ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Skeletal Rearrangements under Electron Impact, VI. Studies on the Alkyl- and Hydrogenmigration in Diphenic Acid Derivatives, III4)On electron impact derivatives of biphenyl with alkoxy substituents in 2- and 6-position show cleavage of the central C-C-bridge. Thereby formally an alkylene group is transferred from the eliminated radical to the resulting fragment ion. In the case of methyl 6.2'.6'-trimethoxybiphenyl-2-carboxylate the rearrangement ion forms the base peak. Derivatives with only one ortho substituent in both rings also exhibit the rearrangement, here the 2'-methoxy-biphenyl-2-carboxylic acid displays the most abundant rearrangement ion.
Notes:
Bei Biphenylderivaten mit Alkoxysubstituenten ortho-stĂ€ndig zur Biphenylbindung wird unter ElektronenbeschuĂ die zentrale C-C-BrĂŒcke gespalten. Dabei ĂŒbertrĂ€gt das eliminierte Radikal formal einen Alkylenrest auf das entstehende Fragmention. Im Falle des 6.2'.6'-Trimethoxy-biphenyl-carbonsĂ€ure-(2)-methylesters bildet dieses Umlagerungsion den stĂ€rksten Peak ĂŒberhaupt. Auch bei lediglich zwei ortho-stĂ€ndigen Resten findet die Umlagerung statt, wobei die 2'-Methoxy-biphenyl-carbonsĂ€ure-(2) die höchste IntensitĂ€t aufzuweisen hat.
Additional Material:
10 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19721050124
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