Selenium chloride in diethyl ether T=22°C; 24 h;

selenium; n-butyllithium; Selenium chloride in diethyl ether; dichloromethane 1.) 0 deg C, 2.) r.t., overnight; Yield given. Further byproducts given. Yields of byproduct given. Title compound not separated from byproducts;

selenium; n-butyllithium; Selenium chloride in diethyl ether; dichloromethane 1.) 0 deg C, 2.) r.t., overnight; Yield given. Further byproducts given. Yields of byproduct given. Title compound not separated from byproducts;