反応 #77983

反応方程式

ethyl 3,4-diaminophenylacetate

o-tolylisothiocyanate

diisopropylcarbodiimide

→

title compound

Ethyl (2-o-tolylamino-3H-benzimidazol-5-yl)acetate

溶媒

ethanol

反応条件

後処理

1. 1
   その他prepared
2. 2
   workup.WAITLeft
3. 3
   温度at reflux for 5 hours
4. 4
   その他then evaporated
5. 5
   workup.ADDITIONThe residue was subjected to flash chromatography on silica eluting with a mixture of 10% methanol and ether (1:9, v/v)

実験手順

A mixture of ethyl 3,4-diaminophenylacetate (5.8 g, prepared according to the procedure of Mederski et al, Bioorg Med Chem Left, 1998, 8, pages 17-22) and o-tolylisothiocyanate (4.9 g) in ethanol (100 mL) was kept at room temperature overnight then treated with diisopropylcarbodiimide (7.6 g). The mixture was stirred at reflux for 5 hours then evaporated. The residue was subjected to flash chromatography on silica eluting with a mixture of 10% methanol and ether (1:9, v/v) to give the title compound (5.2 g) as a yellow gum.

出典