Chemistry Letters p. 131 - 134 (1980)
Update date:2022-08-03
Topics:
Sugiyama, Toru
Tobita, Estuo
Takagi, Kyoko
Sato, Michitsugu
Kumagai, Yasuyuki
et al.
Photochemical substitution of ring hydrogen of pyridinecarboxylic esters by alkyl groups derived from solvent alcohols occurs in several paths: 1) alkylation initiated by excited carbonyl moiety of the ester group and 2) alkylation initiated by the excitation of the ?-electronic system of the pyridine ring.In the photoreaction of methyl 3-pyridinecarboxylate in acidic methanol, three types of excited state (two triplet states for alkylation and a singlet state for alkoxylation) contribute simultaneously.
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