Pyridine → 3,5-Bis-methoxymethoxy-4-((E)-3-phenyl-allyl)-benzaldehyde
Reaction equation
N1C=CC=CC=1.[CH3:7][O:8][CH2:9][O:10][C:11]1[CH:12]=[C:13]([CH2:30][OH:31])[CH:14]=[C:15]([O:26][CH2:27][O:28][CH3:29])[C:16]=1[CH2:17]/[CH:18]=[CH:19]/[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1>C(Cl)Cl>[CH3:29][O:28][CH2:27][O:26][C:15]1[CH:14]=[C:13]([CH:12]=[C:11]([O:10][CH2:9][O:8][CH3:7])[C:16]=1[CH2:17]/[CH:18]=[CH:19]/[C:20]1[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=1)[CH:30]=[O:31]Participants
Procedure
To a solution of pyridine (62 g, 0.78 mol) in CH2Cl2 (500 mL) were added CrO3 (39 g, 0.39 mol) and Silica gel (40 g) in several portions at 0° C. After stirring for 10 min, [3,5-bis-methoxymethoxy-4-((E)-3-phenyl-allyl)-phenyl]-methanol (220e) (45 g, 0.13 mol) was added in one portion. The mixture was stirred at room temperature overnight. TLC (EtOAc/petroleum ether=1/2) indicated that the reaction was complete. The reaction mixture was filtered and the filter cake was washed with Et2O. The combined filtrates were concentrated. The residue was suspended in Et2O and filtered again. The filtrate was concentrated under vacuum to give the crude title compound (45 g, 100% yield) as a yellow oil, which was used directly in the next step without further purification. 1H NMR (400 MHz, CDCl3): δ 9.89 (s, 1H), 7.16˜7.41 (m, 5H), 6.25˜6.44 (m, 2H), 5.36 (s, 4H), 3.66 (d, 2H), 3.47 (s, 6H).
Workup
- stirringThe mixture was stirred at room temperature overnight
- filtrationThe reaction mixture was filtered
- washthe filter cake was washed with Et2O
- concentrationThe combined filtrates were concentrated
- filtrationfiltered again
- concentrationThe filtrate was concentrated under vacuum
Sources & evidence
- ORD record
- ord-53705dd6a40945acb755e0b03b82f27c
- Source dataset
- uspto-grants-2010_11
- Patent number
- US07842713B2
Reaction notes
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