An Efficient Approach to Dihydrofurocoumarins via Palladium-Catalyzed Annulation of 1,3-Dienes by <i>o</i>-Iodoacetoxycoumarins
作者:Roman V. Rozhkov、Richard C. Larock
DOI:10.1021/jo034571w
日期:2003.8.1
by o-iodoacetoxycoumarins provides an efficient method for the synthesis of biologically interesting dihydrofurocoumarins. The presence of the acetyl group on the phenolic oxygen and the use of silver carbonate as a base are crucial for this process. This reaction is very general and regio- and stereoselective, and a widevariety of terminal, cyclic, and internal 1,3-dienes can be utilized. Derivatization
In collaboration with Jasco Corporation we have recently developed an FDCD (fluorescencedetectedcircular dichroic) instrument J-465, which eliminates the photoselection artifacts and efficiently collects the emitted light from the sample solution based on the ideal ellipsoidal mirror principle. Using the J-465 we have investigated a variety of fluorophores with/without polarization for exciton-coupled