1-(2-丙炔)哌啶 、 2-碘代甲苯 在
dichloro bis(triphenylphosphino)palladium(II) 、 碘化亚铜水 、 magnesium sulfate 作用下,
以
二乙胺 为溶剂,
反应 5.0h,
以gave 3.98 g of an oil of boiling point 96–98° C./0.08 mm Hg的产率得到1-(3-o-Tolyl-2-propynyl)piperidine
Copper-catalyzed Mannichreactions of terminal alkynes and secondary amines with aqueous formaldehyde can be accelerated by the use of a catalytic amount of an imidazole ligand carrying a long alkyl chain. The alkyl chain shows an efficient steric effect and helps the reaction. This imidazole ligand is efficient for various substrates, including even bulky alkynes.
The present invention relates to the use of substituted aryl- and heteroarylpropargylamines of the formula (I)
1
where
a) R
1
is heteroaryl or aryl, unsubstituted or mono- or polysubstituted by identical or different radicals,
b) A is a group CR
4
R
5
or C═O, where
R
4
is hydrogen, halogen or alkyl;
R
5
is hydrogen, halogen or a substituted or unsubstituted hydrocarbon radical;
c) R
2
and R
3
together with the nitrogen atom to which they are attached form N-heteroaryl or N-heterocyclyl, unsubstituted or mono- or polysubstituted by identical or different radicals,
if appropriate also as N-oxide or salt, as pesticide against arthropods and helminths for protecting plants and animals.