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Reactivity of Pyrrole Pigments, VIII. Preparation of 5(2H)-Dipyrrylmethanones from 5(1H)-Pyrromethenones by Reduction with Sodium Dithionite

✍ Scribed by Farrera, Joan A. ;Ribó, Josep M. ;Serra, Xavier ;Trull, Francesc R.


Publisher
John Wiley and Sons
Year
1986
Tongue
English
Weight
448 KB
Volume
1986
Category
Article
ISSN
0947-3440

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✦ Synopsis


Pyrromethenones 3 have been reduced with sodium dithionite to give 5(2H)-dipyrrylmethanones 4 in very good yields. Some ofthe conditions to optimize this reduction have been studied.

Reaktivitat von

Pyrrolpigmenten, VlII'). -Darstellung von 5(2H)-Dipyrrylmethanonen aus S(1H)-Pyrromethenonen durch Reduktion mit Natriumdithionit 5(1H)-Pyrromethenone 3 konnen mit Na2S204 in sehr guten Ausbeuten zu 5(2H)-Dipyrrylmethanonen 4 reduziert werden. Einige Reaktionsbedingungen wurden optimiert.


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