Triethylamine → tert-butyl (2S)-2-[(1R,2R)-3-{[2-(cyclohepta-2,4,6-trien-1-yl)ethyl]amino}-1-methoxy-2-methyl-3-oxopropyl]pyrrolidine-1-carboxylate

HRID 2282837Notes

Reaction equation

HRID 2282837 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][CH2:10][C@H:9]1[C@H:13]([O:19][CH3:20])[C@@H:14]([CH3:18])[C:15]([OH:17])=O)=[O:7])([CH3:4])([CH3:3])[CH3:2].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.C(N(CC)CC)C.[CH:52]1([CH2:59][CH2:60][NH2:61])[CH:58]=[CH:57][CH:56]=[CH:55][CH:54]=[CH:53]1>ClCCl.CN(C)C=O>[CH:52]1([CH2:59][CH2:60][NH:61][C:15](=[O:17])[C@H:14]([CH3:18])[C@H:13]([C@@H:9]2[CH2:10][CH2:11][CH2:12][N:8]2[C:6]([O:5][C:1]([CH3:2])([CH3:3])[CH3:4])=[O:7])[O:19][CH3:20])[CH:58]=[CH:57][CH:56]=[CH:55][CH:54]=[CH:53]1

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 11033491(2R,3R)-3-((2S)-1-(tert-Butoxycarbonyl)pyrrolidin-2-yl)-3-methoxy-2-methylpropanoic acidHCID 236233082-(Cyclohepta-2,4,6-trien-1-yl)ethanamine

Product 1

HCID 86685734tert-butyl (2S)-2-[(1R,2R)-3-{[2-(cyclohepta-2,4,6-trien-1-yl)ethyl]amino}-1-methoxy-2-methyl-3-oxopropyl]pyrrolidine-1-carboxylateYield 59%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of #11 (3.57 g, 12.4 mmol, 1 eq.) in dichloromethane (100 mL, 0.1 M) and N,N-dimethylformamide (4 mL) was added HATU (5.36 g, 13.7 mmol, 1.1 eq.). After 20 minutes, triethylamine (5.20 mL, 37.3 mmol, 3 eq.) was added, followed by #62 (1.68 g, 12.4 mmol, 1 eq.), and the mixture was stirred for 18 hours. The reaction was concentrated in vacuo and the residue was taken up in ethyl acetate and washed with water (50 mL). The aqueous layer was back-extracted with ethyl acetate (3 times) and the combined organic layers were dried, filtered, and concentrated in vacuo to provide a brown oil, which was purified by silica gel chromatography (Gradient: 0% to 100% ethyl acetate in heptane) to provide #63 (2.95 g, 59% yield) as a viscous oil. LC-MS: m/z 405.4 [M+H+], 427.4 [M+Na+], retention time=0.75 minutes; 1H NMR (400 MHz, CDCl3), presumed to be a mixture of rotamers: δ 6.63-6.68 (m, 2H), 6.16-6.23 (m, 2H), 5.19 (br dd, J=9.0, 5.8 Hz, 2H), 3.51-3.63 and 3.71-3.90 (2 br multiplets, total 3H), 3.42 (s, 3H), 3.18-3.29 and 3.34-3.47 (2 br multiplets, total 3H), 2.27-2.45 (br m, 1H), 1.6-2.00 (m, 7H), 1.47 and 1.50 (2 br s, total 9H), 1.16-1.29 (br m, 3H).

Workup

  1. concentrationThe reaction was concentrated in vacuo
  2. washwashed with water (50 mL)
  3. extractionThe aqueous layer was back-extracted with ethyl acetate (3 times)
  4. customthe combined organic layers were dried
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customto provide a brown oil, which
  8. customwas purified by silica gel chromatography (Gradient: 0% to 100% ethyl acetate in heptane)

Sources & evidence

ORD record
ord-5dc51c60989c49939c9a5b078b377599
Source dataset
uspto-grants-2015_09
Patent number
US09138486B2

Reaction notes

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