Unsaturated Amines. II. Determination of the Proximity of Nitrogen to a Double Bond by Ultraviolet Absorption Spectra¹

The Synthesis and Properties of Some Simple 1,4-Dihydropyridines

“…4,4-Dimethyl-l-phenylpiperidine (10) and 3,3-Dimethyl-5-phenylaminopentanol-l (11).-A solution of the imide (25 g., 0.115 mole) in 160 ml. of tetrahydrofuran was added over 1.5 hr.…”

“…as due to the successful competition of a ringopening reaction with further attack of hydride on the first product of reduction. The piperidine, (10), also was produced on hydrogenation of 4, while the other piperidines produced by reduction were characterized by elemental analysis, either as the free base or as the picrate.…”

Kinetics and thermodynamics of intermolecular saturated amine excimers

“…40 °C, which has been denoted above as '. The mathematical (kinetic) requirements for this situation are Amp » Ap and AdmC » Am to which Ware et al25 add the condition Amd 4" AdmC » [2(Amd -AdmC)(Ad -AM)]1/2 Equation 16 can also be expressed as (7fe)oC = ^l^ ( 17) -Ad where (Ke)o is the molar equilibrium constant pertaining to excimer formation. Accordingly, an Arrhenius plot of the right-hand-side of ( 17) can be used to determine AH°and AS10, assuming that both Am and Ad are temperature independent.…”

Ultraviolet Spectra of Alkaloids

“…A point of some interest is that sparteine (XXXVI) and its cis-cis isomer a-isosparteine both show a maximum above 200 µ. In ether, sparteine has a maximum at 214 µ (log e 3.71) and -isosparteine shows a band at 216 µ (log e 3.79) (225).…”