Effects of piperidine
and piperideine alkaloids from the venom of red imported fire ants, Solenopsis invicta Buren, on Pythium ultimum Trow growth in vitro and the application of piperideine alkaloids to control cucumber damping-off in the greenhouse.
The larvicidal amides piperidine
, pipernonaline, piperoctadecalidine, pellitorine, guineensine, pipercide, and retrofractaminde had previously been isolated from this species.
In this stage, 4-t-butyl-2-(N-piperdinomethyl)cyclohexanone was produced from 4- t-butyl-cyclohexanone, piperidine
and paraformaldehyde according to reference one.
In petri dish experiments, more than 90 percent of sporangia failed to germinate when exposed to piperideine or piperidine
concentrations of 51.
Reaction of 1 with ethyl cyanoacetate in the presence of catalytic amount of piperidine
furnished the chromene derivative (12), while its reaction with ethyl cyanoacetate in the presence of ammonium acetate gave the quinoline derivative (13).
This method had been employed for the addition of both azido [52, 62, 63] and alkyne functionalities to the BODIPY core in reactions catalyzed by acetic acid and piperidine
While the addition of piperidine
in the solution causes hypochromic effect along with red shifting was observed (~10 nm).
Morpholine undergoes most chemical reactions typical for other secondary amines, though the presence of the ether oxygen withdraws electron density from the nitrogen, rendering it less nucleophilic (and less basic) than structurally similar secondary amines such as piperidine
The poison hemlock plant (Conium maculatum) contains several toxic piperidine
alkaloids, primarily coniine, and has been used since antiquity as an intentional poison--most notably by the Athenians to execute Socrates.
The structure of methadone, unlike morphine, pethidine and fentanyl, lacks a piperidine
ring, but like each of these compounds, it retains a phenylpropylamine structure (Figure 1) and some morphine-like conformers of l-methadone (the active isomer) have been proposed.
Chemical studies carried out on Brazilian Piperaceae species have revealed the occurrence of pyrones, lignoids and chromenes besides various amides bearing isobutyl, pyrrolidine, dihydropyridone and piperidine
moieties (Parmar et al.
Other species of Cassia spectabilis demonstrated CNS-selective noncompetitive cholinesterase inhibition which was related to the piperidine
alkaloid (-)-spectaline isolated from the Cassia spectabilis (Castro et al.