Cesium carbonate → [(S)-7-Cyano-4-(2-methoxy-benzyl)-1,2,3,4-tetrahydro-cyclopenta[b]indol-2-yl]-carbamic acid isopropyl ester

HRID 449835Notes

Reaction equation

[CH:1]([O:4][C:5](=[O:21])[NH:6][C@@H:7]1[CH2:20][C:10]2[NH:11][C:12]3[CH:13]=[CH:14][C:15]([C:18]#[N:19])=[CH:16][C:17]=3[C:9]=2[CH2:8]1)([CH3:3])[CH3:2].C(=O)([O-])[O-].[Cs+].[Cs+].[CH3:28][O:29][C:30]1[CH:37]=[CH:36][CH:35]=[CH:34][C:31]=1[CH2:32]Cl>CN(C=O)C.O>[CH:1]([O:4][C:5](=[O:21])[NH:6][C@@H:7]1[CH2:20][C:10]2[N:11]([CH2:32][C:31]3[CH:34]=[CH:35][CH:36]=[CH:37][C:30]=3[O:29][CH3:28])[C:12]3[CH:13]=[CH:14][C:15]([C:18]#[N:19])=[CH:16][C:17]=3[C:9]=2[CH2:8]1)([CH3:3])[CH3:2]

Participants

Conditions

Temperature: 50 °C

Procedure

A mixture of ((S)-7-cyano-1,2,3,4-tetrahydro-cyclopenta[b]indol-2-yl)-carbamic acid isopropyl ester (2.0 g, 7.06 mmol) and cesium carbonate (3.22 g, 9.88 mmol) in DMF (40 mL) is treated with 2-methoxybenzyl chloride (1.16 g, 7.41 mmol). The reaction is heated at 50° C. for 18 h. The reaction is cooled to room temperature and diluted with water (300 mL). The white solid is collected and washed with water. The solid is dried in a 40° C. vacuum oven. After drying, 2.80 g (98%) product is obtained as a white solid. LC-ES/MS m/z 404 [M+H]+, TR=2.83 min.

Workup

temperatureThe reaction is cooled to room temperature
customThe white solid is collected
washwashed with water
customThe solid is dried in a 40° C. vacuum oven
customAfter drying

Sources & evidence

ORD record: ord-808e963c87c24968845c8312cdb0f12c
Source dataset: uspto-grants-2013_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08486943B2

Reaction notes

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