N-[bis(diethoxyphosphoryl)methyl]cycloheptanamine

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

Procedure: 4.0 g of tetraethyl (cycloheptylamino)methylenebis(phosphonate) was dissolved in 40 ml of concentrated hydrochloric acid and heated under reflux for 2.5 hours. After cooling, the reaction solution was concentrated under reduced pressure to eliminate hydrochloric acid. Then, 30 ml of purified water was added to the residue and the mixture was again concentrated under reduced pressure. The oily product thus obtained was solidified by methanol and acetone and subject to the filtration. The residue was washed with acetone to give 2.5 g of (cycloheptylamino)methylenebis(phosphonic acid) as a white solid. heated under reflux for 2.5 hours After cooling the reaction solution was concentrated under reduced pressure Then, 30 ml of purified water was added to the residue the mixture was again concentrated under reduced pressure The oily product thus obtained subject to the filtration The residue was washed with acetone

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

Procedure: 4.0 g of tetraethyl (cycloheptylamino)methylenebis(phosphonate) was dissolved in 40 ml of concentrated hydrochloric acid and heated under reflux for 2.5 hours. After cooling, the reaction solution was concentrated under reduced pressure to eliminate hydrochloric acid. Then, 30 ml of purified water was added to the residue and the mixture was again concentrated under reduced pressure. The oily product thus obtained was solidified by methanol and acetone and subject to the filtration. The residue was washed with acetone to give 2.5 g of (cycloheptylamino)methylenebis(phosphonic acid) as a white solid. heated under reflux for 2.5 hours After cooling the reaction solution was concentrated under reduced pressure Then, 30 ml of purified water was added to the residue the mixture was again concentrated under reduced pressure The oily product thus obtained subject to the filtration The residue was washed with acetone

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

Procedure: 4.0 g of tetraethyl (cycloheptylamino)methylenebis(phosphonate) was dissolved in 40 ml of concentrated hydrochloric acid and heated under reflux for 2.5 hours. After cooling, the reaction solution was concentrated under reduced pressure to eliminate hydrochloric acid. Then, 30 ml of purified water was added to the residue and the mixture was again concentrated under reduced pressure. The oily product thus obtained was solidified by methanol and acetone and subject to the filtration. The residue was washed with acetone to give 2.5 g of (cycloheptylamino)methylenebis(phosphonic acid) as a white solid. heated under reflux for 2.5 hours After cooling the reaction solution was concentrated under reduced pressure Then, 30 ml of purified water was added to the residue the mixture was again concentrated under reduced pressure The oily product thus obtained subject to the filtration The residue was washed with acetone

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

Procedure: 4.0 g of tetraethyl (cycloheptylamino)methylenebis(phosphonate) was dissolved in 40 ml of concentrated hydrochloric acid and heated under reflux for 2.5 hours. After cooling, the reaction solution was concentrated under reduced pressure to eliminate hydrochloric acid. Then, 30 ml of purified water was added to the residue and the mixture was again concentrated under reduced pressure. The oily product thus obtained was solidified by methanol and acetone and subject to the filtration. The residue was washed with acetone to give 2.5 g of (cycloheptylamino)methylenebis(phosphonic acid) as a white solid. heated under reflux for 2.5 hours After cooling the reaction solution was concentrated under reduced pressure Then, 30 ml of purified water was added to the residue the mixture was again concentrated under reduced pressure The oily product thus obtained subject to the filtration The residue was washed with acetone

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

Procedure: 4.0 g of tetraethyl (cycloheptylamino)methylenebis(phosphonate) was dissolved in 40 ml of concentrated hydrochloric acid and heated under reflux for 2.5 hours. After cooling, the reaction solution was concentrated under reduced pressure to eliminate hydrochloric acid. Then, 30 ml of purified water was added to the residue and the mixture was again concentrated under reduced pressure. The oily product thus obtained was solidified by methanol and acetone and subject to the filtration. The residue was washed with acetone to give 2.5 g of (cycloheptylamino)methylenebis(phosphonic acid) as a white solid. heated under reflux for 2.5 hours After cooling the reaction solution was concentrated under reduced pressure Then, 30 ml of purified water was added to the residue the mixture was again concentrated under reduced pressure The oily product thus obtained subject to the filtration The residue was washed with acetone