1: With triethylsilane; triphenylmethylium tetrakis(pentafluorophenyl)borate in 1,2-dichloro-benzene T=20°C; 16 h; Schlenk techniqueInert atmosphere; 2: With water in 1,2-dichloro-benzene Schlenk techniqueInert atmosphere; Reagent/catalyst;

tetramethylene sulfide; diethylzinc in dichloromethane; toluene T=20°C; 16 h;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '471803', constants.ctx, '0')">anthranilic acid</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1730800', constants.ctx, '0')">dichloromethane</a> <br />T=60&deg;C;&nbsp;72&nbsp;h;&nbsp;&nbsp;Molecular sieve;&nbsp;<br /> &nbsp;

Stage #1: <b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '6888', constants.ctx, '0')">3-keto-2H,3H-1,2-benzisothiazole 1,1-dioxide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '8128145', constants.ctx, '0')">lithium bromide</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1730800', constants.ctx, '0')">dichloromethane</a> <br />T=20&deg;C;&nbsp;3&nbsp;h;&nbsp;<br />Stage #2: &nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1730800', constants.ctx, '0')">dichloromethane</a> <br />&nbsp;Molecular sieveReflux;&nbsp;<br /> &nbsp;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '11342962', constants.ctx, '0')">tellurium</a> <br />&nbsp;1) toluene, reflux, 1 h, 2) reflux, 0.5 h;&nbsp;&nbsp;Yield given. Multistep reaction;&nbsp;<br /> &nbsp;