3-chlorobenzene-1,2-diol

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 78.5 g of anhydrous K2CO3 are added, in parts, to a solution of 40.5 g of ethyl phenylpropiolate and 43.5 g of chloropyrocatechol in 200 cc of anhydrous acetone. The mixture is heated for 15 h. It is subsequently filtered and the solvent eliminated at low pressure. The residue is treated as indicated in Example 2. The product has b.p. 150°-155°C/0.3 mm. The mixture is heated for 15 h It is subsequently filtered The residue is treated

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 78.5 g of anhydrous K2CO3 are added, in parts, to a solution of 40.5 g of ethyl phenylpropiolate and 43.5 g of chloropyrocatechol in 200 cc of anhydrous acetone. The mixture is heated for 15 h. It is subsequently filtered and the solvent eliminated at low pressure. The residue is treated as indicated in Example 2. The product has b.p. 150°-155°C/0.3 mm. The mixture is heated for 15 h It is subsequently filtered The residue is treated

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 78.5 g of anhydrous K2CO3 are added, in parts, to a solution of 40.5 g of ethyl phenylpropiolate and 43.5 g of chloropyrocatechol in 200 cc of anhydrous acetone. The mixture is heated for 15 h. It is subsequently filtered and the solvent eliminated at low pressure. The residue is treated as indicated in Example 2. The product has b.p. 150°-155°C/0.3 mm. The mixture is heated for 15 h It is subsequently filtered The residue is treated