3-Allyl-4-hydroxybenzaldehyde → 3-Allyl-4-[2-(5-methyl-2-phenyl-oxazol-4-yl)-ethoxy]-benzaldehyde
Reaction equation
[CH2:1]([C:4]1[CH:5]=[C:6]([CH:9]=[CH:10][C:11]=1[OH:12])[CH:7]=[O:8])[CH:2]=[CH2:3].[CH3:13][C:14]1[O:18][C:17]([C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)=[N:16][C:15]=1[CH2:25][CH2:26]OS(C)(=O)=O>>[CH2:1]([C:4]1[CH:5]=[C:6]([CH:9]=[CH:10][C:11]=1[O:12][CH2:26][CH2:25][C:15]1[N:16]=[C:17]([C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)[O:18][C:14]=1[CH3:13])[CH:7]=[O:8])[CH:2]=[CH2:3]Participants
Procedure
In analogy to the procedures described in examples 114 b], c] and d], 3-allyl-4-hydroxy-benzaldehyde was reacted with methanesulfonic acid 2-(5-methyl-2-phenyl-oxazol-4-yl)-ethyl ester [PCT Int. Appl. (2000) WO0008002] to give 3-allyl-4-[2-(5-methyl-2-phenyl-oxazol-4-yl)-ethoxy]-benzaldehyde. Treatment of 3-allyl-4-[2-(5-methyl-2-phenyl-oxazol-4-yl)-ethoxy]-benzaldehyde with (benzyloxycarbonyl-ethoxy-methyl)-triphenyl-phosphonium chloride (prepared in analogy to the procedure described for the synthesis of (benzyloxycarbonyl-methoxy-methyl)-triphenyl-phosphonium chloride in example 114 a]) then gave 3-{3-allyl-4-[2-(5-methyl-2-phenyl-oxazol-4-yl)-ethoxy]-phenyl}-2(Z,E)-ethoxy-acrylic acid benzyl ester, which was hydrogenated to yield [rac]-2-ethoxy-3-{4-[2-(5-methyl-2-phenyl-oxazol-4-yl)-ethoxy]-3-propyl-phenyl}-propionic acid as colorless solid.
Sources & evidence
- ORD record
- ord-d8d8469790ce445a986f1b3ecc8be067
- Source dataset
- uspto-grants-2003_11
- Patent number
- US06642389B2
Reaction notes
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