TY - JOUR
AU - Volbushko, N.
AB - Chemistry of Heterocyclic Compounds, Vol. 41, No. 7, 2005 PHOTOCONVERSIONS OF 1-ACETYL- 2,2,4-TRIMETHYL-[2H]-DIHYDROQUINOLINE B. S. Lukyanov, M. B. Lukyanova, and N. V. Volbushko Keywords: dihydroquinoline, photoreaction product, photochromism. The photochromic properties of [2H]-dihydroquinolines, observed earlier at -196°C [1], have not yet been studied in detail. We have observed that when a solution of 1-acetyl-2,2,4-trimethyl-[2H]-dihydroquinoline (1) [2] in dioxane is exposed to light with λ 313 nm at room temperature, its photocoloration occurs with max formation of a stable photoinduced form. To monitor the course of the process, we withdrew test samples from the solution and recorded their absorption spectra (Specord M-40). Irradiation was stopped within 12 h, after the optical density of the absorption band for the photoinduced form (λ 420 nm) stopped increasing and the max absorption band at λ 310 nm of the starting compound 1 disappeared. The photoreaction product was max successfully separated chromatographically into 2 fractions, which were identified by IR and H NMR spectroscopy. The H NMR spectrum was taken on a Varian Unity-300 (300 MHz), internal standard TMS. The first fraction, a colored (λ 420 nm) solid (mp 146-147°C), was identified as the open form max 1-acetyl-2,2,4-trimethyl-[2H]-dihydroquinoline (N-acetylacetone anil) 3. In the IR 
TI - Photoconversions of 1-Acetyl-2,2,4-trimethyl[2H]dihydroquinoline
JF - Chemistry of Heterocyclic Compounds
DO - 10.1007/s10593-005-0253-x
DA - 2005-10-20
UR - https://www.deepdyve.com/lp/springer-journals/photoconversions-of-1-acetyl-2-2-4-trimethyl-2h-dihydroquinoline-1CRPPY5hat
SP - 936
EP - 937
VL - 41
IS - 7
DP - DeepDyve
ER -