4-(dipropylamino)benzaldehyde

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

Procedure: Using 2.05 g (10.0 mmol) of p-di-n-propylaminobenzaldehyde, 3.6 g (10.9 mmol) of diethyl 3,3-diphenylallylphosphite ((5), R1=R2=H, R=Et), 1.3 g (11.6 mmol) of potassium tert-butoxide, and 15 ml of DMF, the same treatments as in step (5) in Example 1 were performed. Thus, 2.35 g of 1,1-diphenyl-4-(p-di-n-propylaminophenyl)-1,3-butadiene was obtained.

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

Procedure: Using 2.05 g (10.0 mmol) of p-di-n-propylaminobenzaldehyde, 3.6 g (10.9 mmol) of diethyl 3,3-diphenylallylphosphite ((5), R1=R2=H, R=Et), 1.3 g (11.6 mmol) of potassium tert-butoxide, and 15 ml of DMF, the same treatments as in step (5) in Example 1 were performed. Thus, 2.35 g of 1,1-diphenyl-4-(p-di-n-propylaminophenyl)-1,3-butadiene was obtained.

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

Procedure: 10 g of 2,2-dimethyl-3-phenyl-2H-azirine and 10 g of 4-dipropylaminobenzaldehyde were exposed to light in 2 liters of benzene under an atmosphere of argon for 40 minutes with a mercury high-pressure lamp of 2000 watt in a ring-mantle vessel through an interposed filter fluid. The filter fluid contained 35 g of cupric sulfate pentahydrate per liter of water and had a layer thickness of 1 cm. Not only the reaction solution but also the filter solution were cooled during the exposure to light in that they circulated with aid of pumps through a heat-exchanger positioned outside the photoreactor. During the exposure to light the temperature of the reaction solution amounted to 26° C. measured outside the photoreactor. Not only the reaction solution but also the filter solution were cooled during the exposure to light in that they amounted to 26° C.

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

Procedure: 10 g of 2,2-dimethyl-3-phenyl-2H-azirine and 10 g of 4-dipropylaminobenzaldehyde were exposed to light in 2 liters of benzene under an atmosphere of argon for 40 minutes with a mercury high-pressure lamp of 2000 watt in a ring-mantle vessel through an interposed filter fluid. The filter fluid contained 35 g of cupric sulfate pentahydrate per liter of water and had a layer thickness of 1 cm. Not only the reaction solution but also the filter solution were cooled during the exposure to light in that they circulated with aid of pumps through a heat-exchanger positioned outside the photoreactor. During the exposure to light the temperature of the reaction solution amounted to 26° C. measured outside the photoreactor. Not only the reaction solution but also the filter solution were cooled during the exposure to light in that they amounted to 26° C.

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

Procedure: Using 2.05 g (10.0 mmol) of p-di-n-propylaminobenzaldehyde, 3.6 g (10.9 mmol) of diethyl 3,3-diphenylallylphosphite ((5), R1 =R2 =H, R=Et), 1.3 g (11.6 mmol) of potassium tert-butoxide, and 15 ml of DMF, the same treatments as in step (5) in Example 1 were performed. Thus, 2.35 g of 1,1-diphenyl-4-(p-di-n-propylaminophenyl)-1,3-butadiene was obtained.

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

Procedure: Using 2.05 g (10.0 mmol) of p-di-n-propylaminobenzaldehyde, 3.6 g (10.9 mmol) of diethyl 3,3-diphenylallylphosphite ((5), R1 =R2 =H, R=Et), 1.3 g (11.6 mmol) of potassium tert-butoxide, and 15 ml of DMF, the same treatments as in step (5) in Example 1 were performed. Thus, 2.35 g of 1,1-diphenyl-4-(p-di-n-propylaminophenyl)-1,3-butadiene was obtained.

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

Procedure: Using 2.05 g (10.0 mmol) of p-di-n-propylaminobenzaldehyde, 3.6 g (10.9 mmol) of diethyl 3,3-diphenylallylphosphite ((5), R1=R2=H, R=Et), 1.3 g (11.6 mmol) of potassium tert-butoxide, and 15 ml of DMF, the same treatments as in step (5) in Example 1 were performed. Thus, 2.35 g of 1,1-diphenyl-4-(p-di-n-propylaminophenyl)-1,3-butadiene was obtained.