3,5-dichlorobenzamide

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: A mixture of 3,5-dichlorobenzamide (19.0 g) and methyl glyoxylate (8.8 g) in ethyl acetate (300 ml) was heated under reflux for 8 hours. The solvent was removed and the residual adduct was crystallised from chloroform-light petroleum. A portion (4.0 g) of the adduct was dissolved in a mixture of glacial acetic acid (30 ml) and acetonitrile (10 ml) with stirring, and then concentrated sulphuric acid (4 ml) was added. The mixture was kept at room temperature overnight when water (100 ml) was added. The precipitated solid was washed with water, dried, and crystallised from ethanol to give the product (2.45 g) as a colourless crystalline solid, m.p. 235°-237°. was heated under reflux for 8 hours The solvent was removed the residual adduct was crystallised from chloroform-light petroleum A portion (4.0 g) of the adduct was dissolved in a mixture of glacial acetic acid (30 ml) and acetonitrile (10 ml) concentrated sulphuric acid (4 ml) was added when water (100 ml) was added The precipitated solid was washed with water dried crystallised from ethanol

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

Procedure: A mixture of 3,5-dichlorobenzamide (19.0 g) and methyl glyoxylate (8.8 g) in ethyl acetate (300 ml) was heated under reflux for 8 hours. The solvent was removed and the residual adduct was crystallised from chloroform-light petroleum. A portion (4.0 g) of the adduct was dissolved in a mixture of glacial acetic acid (30 ml) and acetonitrile (10 ml) with stirring, and then concentrated sulphuric acid (4 ml) was added. The mixture was kept at room temperature overnight when water (100 ml) was added. The precipitated solid was washed with water, dried, and crystallised from ethanol to give the product (2.45 g) as a colourless crystalline solid, m.p. 235°-237°. was heated under reflux for 8 hours The solvent was removed the residual adduct was crystallised from chloroform-light petroleum A portion (4.0 g) of the adduct was dissolved in a mixture of glacial acetic acid (30 ml) and acetonitrile (10 ml) concentrated sulphuric acid (4 ml) was added when water (100 ml) was added The precipitated solid was washed with water dried crystallised from ethanol

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

Procedure: A suspension of 3,5-dichlorobenzamide, 2,2-dichloropropionaldehyde, benzotriazole, and p-toluenesulfonic acid was processed as described in Example 53A to provide the desired product.

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

Procedure: A mixture of 3,5-dichlorobenzamide (19.0 g) and methyl glyoxylate (8.8 g) in ethyl acetate (300 ml) was heated under reflux for 8 hours. The solvent was removed and the residual adduct was crystallised from chloroform-light petroleum. A portion (4.0 g) of the adduct was dissolved in a mixture of glacial acetic acid (30 ml) and acetonitrile (10 ml) with stirring, and then concentrated sulphuric acid (4 ml) was added. The mixture was kept at room temperature overnight when water (100 ml) was added. The precipitated solid was washed with water, dried, and crystallised from ethanol to give the product (2.45 g) as a colourless crystalline solid, m.p. 235°-237°. was heated under reflux for 8 hours The solvent was removed the residual adduct was crystallised from chloroform-light petroleum A portion (4.0 g) of the adduct was dissolved in a mixture of glacial acetic acid (30 ml) and acetonitrile (10 ml) concentrated sulphuric acid (4 ml) was added when water (100 ml) was added The precipitated solid was washed with water dried crystallised from ethanol

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: 3,5-Dichlorobenzamide, the product from Example 18A, benzotriazole, and p-toluenesulfonic acid were processed as described in Example 18B to provide the title compound.

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

Procedure: 3,5-Dichlorobenzamide, the product from Example 18A, benzotriazole, and p-toluenesulfonic acid were processed as described in Example 18B to provide the title compound.

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

Procedure: A suspension of 3,5-dichlorobenzamide, pivaldehyde, benzotriazole, and p-toluenesulfonic acid was processed as described in Example 1C to provide the title compound.

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

Procedure: A suspension of 3,5-dichlorobenzamide, 2,2-dichloropropionaldehyde, benzotriazole, and p-toluenesulfonic acid was processed as described in Example 53A to provide the desired product.