Triethylamine → tert-butyl(3aR,4S,6aS)-2-(5-(trifluoromethyl)pyridin-2-yl)octahydrocyclopenta[c]pyrrol-4-ylcarbamate

HRID 2363576Notes

Reaction equation

[CH2:1]1[C@H:5]2[CH2:6][CH2:7][C@H:8]([NH:9][C:10](=[O:16])[O:11][C:12]([CH3:15])([CH3:14])[CH3:13])[C@H:4]2[CH2:3][NH:2]1.Br[C:18]1[CH:23]=[CH:22][C:21]([C:24]([F:27])([F:26])[F:25])=[CH:20][N:19]=1.C(N(CC)CC)C.O.C(O)C>C(O)C>[F:25][C:24]([F:27])([F:26])[C:21]1[CH:22]=[CH:23][C:18]([N:2]2[CH2:3][C@@H:4]3[C@@H:8]([NH:9][C:10](=[O:16])[O:11][C:12]([CH3:13])([CH3:15])[CH3:14])[CH2:7][CH2:6][C@@H:5]3[CH2:1]2)=[N:19][CH:20]=1

Participants

Conditions

Temperature: 81 °C

Procedure

tert-Butyl(3aR,4S,6aS)-octahydrocyclopenta[c]pyrrol-4-ylcarbamate from Step B of Example 252 (250 mg, 1.105 mmol), 2-bromo-5-(trifluoromethyl)pyridine (250 mg, 1.105 mmol), and triethylamine (0.462 mL, 3.31 mmol) were combined in ethanol (0.6 mL). The reaction was heated at 81° C. for 16 hours. To the reaction mixture was added 50% water/ethanol (5 mL), and the precipitate was collected by filtration. This crude material was purified using a 12 g silica gel cartridge with a gradient of 0-1.5% methanol (2 N ammonia)/dichloromethane over 20 minutes to give tert-butyl(3aR,4S,6aS)-2-(5-(trifluoromethyl)pyridin-2-yl)octahydrocyclopenta[c]pyrrol-4-ylcarbamate: 1H NMR (500 MHz, pyridine-d5) δ ppm 8.62 (s, 1H), 7.76 (d, J=6.4, 1H), 7.68 (d, J=8.6, 1H), 6.38 (d, J=8.8, 1H), 4.10 (s, 1H), 3.73 (d, J=10.4, 1H), 3.65 (s, 1H), 3.61-3.53 (m, 1H), 3.32 (d, J=10.1, 1H), 2.82-2.71 (m, 2H), 2.15 (td, J=12.6, 6.8, 1H), 1.97 (dt, J=13.1, 6.4, 1H), 1.74 (dq, J=15.6, 7.9, 1H), 1.54 (s, 9H), 1.45-1.34 (m, 1H); MS (DCI+) m/z 372 (M+H)+.

Workup

filtrationthe precipitate was collected by filtration
customThis crude material was purified
customover 20 minutes

Sources & evidence

ORD record: ord-5e7565f1536d44a18630d95cfedc17b8
Source dataset: uspto-grants-2014_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08691865B2

Reaction notes

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