Stéréosélectivité de l'addition de réactifs nucléophiles sur des cétones polycycliques à jonction trans
作者:D. Calmes、L. Gorrichon-Guigon、P. Maroni、A. Accary、R. Barret、J. Huet
DOI:10.1016/s0040-4020(01)97654-9
日期:1981.1
The nucleophilic additions of hindered organometallic compounds to polycyclic ketones with trans ring junctions involve predominant axial attack when flattening of the ring containing the carbonyl group occurs. The influence of nucleophile structure (O-Por C-metallated character) on equatorial or axial attack is discussed.
Photochemical and photophysical studies of bicyclo[4.3.0]non-1(6)-en-2-one
作者:David I. Schuster、Jan Woning、Nikolas A. Kaprinidis、Yanping Pan、Bing Cai、M. Barra、Christopher A. Rhodes
DOI:10.1021/ja00044a012
日期:1992.8
been investigated by nanosecond transient absorption spectroscopy, photoacousticcalorimetry, measurements of 1 O 2 quantum yields, and photochemical studies in solution. Both the lifetime (1.4 μs) and the energy (74-76 kcal mol -1 ) of the BNEN triplet reflect its exceptional conformational rigidity, which prohibits relaxation along the 3 (π,π * ) potential energy surface by twisting around the C=C