piperidine-4,4-diol

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

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

Procedure: 4.7 mL 33% HBr in acetic acid, 11.4 g bromine in 30 mL acetic acid was added slowly to a stirred solution of 10 g piperidine-4,4-diol in 60 mL acetic acid at RT. The reaction mixture was stirred additional 45 min at ambient temperature and the acetic acid was completely removed under reduced pressure. The residue was dissolved in 200 mL acetone and refluxed for 1 hour, cooled, filtered and washed with acetone and dried to give 15.2 g of the desired product the acetic acid was completely removed under reduced pressure The residue was dissolved in 200 mL acetone refluxed for 1 hour cooled filtered washed with acetone dried

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

Procedure: 4.7 mL 33% HBr in acetic acid, 11.4 g bromine in 30 mL acetic acid was added slowly to a stirred solution of 10 g piperidine-4,4-diol in 60 mL acetic acid at RT. The reaction mixture was stirred additional 45 min at ambient temperature and the acetic acid was completely removed under reduced pressure. The residue was dissolved in 200 mL acetone and refluxed for 1 hour, cooled, filtered and washed with acetone and dried to give 15.2 g of the desired product the acetic acid was completely removed under reduced pressure The residue was dissolved in 200 mL acetone refluxed for 1 hour cooled filtered washed with acetone dried

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

Procedure: 4.7 mL 33% HBr in acetic acid, 11.4 g bromine in 30 mL acetic acid was added slowly to a stirred solution of 10 g piperidine-4,4-diol in 60 mL acetic acid at RT. The reaction mixture was stirred additional 45 min at ambient temperature and the acetic acid was completely removed under reduced pressure. The residue was dissolved in 200 mL acetone and refluxed for 1 hour, cooled, filtered and washed with acetone and dried to give 15.2 g of the desired product the acetic acid was completely removed under reduced pressure The residue was dissolved in 200 mL acetone refluxed for 1 hour cooled filtered washed with acetone dried

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

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

Procedure: The experimental protocol used is described in the literature (Eur. J. Med. Chem. (1987) 22, 33-43), starting from 5-methoxy-1H-indole and 4,4-piperidinediol.

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

Procedure: The experimental protocol used is described in the literature (Eur. J. Med. Chem. (1987) 22, 33-43), starting from 5-methoxy-1H-indole and 4,4-piperidinediol.

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

Procedure: 4.7 mL 33% HBr in acetic acid, 11.4 g bromine in 30 mL acetic acid was added slowly to a stirred solution of 10 g piperidine-4,4-diol in 60 mL acetic acid at RT. The reaction mixture was stirred additional 45 min at ambient temperature and the acetic acid was completely removed under reduced pressure. The residue was dissolved in 200 mL acetone and refluxed for 1 hour, cooled, filtered and washed with acetone and dried to give 15.2 g of the desired product the acetic acid was completely removed under reduced pressure The residue was dissolved in 200 mL acetone refluxed for 1 hour cooled filtered washed with acetone dried