Chlorosulfonic acid → Methyl N-[6-(chlorosulfonyl)-1H-benzimidazol-2-yl]carbamate

HRID 413821

Reaktionsgleichung

Reaktionsgleichung von HRID 413821
[C:1]([NH:5][C:6]1[NH:7][C:8]2[CH:14]=[CH:13][CH:12]=[CH:11][C:9]=2[N:10]=1)([O:3][CH3:4])=[O:2].[Cl:15][S:16](O)(=[O:18])=[O:17]>>[Cl:15][S:16]([C:13]1[CH:12]=[CH:11][C:9]2[N:10]=[C:6]([NH:5][C:1]([O:3][CH3:4])=[O:2])[NH:7][C:8]=2[CH:14]=1)(=[O:18])=[O:17]

Komponenten

3

Edukt 2

HCID 24638Chlorosulfonic acidHCID 25429Carbendazim

Produkt 1

HCID 15124047Methyl N-[6-(chlorosulfonyl)-1H-benzimidazol-2-yl]carbamateAusbeute 78 %

Versuchsvorschrift

A solution of 2-carbomethoxyamino-benzimidazole (5.0 g, 0.026 mole) in chlorosulfonic acid (35.00 mL) was stirred at 0° C. for 30 min. and at room temperature for 3 hr. The resulting dark colored reaction mixture was carefully poured into an ice-water mixture (200 mL) and stirred at room temperature for 30 min. The resulting precipitate was filtered and washed thoroughly with cold water (500 ml). The solid was dried overnight under high vacuum in a desiccator over NaOH pallets to yield the desired compound (5.9 g. 78%) as a grey powder. 1H NMR (DMSO-d6) 3.89 (s, 3H), 7.55 (d, 1H, J=8.4 Hz.) 7.65 (d, 1H, J=8.4 Hz), 7.88 (s, 1H).

Aufarbeitung

  1. filtrationThe resulting precipitate was filtered
  2. washwashed thoroughly with cold water (500 ml)
  3. dry with materialThe solid was dried overnight under high vacuum in a desiccator over NaOH pallets

Quellen und Nachweise

ORD-Eintrag
ord-bc7c9f9a35404be49ec29414babf70be
Quelldatensatz
uspto-grants-2003_05
Patentnummer
US06569882B2

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