5-diethoxyphosphorylimidazolidine-2,4-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:

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

Procedure: Prepared from diethyl 2,4-dioxoimidazolidine-5-phosphonate and 2-nitro-5-[3-(N-methyl-N-cyclohexylcarbamoyl)-1-piperidinyl]benzaldehyde analogous to the procedure of Example (2-1), m.p. 153°-162° C., crystallized from MeOH-H2O. crystallized from MeOH-H2O

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

Procedure: Prepared from diethyl 2,4-dioxoimidazolidine-5-phosphonate and 2-nitro-5-[3-(N-methyl-N-cyclohexylcarbamoyl)-1-piperidinyl]benzaldehyde analogous to the procedure of Example (2-1), m.p. 153°-162° C., crystallized from MeOH-H2O. crystallized from MeOH-H2O

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

Procedure: Prepared from diethyl 2,4-dioxoimidazolidine-5-phosphonate and 2-nitro-5-(4-ethoxycarbonyl-1-piperidinyl)benzaldehyde analogous to the procedure of Example (2-1), m.p. 221°-223° C., crystallized from MeOH. crystallized from MeOH

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

Procedure: Prepared from diethyl 2,4-dioxoimidazolidine-5-phosphonate and 2-nitro-5-(4-ethoxycarbonyl-1-piperidinyl)benzaldehyde analogous to the procedure of Example (2-1), m.p. 221°-223° C., crystallized from MeOH. crystallized from MeOH

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

Procedure: Prepared from diethyl 2,4-dioxoimidazolidine-5-phosphonate and 2-nitro-5-(1-pyrrolidinyl)benzaldehyde analogous to the procedure of Example (2-1), m.p. 289° C. (dec.), crystallized from DMF-H2O. crystallized from DMF-H2O

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

Procedure: Prepared from diethyl 2,4-dioxoimidazolidine-5-phosphonate and 2-nitro-5-(1-pyrrolidinyl)benzaldehyde analogous to the procedure of Example (2-1), m.p. 289° C. (dec.), crystallized from DMF-H2O. crystallized from DMF-H2O

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

Procedure: Sodium (0.6 g, 0.026 g atom) was dissolved in absolute ethanol (200 mL) and diethyl 2,4-dioxoimidazolidine-5-phosphonate (6.0 g, 25 mmol) added. After 10 minutes, 2-nitro-5-(1-piperidinyl)benzaldehyde (5.0 g, 21 mmol) was added in one portion and the mixture stirred at room temperature for 5 hours. The yellow precipitate was filtered off, washed with water and dried in air to give 5-[[2-nitro-5-(1-piperidinyl)phenyl]methylene]-2,4-imidazolidinedione (6.17 g, 92%), m.p. 273°-276° C. A sample dried in vacuo in 110° C. had m.p. 280° C. (dec.). The yellow precipitate was filtered off washed with water dried in air