Hydrochloric Acid → HCID 89810543, compound

HRID 1505640Notes

Reaction equation

HRID 1505640 reaction equation
C([O:3][C:4]([C:6]1(C(OCC)=O)[C:14]2[S:15][CH:16]=[CH:17][C:13]=2[C:12](C(OCC)=O)([C:18]([O:20]CC)=[O:19])[C:8]2[S:9][CH:10]=[CH:11][C:7]1=2)=[O:5])C.[OH-].[K+].Cl>CO>[S:15]1[CH2:16][CH2:17][C:13]2[C:12]([C:18]([OH:20])=[O:19])=[C:8]3[C:7](=[C:6]([C:4]([OH:5])=[O:3])[C:14]1=2)[CH:11]=[CH:10][S:9]3

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 14797Potassium HydroxideHCID 10972868HCID 10972868, compound

Product 1

HCID 89810543HCID 89810543, compound

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

Benzo[1,2-b;4,5-b′]dithiophene-4,4,8,8-tetracarboxylic acid tetraethyl ester (2 g) was suspended in methanol (60 g) and KOH (7.5 g) under inert atmosphere and heated to reflux for 5 hours. The reaction mixture was acidified with 2M HCl (62.5 g) and the yellow precipitate filtered off, washed with water and dried in vacuum to yield 2,3-dihydro-benzo[1,2-b;4,5-b′]dithiophene-4,8-dicarboxylic acid in quantitative yield.

Workup

  1. temperatureto reflux for 5 hours
  2. filtrationthe yellow precipitate filtered off
  3. washwashed with water
  4. customdried in vacuum

Sources & evidence

ORD record
ord-cfe474f6a9494e47b6f5a2b639c0c1a6
Source dataset
uspto-grants-2015_12
Patent number
US09216994B2

Reaction notes

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