Sodium hydride → 2-(pyridin-3-yl)-1-(2,3,8-trimethyl-3,4-dihydro-1H-pyrido[4,3-b]indol-5(2H)-yl)propan-2-ol

HRID 1630623Notes

Reaction equation

[CH3:1][N:2]1[CH:15]([CH3:16])[CH2:14][C:5]2[NH:6][C:7]3[CH:8]=[CH:9][C:10]([CH3:13])=[CH:11][C:12]=3[C:4]=2[CH2:3]1.[H-].[Na+].[CH3:19][C:20]1([C:23]2[CH:24]=[N:25][CH:26]=[CH:27][CH:28]=2)[CH2:22][O:21]1>CN(C=O)C>[N:25]1[CH:26]=[CH:27][CH:28]=[C:23]([C:20]([OH:21])([CH3:22])[CH2:19][N:6]2[C:7]3[CH:8]=[CH:9][C:10]([CH3:13])=[CH:11][C:12]=3[C:4]3[CH2:3][N:2]([CH3:1])[CH:15]([CH3:16])[CH2:14][C:5]2=3)[CH:24]=1

Participants

Conditions

Temperature: 0 °C

Procedure

2,3,8-Trimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole (214 mg, 1 mmol) was dissolved in DMF (3 mL) and NaH (80 mg, 3.33 mmol) was added portionwise at 0° C. The reaction mixture was stirred at 0° C. for 15 min. The solution of 3-(2-methyloxiran-2-yl)pyridine (270 mg, 2 mmol) in DMF (2 mL) was added dropwise at 0° C. and the reaction mixture was stirred at 0° C. for 10 min and at RT for 16 h. Completion of reaction was monitored by LCMS. The reaction mixture was poured onto crushed ice slowly and extracted with EtOAc (3×30 mL). The organic layer was washed with water (7×40 mL), dried over anhydrous sodium sulfate and concentrated under vacuum to obtain the crude product that was purified by reverse HPLC to give 23 mg of 2-(pyridin-3-yl)-1-(2,3,8-trimethyl-3,4-dihydro-1H-pyrido[4,3-b]indol-5(2H)-yl)propan-2-ol. 1H NMR (CDCl3, freebase) δ (ppm): 8.73 (s, 1H), 8.47 (d, 1H), 7.2 (d, 1H), 7.11 (s, 1H), 7.04 (d, 2H), 6.90 (d, 1H), 4.15 (dd, 2H), 3.78 (dd, 1H), 3.6 (dd, 1H), 2.9 (m, 2H), 2.7 (dd, 1H), 2.43 (s, 3H), 2.4 (s, 3H), 1.6 (s, 3H), 1.14 (d, 3H). Separation by chiral HPLC provided diastereomers II-146a-d.

Workup

stirringthe reaction mixture was stirred at 0° C. for 10 min and at RT for 16 h
customCompletion of reaction
additionThe reaction mixture was poured
customonto crushed ice slowly
extractionextracted with EtOAc (3×30 mL)
washThe organic layer was washed with water (7×40 mL)
dry with materialdried over anhydrous sodium sulfate
concentrationconcentrated under vacuum
customto obtain the crude product that
customwas purified by reverse HPLC

Sources & evidence

ORD record: ord-98928cb88d4d45d0be9c5ff461cc83ca
Source dataset: uspto-grants-2014_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08791132B2

Reaction notes

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