Intramolecular photochemical hydrogen abstraction in 2-alkylpyrazines and 2-alkylpyridines

A Mukherjee, SAM Duggan…

Index: Mukherjee, Ashis; Duggan, Sandhya A. M.; Agosta, William C. Journal of Organic Chemistry, 1994 , vol. 59, # 1 p. 178 - 181

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Citation Number: 8

Abstract

Photochemical hydrogen abstraction in 2-alkylpyrazinea 6-8 and 2-alkylpyridines 9-1 1 proceeds analogously to the process of eq 1. Hydroxylic solvent causes quantum yields for pyrazine fragmentation products (ap) to increase about 1 order of magnitude. Pyridine fragmentation takes place from both singlet and triplet states. Pyrazine fragmentations follow Stem-Volmer kinetics with modest bond strength selectivity (1: 30-1: 17 for Sa and Sc). ...

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