Reaktion #6975

Reaktionsgleichung

2-(pyridin-2-ylamino)-thiazole-5-carbaldehyde

compound 1A

2-(pyridin-2-ylamino)-thiazole-5-carbaldehyde

3-amino-4-fluorobenzoic acid

triethylsilane

→

4-fluoro-3-{[2-(pyridin-2-ylamino)-thiazol-5-ylmethyl]-amino}-benzoic acid

Ausbeute 91.3%

Lösungsmittel

methylene chloride

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONwere added
2. 2
   SonstigeThe above reaction mixture
3. 3
   Einengenconcentrated in vacuo
4. 4
   Sonstigethe resulting slurry was triturated with methanol

Vorschrift

To a suspension of 2-(pyridin-2-ylamino)-thiazole-5-carbaldehyde (1.0 g, 4.90 mmol, compound 1A) in methylene chloride (20 mL) at RT 3-amino-4-fluorobenzoic acid (0.95 g, 4.90 mmol) TFA (5 mL) and triethylsilane (1.71 mg, 14.7 mmol) were added. The above reaction mixture was stirred at RT for 4 h, then concentrated in vacuo and the resulting slurry was triturated with methanol to afford 4-fluoro-3-{[2-(pyridin-2-ylamino)-thiazol-5-ylmethyl]-amino}-benzoic acid as light yellow solid (1.54 g, 91%) (M+H)+=345.

Quelle