1: 92 percent / sodium hydroxide, water / 10 h / Heating 2: 62 percent / acetic anhydride / 14 h / Heating 3: 58 percent / potassium hydroxide, water / 6 h / 70 °C / Heating 4: 65 percent / 1.) hydrazine hydrate;2.) potassium hydroxide, diethylene glycol / 1.) reflux, 5 h; 2.) 230 deg C - 240 deg C, 20 h 5: 92 percent / zinc bromide, 50percent hydrobromic acid / 16 h / 60 - 70 °C / Heating View Scheme

1: 92 percent / sodium hydroxide, water / 10 h / Heating 2: 62 percent / acetic anhydride / 14 h / Heating 3: 58 percent / potassium hydroxide, water / 6 h / 70 °C / Heating 4: 65 percent / 1.) hydrazine hydrate;2.) potassium hydroxide, diethylene glycol / 1.) reflux, 5 h; 2.) 230 deg C - 240 deg C, 20 h View Scheme

1: 92 percent / sodium hydroxide, water / 10 h / Heating 2: 62 percent / acetic anhydride / 14 h / Heating View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '3917256', constants.ctx, '0')">N-benzyl-trimethylammonium hydroxide</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1098229', constants.ctx, '0')">methanol</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '906698', constants.ctx, '0')"><i>tert</i>-butyl alcohol</a> <br />T=10 - 20&deg;C;&nbsp;<br /> &nbsp;