Sodium Azide → (3aS,4R,6aR)-4-azido-2-benzyloctahydrocyclopenta[c]pyrrole

HRID 2363448Notes

Reaction equation

CS(O[C@@H:6]1[C@H:13]2[C@H:9]([CH2:10][N:11]([CH2:14][C:15]3[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=3)[CH2:12]2)[CH2:8][CH2:7]1)(=O)=O.[N-:21]=[N+:22]=[N-:23].[Na+]>CN(C)C(=O)C.C(OCC)(=O)C>[N:21]([C@H:6]1[C@H:13]2[C@H:9]([CH2:10][N:11]([CH2:14][C:15]3[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=3)[CH2:12]2)[CH2:8][CH2:7]1)=[N+:22]=[N-:23]

Participants

Conditions

Temperature: 90 °C

Procedure

(3aS,4S,6aR)-2-Benzyloctahydrocyclopenta[c]pyrrol-4-yl methanesulfonate (1.686 g, 5.71 mmol) from Step C and sodium azide (0.557 g, 8.56 mmol) were combined in N,N-dimethylacetamide (10 mL). The reaction was heated at 90° C. for 15 hours. The reaction was cooled and diluted with 200 mL of ethyl acetate and then quenched with 30 mL water. The organic layer was removed and washed with 2×20 mL of water, then 20 mL of brine. The solvent was removed in vacuo to give (3aS,4R,6aR)-4-azido-2-benzyloctahydrocyclopenta[c]pyrrole: 1H NMR (300 MHz, CDCl3) δ ppm 7.36-7.27 (m, 4H), 7.22 (dd, J=2.9, 5.8, 1H), 3.72-3.61 (m, 1H), 3.54 (s, 2H), 2.76-2.60 (m, 1H), 2.55-2.40 (m, 4H), 2.35 (dd, J=3.5, 9.1, 1H), 2.07-1.86 (m, 2H), 1.72-1.60 (m, 1H), 1.49-1.38 (m, 1H).

Workup

temperatureThe reaction was cooled
customquenched with 30 mL water
customThe organic layer was removed
washwashed with 2×20 mL of water
customThe solvent was removed in vacuo

Sources & evidence

ORD record: ord-533b08b4315d470aad6c6c0c6caadcd6
Source dataset: uspto-grants-2014_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08691865B2

Reaction notes

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