Triethylamine → HCID 66858268, compound

HRID 2179793Notes

Reaction equation

HRID 2179793 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]([CH2:35][CH:36]([CH3:38])[CH3:37])[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]([CH2:35][CH:36]([CH3:38])[CH3:37])[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 2723695Leucine methyl ester hydrochlorideHCID 15819069HCID 15819069, compound

Product 1

HCID 66858268HCID 66858268, compoundYield 39.4%

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 0° C. After 10 minutes, (S)-methyl 2-amino-4-methylpentanoate hydrochloride (0.780, 4.32 mmol) and Et3N (1.2 ml, 8.64 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, sat. NaHCO3 solution, water, 1N HCl, 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 65% EtOAC in hexane) to afford the title compound as a solid. Wt: 0.210 g; Yield: 39.4%; 1H NMR (300 MHz, CDCl3): δ 5.56 (d, 1H), 4.75 (d, 1H, J=9 Hz), 4.70-4.60 (m, 1H), 3.88-3.79 (m, 1H), 3.73 (s, 3H), 2.48-2.25 (m, 2H), 2.14-1.99 (m, 1H), 1.70-1.48 (m, 3H), 1.43 (s, 9H), 1.32 (s, 3H), 0.95-0.91 (m, 9H); Mass: [M+Na]+ 393 (100%); IR (KBr, cm−1): 3344, 2960, 2873, 1743, 1689, 1664, 1531, 1458, 1366, 1271, 1174, 1050, 1028, 873, 827, 744; M.R: 100.5° C.-103.9° C.

Workup

  1. customAfter completion of the reaction (monitored by TLC)
  2. washwashed with water, sat. NaHCO3 solution, water, 1N HCl, water and saturated brine
  3. concentrationthe organic layer was concentrated under reduced pressure
  4. customthe resulting crude was purified by silica gel column (100-200 mesh, elution 65% EtOAC in hexane)

Sources & evidence

ORD record
ord-31c271bd42bc4e928c51418142b4629a
Source dataset
uspto-grants-2015_06
Patent number
US09067966B2

Reaction notes

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