Orcinol → 1,2-dihydro-9-hydroxy-7-methyl-4-oxo-4H-thieno[2,3-c][1]benzopyran

HRID 1282841Notes

Reaction equation

HRID 1282841 reaction equation
O=[C:2]1[CH2:6][CH2:5][S:4][CH:3]1[C:7]([O:9][CH3:10])=[O:8].[CH3:11][C:12]1[CH:13]=C(O)[CH:15]=[C:16]([CH:18]=1)[OH:17]>>[OH:17][C:16]1[C:15]2[C:2]3[CH2:6][CH2:5][S:4][C:3]=3[C:7](=[O:8])[O:9][C:10]=2[CH:11]=[C:12]([CH3:13])[CH:18]=1

Participants

3

Reactant 2

HCID 10436OrcinolHCID 1028702-Thiophenecarboxylic acid, tetrahydro-3-oxo-, methyl ester

Product 1

HCID 214338721,2-dihydro-9-hydroxy-7-methyl-4-oxo-4H-thieno[2,3-c][1]benzopyran

Procedure

Following a procedure similar to that described in Example 1B hereinabove, methyl 3-oxo-2,3,4,5-tetrahydrothiophene-2-carboxylate is reacted with 5-methylresorcinol to give 1,2-dihydro-9-hydroxy-7-methyl-4-oxo-4H-thieno[2,3-c] [1]benzopyran.

Sources & evidence

ORD record
ord-e92ef80926b849a7bb906be4224e4dd5
Source dataset
uspto-grants-1976_08
Patent number
US03972880

Reaction notes

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