sulfuric acid

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '3570983', constants.ctx, '0')">tetrabutylammomium bromide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '3916152', constants.ctx, '0')">tetra-(n-butyl)ammonium iodide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '605266', constants.ctx, '0')">ethylene dibromide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '1718733', constants.ctx, '0')">ethanol</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '8132069', constants.ctx, '0')">niobium bromide</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '605365', constants.ctx, '0')">N,N-dimethyl-formamide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '741857', constants.ctx, '0')">acetonitrile</a> <br />T=70&deg;C;&nbsp;Michael addition;&nbsp;&nbsp;Electrolysis;&nbsp;<br /> &nbsp;