(4aR,7aS)-6-benzyl-1,2,3,4,4a,7a-hexahydropyrrolo[3,4-b]pyridine-5,7-dione

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

Procedure: 4.8 g (10 mmol) of cis-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane (racemate) and 2.36 g (5 mmol) of (1S)-camphorsulfonic acid are dissolved in 20 ml of acetonitrile under reflux to give a clear solution and cooled to room temperature. The precipitated solid is filtered off with suction and dried in vacuo to give 1.0 g under reflux to give a clear solution The precipitated solid is filtered off with suction dried in vacuo to give 1.0 g

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

Procedure: 0.52 g (2.12 mmol) of cis-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane (racemate) and 0.49 g (2.12 mmol) of (1S)-camphor sulfonic acid are dissolved in 5 ml of acetonitrile under reflux to give a clear solution and cooled to room temperature. The precipitated solid is filtered off with suction and dried in vacuo to give 0.11 g (0.49 mmol) of (1R,6S)-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane-(1S)-camphorsulfonic acid salt. under reflux to give a clear solution The precipitated solid is filtered off with suction dried in vacuo

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

Procedure: 0.53 g (2.18 mmol) of cis-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane (racemate) and 0.51 g (2.18 mmol) of (1S)-camphorsulfonic acid are dissolved in 30 ml of acetone under reflux to give a clear solution and cooled to room temperature. The precipitated solid is filtered off with suction and dried in vacuo to give 0.23 g (0.49 mmol) of (1R,6S)-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane-(1S)-camphorsulfonic acid salt. under reflux to give a clear solution The precipitated solid is filtered off with suction dried in vacuo

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

Procedure: 4.8 g (10 mmol) of cis-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane (racemate) and 2.36 g (5 mmol) of (1S)-camphorsulfonic acid are dissolved in 20 ml of acetonitrile under reflux to give a clear solution and cooled to room temperature. The precipitated solid is filtered off with suction and dried in vacuo to give 1.0 g under reflux to give a clear solution The precipitated solid is filtered off with suction dried in vacuo to give 1.0 g

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

Procedure: 4.8 g (10 mmol) of cis-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane (racemate) and 2.36 g (5 mmol) of (1S)-camphorsulfonic acid are dissolved in 20 ml of acetonitrile under reflux to give a clear solution and cooled to room temperature. The precipitated solid is filtered off with suction and dried in vacuo to give 1.0 g under reflux to give a clear solution The precipitated solid is filtered off with suction dried in vacuo to give 1.0 g

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

Procedure: 0.52 g (2.12 mmol) of cis-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane (racemate) and 0.49 g (2.12 mmol) of (1S)-camphor sulfonic acid are dissolved in 5 ml of acetonitrile under reflux to give a clear solution and cooled to room temperature. The precipitated solid is filtered off with suction and dried in vacuo to give 0.11 g (0.49 mmol) of (1R,6S)-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane-(1S)-camphorsulfonic acid salt. under reflux to give a clear solution The precipitated solid is filtered off with suction dried in vacuo

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

Procedure: 0.53 g (2.18 mmol) of cis-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane (racemate) and 0.51 g (2.18 mmol) of (1S)-camphorsulfonic acid are dissolved in 30 ml of acetone under reflux to give a clear solution and cooled to room temperature. The precipitated solid is filtered off with suction and dried in vacuo to give 0.23 g (0.49 mmol) of (1R,6S)-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane-(1S)-camphorsulfonic acid salt. under reflux to give a clear solution The precipitated solid is filtered off with suction dried in vacuo

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

Procedure: 4.8 g (10 mmol) of cis-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane (racemate) and 2.36 g (5 mmol) of (1S)-camphorsulfonic acid are dissolved in 20 ml of acetonitrile under reflux to give a clear solution and cooled to room temperature. The precipitated solid is filtered off with suction and dried in vacuo to give 1.0 g under reflux to give a clear solution The precipitated solid is filtered off with suction dried in vacuo to give 1.0 g

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

Procedure: 0.52 g (2.12 mmol) of cis-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane (racemate) and 0.49 g (2.12 mmol) of (1S)-camphor sulfonic acid are dissolved in 5 ml of acetonitrile under reflux to give a clear solution and cooled to room temperature. The precipitated solid is filtered off with suction and dried in vacuo to give 0.11 g (0.49 mmol) of (1R,6S)-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane-(1S)-camphorsulfonic acid salt. under reflux to give a clear solution The precipitated solid is filtered off with suction dried in vacuo

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

Procedure: 0.53 g (2.18 mmol) of cis-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane (racemate) and 0.51 g (2.18 mmol) of (1S)-camphorsulfonic acid are dissolved in 30 ml of acetone under reflux to give a clear solution and cooled to room temperature. The precipitated solid is filtered off with suction and dried in vacuo to give 0.23 g (0.49 mmol) of (1R,6S)-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane-(1S)-camphorsulfonic acid salt. under reflux to give a clear solution The precipitated solid is filtered off with suction dried in vacuo