl)-, 5-(phenylmethyl) esterHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 68281487HCID 68281487, compound

Product 1

HCID 86702808(S)-benzyl 4-(tert-butoxycarbonylamino)-5-((R)-1-(1-hydroxy-3,3-dimethyl-1,3-dihydrobenzo[c][1,2]oxaborol-6-ylamino)-1-oxo-4-(4-(trifluoromethyl)phenyl)butan-2-ylamino)-5-oxopentanoateYield 93%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a suspension of (R)-2-amino-N-(1-hydroxy-3,3-dimethyl-1,3-dihydrobenzo[c][1,2]oxaborol-6-yl)-4-(4-(trifluoromethyl)phenyl)butanamide (CLXIX) (1.2 g, 2.71 mmol) and Boc-Glu(OBzl)-OH (CLXX) (0.915 g, 2.71 mmol) in DCM (10 mL) was added DIPEA (1.39 mL, 8.13 mmol). To this solution was added HATU (1.03 g, 2.71 mmol) and the mixture was stirred at room temperature overnight. The mixture was washed with 2 N aqueous HCl, 1 M aqueous K2CO3, brine and dried over MgSO4. The solution was evaporated to dryness under vacuum to give (S)-benzyl 4-(tert-butoxycarbonylamino)-5-((R)-1-(1-hydroxy-3,3-dimethyl-1,3-dihydrobenzo[c][1,2]oxaborol-6-ylamino)-1-oxo-4-(4-(trifluoromethyl)phenyl)butan-2-ylamino)-5-oxopentanoate as an orange foam (1.83 g, 2.52 mmol, 93% yield). 1H NMR (DMSO-d6) δ ppm 1.33 (s, 9H), 1.4 (s, 6H), 1.8-1.88 (m, 1H), 1.9-1.96 (m, 2H), 2.08 (brs, 1H), 2.42 (brs, 2H), 2.6-2.66 (m, 1H), 2.7-2.76 (m, 1H), 3.98-4.05 (m, 1H), 4.4 (brs, 1H), 5.07 (s, 2H), 7.1 (brs, 1H), 7.28-7.34 (m, 6H), 7.37-7.44 (m, 2H), 7.55-7.63 (m, 3H), 7.89 (s, 1H), 8.34 (brs, 1H), 9.0 (s, 1H), 9.86 (s, 1H); 19F NMR (DMSO-d6) δ ppm −60.11 (s, 3F); ESIMS found for C37H43BF3N3O8 m/z 726.7 (M+H).

Workup

  1. washThe mixture was washed with 2 N aqueous HCl, 1 M aqueous K2CO3, brine
  2. dry with materialdried over MgSO4
  3. customThe solution was evaporated to dryness under vacuum

Sources & evidence

ORD record
ord-c66dbe05337d4ee985a9b44b45c042e1
Source dataset
uspto-grants-2015_01
Patent number
US08933018B2

Reaction notes

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