Highly enantioselective photocyclization of 1-alkyl-2-pyridones to beta-lactams in inclusion crystals with optically active host compounds.
[reaction: see text] Upon photoirradiation of a 1:1 inclusion complex of (-)-3 and 2-alkyl-1-pyridone (1) (R = Et, n-Pr, i-Pr, n-Bu, i-Bu) in the solid state, optically active beta-lactams (2) of 91-99.5% ee were obtained in good yield.
Tanaka
Koichi
K
Department of Applied Chemistry, Faculty of Engineering, Ehime University, Matsuyama, Japan. tanaka@en3.ehime-u.ac.jp
Fujiwara
Takashi
T
Urbanczyk-Lipkowska
Zofia
Z