sodium methylate in diethyl ether 1 h; Ambient temperature;

1: acetylacetone With sodium hydride in diethyl ether Metallation; 1 h; Heating; 2: α-chloro-α-formyl-γ-butyrolactone in diethyl ether T=20°C; Formylation; elimination;

diethyl sodium phosphite in diethyl ether T=-20°C; 1 h;

sodium methylate in diethyl ether 1 h; Ambient temperature;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '3902968', constants.ctx, '0')">chlorine</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1098295', constants.ctx, '0')">tetrachloromethane</a> <br />T=20 - 30&deg;C;&nbsp;1&nbsp;h;&nbsp;<br /> &nbsp;