Imidazole → HCID 10527478, compound

HRID 2396621Notes

Reaction equation

[OH:1][C:2]1[C:10]([CH2:11]/[CH:12]=[C:13](\[CH3:20])/[CH2:14][CH2:15][C:16]([O:18][CH3:19])=[O:17])=[C:9]([O:21][CH3:22])[C:8]([CH3:23])=[C:7]2[C:3]=1[C:4](=[O:24])[O:5][CH2:6]2.[Si:25](Cl)([C:28]([CH3:31])([CH3:30])[CH3:29])([CH3:27])[CH3:26].N1C=CN=C1.O>CN(C)C=O>[Si:25]([O:1][C:2]1[C:10]([CH2:11]/[CH:12]=[C:13](\[CH3:20])/[CH2:14][CH2:15][C:16]([O:18][CH3:19])=[O:17])=[C:9]([O:21][CH3:22])[C:8]([CH3:23])=[C:7]2[C:3]=1[C:4](=[O:24])[O:5][CH2:6]2)([C:28]([CH3:31])([CH3:30])[CH3:29])([CH3:27])[CH3:26]

Participants

Conditions

Temperature: 50 °C

Procedure

To methyl (E) 6-(1,3-dihydro-4-hydroxy-6-methoxy-7-methyl-3-oxoisobenzofuran-5-yl)-4-methyl-4-hexenoate (Tetrahedron, 28, 4395, 1972) (10.0 g) in dimethylformamide (75 ml) was added t-butyldimethylsilyl chloride (4.97 g) and imidazole (2.24 g). The mixture was heated at 50° C. for 1 hour, then left at room temperature for 24 hours, then poured into water and extracted with ethyl acetate. The extract was washed twice with water, dried over magnesium sulfate and evaporated under vacuum to give methyl (E) 6-(4-t-butyldimethylsilyloxy-1,3-dihydro-6-methoxy-7-methyl-3-oxoisobenzofuran-5-yl)-4-methyl-4-hexenoate as a beige solid.

Workup

extractionextracted with ethyl acetate
washThe extract was washed twice with water
dry with materialdried over magnesium sulfate
customevaporated under vacuum

Sources & evidence

ORD record: ord-a4c1d52d2e37401d93b59081e35e51bc
Source dataset: uspto-grants-1996_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05493030

Reaction notes

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