Reaktion #2844

Reaktionsgleichung

(5-iodo-thiophene-3-yl)methanol

DMF

→

title compound

4-Hydroxymethyl-thiophene-2-carbonitrile

Lösungsmittel

EtOAc

Reaktionsbedingungen

Aufarbeitung

1. 1
   WaschenThe resulting solution is washed with 1N NH4OH, H2O and sat. NaCl
2. 2
   TrocknenThe organic layer is dried over MgSO4
3. 3
   Filtrationfiltered
4. 4
   Einengenconcentrated
5. 5
   SonstigeThe crude product is purified by column chromatography
6. 6
   Wascheneluting with gradient of 20% EtOAc/hexanes to 30% EtOAc/hexanes

Vorschrift

To a solution of (5-iodo-thiophene-3-yl)methanol (42 g, 176 mmol) in 150 mL of DMF is added zinc cyanide (12.4 g, 106 mmol) and tetrakis(triphenylphospine)palladium (0) (8.13 g, 7.04 mmol). The solution is heated to 80° C. After 6 h, the solution is diluted with 3 L of EtOAc. The resulting solution is washed with 1N NH4OH, H2O and sat. NaCl. The organic layer is dried over MgSO4, filtered and concentrated. The crude product is purified by column chromatography eluting with gradient of 20% EtOAc/hexanes to 30% EtOAc/hexanes to afford the title compound (10 g, 72 mmol) as a clear oil.

Quelle