199982-70-2Relevant academic research and scientific papers
Formation and selective trapping of 2,5-dihydropyridine and its isopropylidene derivative by tungsten(0) alkylidene complexes. X-ray structure of the 5-isopropylidene-2,5-dihydropyridine adduct
Rudler, Henri,Martín-Vaca, Blanca,Nicolas, Muriel,Audouin, Max,Vaissermann, Jacqueline
, p. 361 - 366 (2008/10/08)
A mixture of 1,2- and 2,5-dihydropyridines and 5-isopropylidene-2,5-dihydropyridine, obtained from 1-(methoxycarbonyl)-1,2-dihydropyridine and methyllithium followed by protonation, reacts with a series of pentacarbonyl tungsten(0) alkoxycarbene complexes to afford, besides the expected pyridinium ylide complexes 7, the 2,5-dihydropyridinium ylide complexes 6 together with the 5-isopropylidene-2,5-dihydropyridinium ylide complexes 5, which could be separated and fully characterized by X-ray analysis.
Alkynyl-pyridinium ylid complexes of tungsten(0) and chromium(0): Synthesis and cascade insertion reactions
Martin-Vaca, Blanca,Rudler, Henri
, p. 3119 - 3121 (2007/10/03)
1,2-dihydropyridine reacts with (1-ethoxy-5-phenylpent-4-ynylidene)pentacarbonyltungsten(0) complex 7 to give the alkynyl pyridinium ylid complex 9 which upon thermolysis leads to an intermediate ketene as the result of the insertions of the triple bond a
