Triethylamine → 4-Ethyl-5-trimethylsilanylethynyl-thiazol-2-ylamine

Participants

Reaction Steps

Under a stream of Ar the above prepared 4-ethyl-5-iodo-thiazol-2-ylamine (1.67 g, 6.57 mmol) was dissolved in 40 mL of acetonitrile and treated successively with triethylamine (2.73 mL, 3 eq.), Cul (0.125 g, 0.1 eq.), (Ph3P)2PdCl2 (0.46 g, 0.1 eq.) and ethynyltrimethylsilane (2.73 mL, 3 eq.). The flask was closed with a septum and allowed to stir for 15 h at ambient temperature. The reaction mixture was then poured onto icewater/NH4Cl, twofold extracted with ethyl acetate, washed with water and brine, dried over sodium sulfate, and evaporated to dryness. Flash chromatography (SiO2, hexane/AcOEt=7/3) afforded finally 0.598 g of the title compound as brown viscous oil, contaminated with some des-iodo-compound.

Provenance & Evidence