42797-37-5Relevant academic research and scientific papers
ORGANISCHE PHOTOCHEMIE XLIII. Diphenylphosphinigsaeure, Hetero- und Carbocyclen aus ortho-?-funktionalisierten Aroyl-Diphenylphosphinen durch UV-Bestrahlung in Loesung
Dankowski, Manfred,Praefcke, Klaus
, p. 131 - 140 (2007/10/02)
New aroyl diphenyl phosphines (1f-i) substituted with ?-functions in ortho-positions of the aroyl part have been synthesized and photolyzed in benzene.In two cases (1h and i) 1.2- and 1.4-addition products of photochemically formed diphenylphosphinous acid (3) with acetone or phenanthrene quinone (8) are isolated in 59percent yields.Moreover, in neighboring-group participations aroyl radicals formed by competing α-cleavages of 1g-i yield 5- and 6-membered hetero- and carbocycles: xanthone (6), 3,3'-dimethoxy 3,3'-diphthalidyl (7), or the phenanthrene derivative 9, respectively.
