New strategies for the construction of macrolide antibiotic subunits using organoiron precursors
作者:Anthony J. Pearson、Tapan Ray
DOI:10.1016/s0040-4020(01)91415-2
日期:1985.1
complexes 6,7 and 17 are used as precursors to a range of dienylacetic acid derivatives which are not readily available from other sources. The phenylselenolactonization of these dienes occurs in a regio- and stereocontrolled manner with conjugate attachment of a PhSe group anti to the lactone moiety in the case of cyclohexadiene derivatives. Oxidation of the allylic selenium compounds occurs with concomitant
An Enantioselective Route to Paeonilactone A via Palladium- and Copper-Catalyzed Reactions
作者:Catrin Jonasson、Magnus Rönn、Jan-E. Bäckvall
DOI:10.1021/jo991787i
日期:2000.4.1
palladium-, copper-, and enzyme-catalyzed reactions starting from 1,3-cyclohexadiene. The key step in the synthesis, a palladium(II)-catalyzed 1,4-oxylactonization of a conjugated diene, simultaneously introduces two of the oxygen substituents required for the target molecule. The synthesis also includes our recently developed copper(I)-catalyzed cross-coupling reaction between dienyltriflates with Grignard