(Furan-2-yl)-N,N,N-trimethylmethanaminium iodide → HCID 21520115, compound

HRID 1282792Notes

Reaction equation

[SH:1][C:2]1[CH:3]=[C:4]([CH:8]=[C:9]([S:18](=[O:21])(=[O:20])[NH2:19])[C:10]=1[O:11][C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)[C:5]([OH:7])=[O:6].C(=O)([O-])[O-].[K+].[K+].[I-].C[N+](C)(C)[CH2:31][C:32]1[O:36][CH:35]=[CH:34][CH:33]=1.[OH-].[Na+]>C(OCCOCCOCC)C>[O:36]1[CH:35]=[CH:34][CH:33]=[C:32]1[CH2:31][S:1][C:2]1[CH:3]=[C:4]([CH:8]=[C:9]([S:18](=[O:21])(=[O:20])[NH2:19])[C:10]=1[O:11][C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)[C:5]([OH:7])=[O:6]

Participants

Conditions

Temperature: 110 °C

Procedure

To a solution of 3-mercapto-4-phenoxy-5-sulfamylbenzoic acid (1.6 g) in diethylene glycol diethyl ether (15 ml), anhydrous potassium carbonate (0.5 g) and trimethylfurfurylammonium iodide (2 g) were added. The resulting mixture is stirred at 110°C. for 4 hours, cooled and poured into 0.3 N sodium hydroxide (75 ml). After extraction twice with diethyl ether, the aqueous layer is adjusted to pH 3 by addition of acetic acid. The reaction product is extracted with ethyl acetate, and the resulting organic solution is evaporated in vacuo. The residue is triturated with aqueous acetone giving rise to crystallisation. The 3-(2-furylmethylthio)-4-phenoxy-5-sulfamylbenzoic acid thus obtained is recrystallized from aqueous ethanol and dried. The compound is obtained with a melting point of 214°-216°C.

Workup

temperaturecooled
extractionAfter extraction twice with diethyl ether
additionthe aqueous layer is adjusted to pH 3 by addition of acetic acid
extractionThe reaction product is extracted with ethyl acetate
customthe resulting organic solution is evaporated in vacuo
customThe residue is triturated with aqueous acetone giving rise to crystallisation

Sources & evidence

ORD record: ord-feedc16270024ab79d3caeb56f5b3a20
Source dataset: uspto-grants-1976_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US03972886

Reaction notes

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