4-Piperidinone, 2,2,6,6-tetramethyl

Piperidin-4-one N-oxide, 2,2,6,6-tetramethyl-solvent effects, 2, 146 Piperidinones stability, 2, 159-161 synthesis, 2, 81, 95 from S-aminopentanoic acids, 2, 402 Piperidin-2-ones IR spectroscopy, 2, 130 synthesis... 

Tetramethyl-4-piperidinone-1-oxyl free radical (66) Chair 340)... 

Benzoylethyl)-2,2,6,6-tetramethyl-4-piperidinone (69) with ammonium ion gave 5,5,7,7-tetramethyl-2-phenyl-5,6,7,8-tetrahydro- 1,6-naphthyridine (70) (substrate. HC1, NH4C1, EtOH, reflux, 4h 77%) analogs likewise.933,1351... 

Primary amines form Schiff bases, (CH )2C=NR. Ammonia induces an aldol condensation followed by 1,4-addition of ammonia to produce diacetone amine (from mesityl oxide), 4-amino-4-methyl-2-pentanone [625-04-7], (CH3)2C(NH2)CH2COCH3, and triacetone amine (from phorone), 2,2,6,6-tetramethyl-4-piperidinone [826-36-8]. Hydroxylamine forms the oxime and hydrazine compounds (RNHNHJ form hydrazones (RNHN=C(CH3)2). Acetone and nitrous acid give the isonitroso compound which is the monoxime of pymvaldehyde [306-44-5], CH COCH=NOH. 

C9H15N3O3, 1,3,5-Triacetyl-2,4,6-hexahydro-s-triazine, 41B, 279 C9H15N3O6, 1,3,5-Triacetoxyhexahydro-1,3,5-triazine, 43B, 297 C9HigN02r 2,2,6,6-Tetramethyl-4-piperidinone-1-oxyl nitroxide (orthorhombic), 38B, 262 40B, 227 C9H16NO2 f 2,2,6,6-Tetramethyl-4-piperidone-1-oxyl (gas-ed), 40B,... 

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