2,3-dihydro-7-hydroxy-8-propyl-4H-1-benzopyran-4-one → 6-{2-(2-Carboxy-ethyl)-3-[6-(4-oxo-8-propyl-chroman-7-yloxy)-hexyl]-phenoxy}-hexanoic acid
Reaction equation
[OH:1][C:2]1[CH:12]=[CH:11][C:5]2[C:6](=[O:10])[CH2:7][CH2:8][O:9][C:4]=2[C:3]=1[CH2:13][CH2:14][CH3:15].C[O:17][C:18](=[O:48])[CH2:19][CH2:20][C:21]1[C:26]([CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32]OS(C)(=O)=O)=[CH:25][CH:24]=[CH:23][C:22]=1[O:38][CH2:39][CH2:40][CH2:41][CH2:42][CH2:43][C:44]([O:46]C)=[O:45]>>[C:44]([CH2:43][CH2:42][CH2:41][CH2:40][CH2:39][O:38][C:22]1[CH:23]=[CH:24][CH:25]=[C:26]([CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][O:1][C:2]2[CH:12]=[CH:11][C:5]3[C:6](=[O:10])[CH2:7][CH2:8][O:9][C:4]=3[C:3]=2[CH2:13][CH2:14][CH3:15])[C:21]=1[CH2:20][CH2:19][C:18]([OH:48])=[O:17])([OH:46])=[O:45]Participants
3
Procedure
Using the procedure of example 126, 2,3-dihydro-7-hydroxy-8-propyl-4H-1-benzopyran-4-one was converted into the title compound by alkylation with 2-[(6-methoxy-6-oxohexyl)oxy]-6-[6-(methylsulfonyl)oxyhexyl]benzenepropanoic acid methyl ester from the preceding example, followed by saponification, in 79% overall yield. The product was a colorless solid, mp 86°-88° C., recrystallized from hexane-ethyl acetate.
Sources & evidence
- ORD record
- ord-e03d2897a8a64d9783ce2a26cc04cf8f
- Source dataset
- uspto-grants-1995_07
- Patent number
- US05434186
Reaction notes
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