74357-21-4Relevant academic research and scientific papers
A novel photochemical reaction of 2-alkoxynicotinates to cage-type photodimers
Sakamoto, Masami,Yagi, Tadao,Fujita, Shohei,Mino, Takashi,Karatsu, Takashi,Fujita, Tsutomu
, p. 1843 - 1847 (2002)
Irradiation of a benzene solution of 2-alkoxynicotinic acid alkyl esters gave cage-type photodimers in good yields, the structure of which was established by X-ray single-crystal analysis. The maximum quantum yield was 8.0 × 10-2 when a 5.0 M (almost neat) solution was used. Photolysis of phenyl 2-methoxynicotinate promoted photo-Fries rearrangement to give 1,3- and 1,5-rearranged products. Excimer emission of methyl 2-methoxynicotinate was observed at 77 K.
MULTIPLE PATHS FOR PHOTOALKYLATION OF PYRIDINECARBOXYLIC ESTERS IN ALCOHOLS
Sugiyama, Toru,Tobita, Estuo,Takagi, Kyoko,Sato, Michitsugu,Kumagai, Yasuyuki,et al.
, p. 131 - 134 (2007/10/02)
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.
