Benzyl Bromide → HCID 178525078, compound

HRID 2091662Notes

Reaction equation

[NH2:1][C@@H:2]1[CH2:7][CH2:6][C@H:5]([C:8]([OH:10])=[O:9])[CH2:4][CH2:3]1.C(=O)([O-])[O-].[K+].[K+].[CH2:17](Br)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1>C(#N)C>[CH2:17]([N:1]([C@@H:2]1[CH2:7][CH2:6][C@H:5]([C:8]([O:10][CH2:8][C:5]2[CH:6]=[CH:7][CH:2]=[CH:3][CH:4]=2)=[O:9])[CH2:4][CH2:3]1)[CH2:17][C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1

Participants

Conditions

Temperature: 80 °C

Procedure

cis-4-Aminocyclohexanecarboxylic acid (10.0 g, 67.48 mmol) was dissolved in 140 mL of dry acetonitrile. Solid potassium carbonate (28.0 g, 202.6 mmol) was added. The suspension was heated to about 80° C. To this solution, was added benzyl bromide (28.09 mL, 236.2 mmol) in 70 mL of acetonitrile, dropwise via addition funnel. The reaction mixture was stirred at about 80° C. under nitrogen for about 2 hours then about 40° C. overnight. The reaction was cooled to room temperature and the suspension was filtered. The filtrate was concentrated under reduced pressure. The compound was purified using column chromatography on silica gel (100% hexanes to remove excess benzyl bromide, then 10% ethyl acetate in hexanes). The product was isolated as a white solid (14.35 g, 51% yield): ES-MS (m/z) 414.

Workup

additiondropwise via addition funnel
customabout 40° C. overnight
temperatureThe reaction was cooled to room temperature
filtrationthe suspension was filtered
concentrationThe filtrate was concentrated under reduced pressure
customThe compound was purified
customto remove excess benzyl bromide

Sources & evidence

ORD record: ord-61632791d2894e09b8f373d3fb78c4c0
Source dataset: uspto-grants-2013_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08440661B2

Reaction notes

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