Modular Construction of Fluoroarenes from a New Difluorinated Building Block by Cross-Coupling/Electrocyclisation/Dehydrofluorination Reactions
作者:Jonathan M. Percy、Helena Emerson、James W. B. Fyfe、Alan R. Kennedy、Sergej Maciuk、David Orr、Lucie Rathouská、Joanna M. Redmond、Peter G. Wilson
DOI:10.1002/chem.201601584
日期:2016.8.16
were used to assemble precursors to 6π‐electrocyclisations of three different types. Electrocyclisations took place at temperatures between 90 and 240 °C, depending on the central component of the π‐system; nonaromatic trienes were most reactive, but even systems that required the temporary dearomatisation of two arenyl subunits underwent electrocyclisation, albeit at elevated temperatures. Photochemical
The 12-s-cis conformationally locked 11-cis-retinoids: a delineation of the thermal requirements for [1,5]-sigmatropic shifts and electrocyclizations in the vitamin A series and novel spectral properties
作者:Roshantha A. S. Chandraratna、Ann L. Bayerque、William H. Okamura