Methanol → 4-(2,2,4,4-Tetramethyl-8-prop-2-ynyl-chroman-6-ylethynyl)-phenyl-acetic acid
Reaktionsgleichung
C[O:2][C:3](=[O:34])[CH2:4][C:5]1[CH:10]=[CH:9][C:8]([C:11]#[C:12][C:13]2[CH:14]=[C:15]3[C:20](=[C:21]([CH2:23][C:24]#[C:25][Si](C)(C)C)[CH:22]=2)[O:19][C:18]([CH3:31])([CH3:30])[CH2:17][C:16]3([CH3:33])[CH3:32])=[CH:7][CH:6]=1.CO.O1CCCC1.O.[OH-].[Li+]>O>[CH3:30][C:18]1([CH3:31])[CH2:17][C:16]([CH3:32])([CH3:33])[C:15]2[C:20](=[C:21]([CH2:23][C:24]#[CH:25])[CH:22]=[C:13]([C:12]#[C:11][C:8]3[CH:7]=[CH:6][C:5]([CH2:4][C:3]([OH:34])=[O:2])=[CH:10][CH:9]=3)[CH:14]=2)[O:19]1Komponenten
6
Versuchsvorschrift
Following general procedure K and using {4-[2,2,4,4-tetramethyl-8-(3-trimethylsilanyl-prop-2-ynyl)-chroman-6-ylethynyl]-phenyl}-acetic acid methyl ester (Compound 48, 0.105 g, 0.21 mmol), methanol (3 mL), tetrahydrofuran (3 mL), water (1.5 mL) and lithium hydroxide monohydrate (0.128 g, 3.07 mmol), the title compound was obtained as a pale yellow solid (0.077 g, 95%). 1H NMR (300 MHz, CDCl3): δ7.51 (d, 1H, J=2.2 Hz), 7.49 (d, 2H, J=8.2 Hz), 7.39 (d, 1H, J=2.2 Hz), 7.25 (d, 2H, J=8.2 Hz), 3.66 (s, 2H), 3.52 (d, 2H, J=2.6 Hz), 2.61 (t, 1H, J=2.6 Hz), 1.83 (s, 2H), 1.36 (s, 6H), 1.35 (s, 6H).
Quellen und Nachweise
- ORD-Eintrag
- ord-7b89d6a853594c888727bbbb854db39b
- Quelldatensatz
- uspto-grants-2008_04
- Patentnummer
- US07351737B2
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