Potassium Hydroxide → HCID 19101933, compound

HRID 1974661Notes

Reaction equation

HRID 1974661 reaction equation
[CH2:1]1[C:6]2[CH:7]=[C:8]([C:15]([O:17]C)=[O:16])[C:9]([C:11]([O:13]C)=[O:12])=[CH:10][C:5]=2[CH2:4][CH2:3][O:2]1.[OH-].[K+:20]>CO>[CH2:1]1[C:6]2[CH:7]=[C:8]([C:15]([O-:17])=[O:16])[C:9]([C:11]([O-:13])=[O:12])=[CH:10][C:5]=2[CH2:4][CH2:3][O:2]1.[K+:20].[K+:20]

Participants

4

Reactant 2

HCID 14797Potassium HydroxideHCID 19101927HCID 19101927, compound

Product 1

HCID 19101933HCID 19101933, compoundYield 73.7%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Conditions

Temperature
49 °C

Procedure

A mixture of dimethyl 3,4-dihydro-1H-2-benzopyran-6,7-dicarboxylate (16.5 g, 0.0659 mol), potassium hydroxide (10.4 g, 0.184 mol) and methanol is stirred for 3 hours at 49° C., cooled to room temperature, and filtered. The filter cake is dried to afford the title product as a cream-colored solid (14.5 g) mp >250° C.

Workup

  1. temperaturecooled to room temperature
  2. filtrationfiltered
  3. customThe filter cake is dried

Sources & evidence

ORD record
ord-cd732027d08a479bb39e107e7d90a697
Source dataset
uspto-grants-1994_02
Patent number
US05283335

Reaction notes

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