The Chemistry ofN-Substituted Benzotriazoles; Part II.1The Preparation of Tertiary Amines Containing Tertiary-Alkyl Groups from Ketones, Secondary Amines, and Organometallic Reagents
Reaction of alkoxycarbene complexes of tungsten with 1,2-dihydroquinoline: single vs. double hydride transfers to the carbene–carbon: synthesis, X-ray structure and reactivity of a quinolinium ylide complex of tungsten pentacarbonyl
dihydropyridine, 1,2-dihydroquinoline (2), reacts with carbene complex of tungsten (CO)5W(OEt)Ph (3) to give the expected quinolinium complex 4, fully characterized by an X-ray structure. By contrast, under the same conditions complex 7 (CO)5W(OEt)Me led to the alkyltungstate 15 as the result of a double hydride transfer to the carbene–carbon. Complex 15 could be trapped by the enamine of morpholine and cyclohexanone