1-benzoxepine-3,5-dione

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

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

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

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

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

Procedure: Dimethylamine is introduced while stirring into a boiling solution of 52.8 g (0.3 mole) 2,3,4,5-tetrahydro-1-benzoxepin-3,5-dione and a spatula tip of p-toluene sulfonic acid in 225 ml toluene. The water of reaction is separated by a water separator. After the reaction has ended, the solution is concentrated, the remaining residue is filtered under suction and recrystallized from chloroform/ether. 42 g (69% of the theoretical yield) of 3-dimethylamino-1-benzoxepin-5(2H)-one are obtained. This compound displays a melting point of 136°-136° C. is separated by a water separator the solution is concentrated the remaining residue is filtered under suction recrystallized from chloroform/ether

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

Procedure: A solution of 17.6 g (0.1 mole) 2,3,4,5-tetrahydro-1-benzoxepin-3,5-dione and a spatula tip of p-toluene sulfonic acid in 200 ml dichloromethane are mixed while stirring with 6 g (0.1 mole) isopropylamine and subsequently stirred to the end of the reaction at room temperature. After concentration of the solution a product is obtained by filtering off under suction and by recrystallizing from butylacetate. 13.5 g (62% of the theoretical yield) of 3-isopropylamino-1-benzoxepin-5(2H)-one are obtained. After concentration of the solution a product is obtained by filtering off under suction by recrystallizing from butylacetate

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

Procedure: Dimethylamine is introduced while stirring into a boiling solution of 52.8 g (0.3 mole) 2,3,4,5-tetrahydro-1-benzoxepin-3,5-dione and a spatula tip of p-toluene sulfonic acid in 225 ml toluene. The water of reaction is separated by a water separator. After the reaction has ended, the solution is concentrated, the remaining residue is filtered under suction and recrystallized from chloroform/ether. 42 g (69% of the theoretical yield) of 3-dimethylamino-1-benzoxepin-5(2H)-one are obtained. This compound displays a melting point of 136-136° C. is separated by a water separator the solution is concentrated the remaining residue is filtered under suction recrystallized from chloroform/ether

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

Procedure: A solution of 17.6 g (0.1 mole) 2,3,4,5-tetrahydro-1-benzoxepin-3,5-dione and a spatula tip of p-toluene sulfonic acid in 200 ml dichloromethane are mixed while stirring with 6 g (0.1 mole) isopropylamine and subsequently stirred to the end of the reaction at room temperature. After concentration of the solution a product is obtained by filtering off under suction and by recrystallizing from butylacetate. 13.5 g (62% of the theoretical yield) of 3-isopropylamino-1-benzoxepin-5(2H)-one are obtained. After concentration of the solution a product is obtained by filtering off under suction by recrystallizing from butylacetate

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

Procedure: A solution of 88 g (0.5 mole) 2,3,4,5-tetrahydro-1-benzoxepin-3,5-dione and a spatula tip of p-toluene sulfonic acid in 750 ml toluene are mixed while stirring with 44 g (0.5 mole) N,N-dimethylethylenediamine and subsequently stirred to the end of the reaction at room temperature. After concentration of the solution, a product is obtained by filtering off the solution under suction and subsequently recrystallizing from benzene/ligroin. 108 g (88% of the theoretical yield) of 3-(β-dimethylaminoethylamino)-1-benzoxepin-5(2H)-one are obtained. The melting point of this derivative is 100 to 101° C. After concentration of the solution, a product is obtained by filtering off the solution under suction subsequently recrystallizing from benzene/ligroin