Water → HCID 14570270, compound

Participants

Reaction Steps

To a solution of 1'-methylxanthene-9-spiro-4'-piperidine (1.3 g.) in hexane (25 ml.) in an argon atmosphere is added a 1.6 molar solution of t-butyl lithium in pentane (3.5 ml.) with stirring at room temperature. The mixture is stirred for 1 hour at room temperature. Hydroxylamine methyl ether (0.4 g.) in hexane (5 ml.) is added dropwise during 5 minutes. Water is added and the organic layer separated, washed with water and dried with MgSO4. The solvent is evaporated to give a solid residue, which is recrystallised from hexane to give 1'-methyl-4-aminoxanthene-9-spiro-4'-piperidine, m.p. 173°-174° C. The above process is repeated using an equivalent amount of sulphur and paraformaldehyde as starting material in place of hydroxylamine methyl ether. The following compounds are thus prepared:

Provenance & Evidence