The synthesis of a variety of spiroketal-containing systems is outlined, utilising a palladium catalysed coupling reaction in the pivotal carbon-carbon bond forming step.
Mild and General Cross-Coupling of (α-Alkoxyvinyl)silanols and -silyl Hydrides
作者:Scott E. Denmark、Luc Neuville
DOI:10.1021/ol0064112
日期:2000.10.1
[GRAPHICS](alpha-Alkoxyvinyl)silanols and (alpha-alkoxyvinyl)silyl hydrides are efficiently converted to aryl vinyl ethers by a palladium(0)-catalyzed cross-coupling reaction with aryl halides in the presence of tetrabutylammonium fluoride or hydroxide. Yields are generally high, and the reaction is compatible with a wide range of functional groups.
Two-Step One-Pot Synthesis of Benzoannulated Spiroacetals by Suzuki–Miyaura Coupling/Acid-Catalyzed Spiroacetalization
作者:Alexey N. Butkevich、Andrei Corbu、Lieven Meerpoel、Ian Stansfield、Patrick Angibaud、Pascal Bonnet、Janine Cossy
DOI:10.1021/ol302088w
日期:2012.10.5
Substituted benzoannulated spiroacetals were prepared from (2-haloaryl)alkyl alcohols and dihydropyranyl or dihydrofuranyl pinacol boronates using a Suzuki-Miyaura coupling followed by an acid-catalyzed spirocyclization. Application of the reaction to a glycal boronate provides an approach to annulated spiroacetals in enantiopure form.