18-crown-6 ether in toluene T=20°C; 20 h;

1: 52 percent / 18-crown-6 / toluene / 20 h / 20 °C 2: 60.6 percent / hydrazine / CH2Cl2; methanol / 14 h / 20 °C View Scheme

tetrachloromethane; bromine Belichtung mit einer 500-Watt-Lampe;

calcium carbonate in 1,4-dioxane; water 3 h; Heating;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '113916', constants.ctx, '0')">N-bromosuccinmide</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1098295', constants.ctx, '0')">tetrachloromethane</a> <br />T=20&deg;C;&nbsp;14&nbsp;h;&nbsp;&nbsp;Photolysis;&nbsp;<br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 91 percent / pyridine / 6 h / 20 &deg;C<br />2: 83 percent / N-bromosuccinimide / CCl₄ / 14 h / 20 &deg;C / Photolysis<br /> <br /> &nbsp;