Stereoselective synthesis of substituted 1,3,5-hexatrienes from diallylic sulfones
作者:Xiao-Ping Cao、Tze-Lock Chan、Hak-Fun Chow、Jingren Tu
DOI:10.1039/c39950001297
日期:——
Substituted 1,3,5-hexatrienes 7 can be prepared in excellent yields and with good stereoselectivity from diallylic sulfones 6 employing a modified Ramberg–Bäcklund reaction.
Photoisomerization of All-<i>cis</i>-1,6-diphenyl-1,3,5-hexatriene in the Solid State and in Solution: A Simultaneous Three-Bond Twist Process
作者:Jack Saltiel、Dimitrios Papadimitriou、Tallapragada S. R. Krishna、Zhen-Nian Huang、Govindarahan Krishnamoorthy、Somchoke Laohhasurayotin、Ronald J. Clark
DOI:10.1002/anie.200902724
日期:2009.10.12
Disrotatory bicycle pedals: Irradiation of the title compound in the solid state gives the all‐trans isomer directly in a crystal‐to‐crystal reaction. This threefold cis–trans photoisomerization is proposed to proceed by a two‐stage mechanism that is consistent with two simultaneous bicycle‐pedal processes occurring in disrotatory fashion about the central bond.
Mapping the Potential Energy Surfaces of the 1,6-Diphenyl-1,3,5-hexatriene Ground and Triplet States
作者:Jack Saltiel、Janell M. Crowder、Shujun Wang
DOI:10.1021/ja982551j
日期:1999.2.1
The relative energies of the ground state isomers of 1,6-diphenyl-1,3,5-hexatriene (DPH) in benzene are determined from the temperature dependence of the equilibrium isomer composition obtained with the use of diphenyl diselenide as isomerization catalyst. In the tripletstate, DPH exists as an equilibrium mixture of all-trans (ttt), trans,cis,trans (tct), cis,trans,trans (ctt), and cis,cis,trans (cct)