Triethylamine → HCID 66860065, compound

HRID 2179790Notes

Reaction equation

HRID 2179790 reaction equation
[C:1]([O:5][C:6]([NH:8][C@@H:9]1[CH2:12][C@H:11]([C:13]([OH:15])=O)[C:10]1([CH3:17])[CH3:16])=[O:7])([CH3:4])([CH3:3])[CH3:2].C1C=CC2N(O)N=NC=2C=1.Cl.[NH2:29][C@@H:30]([CH:35]([CH3:37])[CH3:36])[C:31]([O:33][CH3:34])=[O:32].CCN(CC)CC>C(Cl)Cl>[C:1]([O:5][C:6]([NH:8][C@@H:9]1[CH2:12][C@H:11]([C:13]([NH:29][C@@H:30]([CH:35]([CH3:37])[CH3:36])[C:31]([O:33][CH3:34])=[O:32])=[O:15])[C:10]1([CH3:17])[CH3:16])=[O:7])([CH3:2])([CH3:3])[CH3:4]

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 757711-HydroxybenzotriazoleHCID 111190Methyl valinate hydrochlorideHCID 15819069HCID 15819069, compound

Product 1

HCID 66860065HCID 66860065, compoundYield 85.9%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent3×

Procedure

To a stirred solution of (1S,3R)-3-(tert-butoxycarbonylamino)-2,2-dimethylcyclobutanecarboxylic acid (0.350 g, 1.44 mmol) in DCM (5 ml) EDCI (0.331 g, 1.73 mmol) and HOBt (0.234 g, 1.73 mmol) were added at about 0° C. After 10 minutes, (S)-methyl 2-amino-3-methylbutanoate hydrochloride (0.720, 8.64 mmol) and Et3N (1.2 ml, 6.17 mmol) in DCM (5 ml) were added drop wise and the reaction mass was allowed to stir at room temperature for about 16 hours. After completion of the reaction (monitored by TLC), the reaction mixture was diluted with DCM and washed with water and saturated NaHCO3 solution, then washed with aqueous 1N HCl, then washed with water and saturated brine, and the organic layer was concentrated under reduced pressure, the resulting crude was purified by silica gel column (100-200 mesh, elution 70% EtOAC in hexane) to afford the title compound as a solid. Wt: 0.440 g; Yield: 85.9%; 1H NMR (300 MHz, CDCl3): δ 5.62 (d, 1H, J=8.4 Hz), 4.77 (d, 111, J=8.4 Hz), 4.70-4.60 (m, 1H), 4.89-4.71 (m, 1H), 3.72 (s, 3H), 2.46-2.21 (m, 2H), 2.18-1.99 (m, 1H), 1.70-1.50 (m, 1H), 1.42 (s, 9H), 1.31 (s, 3H), 0.94-0.90 (s, 9H); Mass: The related mass peak was not observed; IR (KBr, cm−1): 3345, 3314, 2960, 1753, 1690, 1664, 1529, 1456, 1366, 1271, 1172, 1049, 1028, 986, 873.

Workup

  1. customAfter completion of the reaction (monitored by TLC)
  2. washwashed with water and saturated NaHCO3 solution
  3. washwashed with aqueous 1N HCl
  4. washwashed with water and saturated brine
  5. concentrationthe organic layer was concentrated under reduced pressure
  6. customthe resulting crude was purified by silica gel column (100-200 mesh, elution 70% EtOAC in hexane)

Sources & evidence

ORD record
ord-628d90b7a6444bd6ac33accc0a607698
Source dataset
uspto-grants-2015_06
Patent number
US09067966B2

Reaction notes

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