2,4,6-Trimethylaniline → alpha-Ethynyl-N-(2,4,6-trimethylphenyl)-benzenemethanamine

HRID 14423

Reaktionsgleichung

Reaktionsgleichung von HRID 14423
C(=O)([O-])O[CH2:3][CH:4]=[CH:5][C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1.[CH3:14][C:15]1[CH:21]=[C:20]([CH3:22])[CH:19]=[C:18]([CH3:23])[C:16]=1[NH2:17]>>[C:4]([CH:5]([C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1)[NH:17][C:16]1[C:18]([CH3:23])=[CH:19][C:20]([CH3:22])=[CH:21][C:15]=1[CH3:14])#[CH:3]

Komponenten

3

Edukt 2

HCID 69132,4,6-TrimethylanilineHCID 71446589Cinnamyl carbonate

Produkt 1

HCID 86607476alpha-Ethynyl-N-(2,4,6-trimethylphenyl)-benzenemethanamineAusbeute 85 %

Versuchsvorschrift

The general procedure was followed with cinnamyl carbonate (0.188 g, 0.979 mmol) and 2,4,6-trimethylaniline (0.170 g, 1.25 mmol). The reaction was conducted at room temperature for 12 h. 1H NMR analysis of the crude reaction mixture indicated the ratio of regioisomers to be 97/3. The mixture was purified by flash column chromatography on silica gel (1% ethyl acetate in hexanes) to give the title compound (0.207 g, 85%). HPLC analysis indicated the enantiomeric excess of the product was 96% [Diacel CHIRALCEL OD-H (0.46 cm×25 cm); hexane/2-propanol=99.75/0.25; flow rate=0.6 mL/min; detection wavelength=254 nm; TR=17.0 (major), 19.5 (minor) min]: [α]DRT=(c, CHCl3). 1H NMR (400.13 MHz, CDCl3) δ 7.38-7.23 (m, 5H), 6.78 (s, 2H), 6.05 (ddd, J=17.2, 10.0, 6.4 Hz, 1H), 5.25 (dt, J=16.8, 1.6 Hz, 1H), 5.17 (dt, J=10.4, 1.3 Hz, 1H), 4.61 (t, J=6.4 Hz, 1H), 3.12 (br s, 1H), 2.22 (s, 3H), 2.11 (s, 6H). 13C NMR (100.59 MHz, CDCl3) δ 142.92, 141.89, 139.34, 130.89, 129.77, 129.34, 128.41, 127.10, 126.93, 115.51, 64.19, 20.56, 18.61. Anal. Calcd for C18H21N: C, 86.01; H, 8.42; N, 5.57. Found: C, 86.18; H, 8.49; N, 5.62.

Aufarbeitung

  1. custom1H NMR analysis of the crude reaction mixture
  2. customThe mixture was purified by flash column chromatography on silica gel (1% ethyl acetate in hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-5acc5f972aa7412daac73046d4b1f8af
Quelldatensatz
uspto-grants-2010_06
Patentnummer
US07732365B2

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