Results 141 to 150 of about 5,688 (181)

Flow Update for a Cossy Photocyclization

Organic Letters, 2016
A Cossy 5-exo-dig photocyclization of organohalides (X = Br, I) onto a C-C triple bond was studied using a flow photomicroreactor, which proceeded in a minute order of residence time. A deuterium labeling study supported the nonchain radical mechanism proposed by the Cossy group, in which a hydrogen source originates from a triethylamine cation radical.
Takahide, Fukuyama, Yuki, Fujita, Muhammad Abid, Rashid, Ilhyong, Ryu   +3 more
openaire   +2 more sources

The photocyclization of a hydrazone to an indazole

Journal of Photochemistry, 1987
UV irradiation of thin films of p-diethylaminobenzaldehyde diphenyl-hydrazone (1) produces 1-phenyl-3-(4-diethylamino-1-phenyl)-1,3-indazole (2) as the major photoproduct. A proposed mechanism for the reaction, which involves a photocyclization followed by an oxidation, is similar to the photocyclization of diphenylamine to carbazole and stilbene to ...
J. Pacansky, H.C. Coufal, D.W. Brown
openaire   +1 more source

Photocyclization of a heliangolide - a cyclodecadienone

Tetrahedron Letters, 1983
Abstract Irradiation of the dienone 1 furnishes essentially a single tricyclic product 2 containing cyclobutane ring. The corresponding epoxide 5 furnishes tagitinin F 6 - an antileukemic compound.
P.K. Chowdhury, R.P. Sharma, J.N. Baruah
openaire   +1 more source

ChemInform Abstract: PHOTOCYCLIZATION OF ENAMIDES. PART 23. REDUCTIVE PHOTOCYCLIZATION OF ENAMIDES

Chemischer Informationsdienst, 1985
AbstractDie Anwendung der Titelreaktion auf das Enamid (I) ergibt in Ether ein Gemisch der Diene (III)‐(V) sowie deren thermisches Aromatisierungsprodukt (VI), während man in Acetonitril nur (V) erhält; durch den Einsatz deuterierter Reagentien läßt sich ableiten, daß die Cyclisierung über die Zwischenstufe (II) verlaufen muß.
T. NAITO, Y. TADA, Y. NISHIGUCHI, I. NINOMIYA   +3 more
openaire   +1 more source

Photoreductions and Photocyclizations of Tryptophan

Journal of the American Chemical Society, 1966
O, Yonemitsu, P, Cerutti, B, Witkop
openaire   +2 more sources

Photocyclization

2010
C.-S. Chang, Y.-T. Wu
openaire   +1 more source

Photocyclization of acrylanilides

The Journal of Organic Chemistry, 1971
Yoshiro Ogata, Katsuhiko Takagi, Iwao Ishino   +2 more
openaire   +1 more source

Photocyclization of Enamides. 38. Reductive Photocyclization of a-(Methylthio)- and a-(Arylthio)enamides

HETEROCYCLES, 1993
Takeaki Naito, Hiromi Tanada, Yumiko Suzuki, Haruko Saito, Toshiko Kiguchi, Ichiya Ninomiya   +5 more
openaire   +1 more source

Bacteriorhodopsin photocycle kinetics analyzed by the maximum entropy method

Journal of Photochemistry and Photobiology B: Biology, 2004
E Papp
exaly   +2 more sources

Directed Manipulation of a Flavoprotein Photocycle

Angewandte Chemie International Edition, 2013
Staudt, H., Hoesl, M., Dreuw, A., Serdjukow, S., Oesterhelt, D., Budisa, N., Wachtveitl, J., Grininger, M.   +7 more
openaire   +3 more sources