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Zur Dimerisierung von Indolizinen an Palladium-Kohle

✍ Scribed by Kreher, Thomas ;Sonnenschein, Helmut ;Schmidt, Lothar ;Hünig, Siegfried

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
411 KB
Volume
1994
Category
Article
ISSN
0947-3440

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✦ Synopsis

Dimerisation of Indolizines by Palladium Coal

Oxidative dimerisation of some indolizines by Pd/C in p‐xylene was undertaken in order to evaluate reaction conditions for cyclophane syntheses. Surprisingly, alkylation by the solvent occurred at the 3‐position of the indolizines 2 and 5 as a side reaction. In toluene, yields of alkylation products 4b and 8 exceeded those of dimerisation products 3 and 6. The alkylation by the solvent was fully suppressed by using chlorobenzene or chlorotoluene. Alkylation products of indolizines with p‐xylene or toluene and previously unknown dimeric indolizines are described.

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