Dimethyl piperidine

A kinetic study of the mercuric acetate oxidation of l-alkyl-3,5-dimethyl-piperidines (81) and 3-alkyl-3-azabicyclo[3.3.1]nonanes (82) was made to evaluate the effect of the N-alkyl group on the rate of oxidation and to contrast these two ring systems (70). The maximum factor in the piperidine... 

Conversely, it can be seen on Fig. 1, that chemisorption of thiophenol (C6H5SH) at room temperature does not involve ail the surface Ni atoms. This behavior has already been obsen/ed for another similar molecule, benzene the fraction of occupied Ni surface atoms at room temperature was ca. 0.65 over a 4.2 % Al Ni Raney pretreated in vacuo at 250°C (ref. 13). This kind of study has been extended to a series of poisons such as thiophene (ref. 14), ammonia (ref. 15), piperidine, pyridine and 3.5 dimethyl piperidine (ref. 16). which also lead to a non-corrosive chemisorption, involving only a fraction of surface atoms. It has also been shown (ref. 14) that after poison saturation, the free Ni atoms are accessible to H2 chemisorption but not to large molecules such as benzene. In contrast, COS and CS2 chemisorptions at room temperature are corrosive as for the case for H2S chemisorption (ref. 14). 

Bases Alumina, see p-Toluenesulfonylhydrazine. Dehydroabietylamine. 1,5-Diazabicyclo [4.3.0]nonene-5. 1,4-Diazabicyclo[2.2.2]octane. l,S-Diazabicyclot5.4.0]undecene-5. 2,6-Di-/-butylpyridine. N,N,-Diethylglycine ethyl ester, see /-Amyl chloroformate. 2,6-Dimethyl-piperidine. Ethanolamine. Lithium diisopropylamide, see Diphenylsulfonium isopropylide. Lithium nitride. Magnesium methoxide. N-Methylmorpholine. Piperidine. Potassium amide. Potassium hydroxide. Potassium triethylmethoxide. Pyridine. Pyrrolidine. Sodium methoxide. Sodium 2-methyl-2-butoxide. Sodium thiophenoxide. Thallous ethoxide. Triethyla-mine. Triphenylphosphine, see l-Methyl-2-pyrrolidone. 

Resin acids 2-Amino-2-mcthyl-l.3-propanediol. 2,6-Dimethyl-piperidine. Ethanolamine. Piperidene. 

MethyI-2-pyridon liefert mit Raney-Nickel in Methanol (200—2407120 bar) in 80%-iger Ausbeute 3-Methyl-2-piperidon bei 280° treten zusatzlich Hydrogenolyse und N-Alkylierung ein, so daB 3-Methyl- und 1,3-Dimethyl-piperidin erhalten werden15. 

Lambert still insists that NH is preferentially axial in piperidine, and that chemical-shift differences between adjacent geminal protons can give information about the conformational equilibrium on nitrogen. Thus, because the geminal C-6 chemical-shift difference is greater in 3,3-dimethyl-piperidine than in piperidine he claims that there is less axial N-H, consistent with repulsions between axial 3-methyl and axial N-H. This paper also reports barriers to ring inversion in 3,3-dimethyl- and 1,3,3- and 1,4,4-trimethyl-piperidines. 

Triethanolamine, Triiso-propanolamine p-Diethylaminoethanol Pyrrolidine Piperidine, N-Ethyl-Dialkyl-, Dimethyl-, piperidine, N-Methyl-, N-Phenyl-morpholine Aniline, Benzidine Diethyl-aniline 1,4-Dihydropyridines Pyridine, Lutidine, Collidine, Quinoline Brucine... 

Hydroxymethylsi des Kethylester-benzoats der a-[4-Oxy.l.4.dimethyl-piperidin.oarbonsaiire.(3 ] 22 U147. 

Benzoyloxy.2.6 dimethyl.piperidin carboiu ure.(3).methyle8t 88 II148. 

Example trans 1,2-dimethyl piperidine hydrochloride (in CHCl ) 6 = -325.6 ppm... 

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