Tandem Ene-Reaction/Intramolecular Sakurai Cyclisation (IMSC): A Novel Access to Polysubstituted Tetrahydropyrans and γ-Butyrolactones Using a Unique Allylation Strategy
作者:István E. Markó、Raphaël Dumeunier、Cédric Leclercq、Bernard Leroy、Jean-Marc Plancher、Abdelaziz Mekhalfia、Daniel J. Bayston
DOI:10.1055/s-2002-28506
日期:——
The ene-reaction between a variety of aldehydes and allylsilane 22 generates highly functionalised homoallylic alcohols 23. These adducts undergo a subsequent Intramolecular Sakurai Cyclisation (IMSC), affording in good yields polysubstituted tetrahydropyran derivatives. Furthermore, oxidative desilylation of 23 provides an efficient, connective access to a range of γ-butyrolactones and α-methylene-γ-butyrolactones.
Novel tandem “ene-ISMS” methodology. Efficient and versatile assembly of a pseudomonic acid C analogue
作者:István E Markó、Jean-Marc Plancher
DOI:10.1016/s0040-4039(99)00996-x
日期:1999.7
The pseudomonicacidC analogue 19 can be readily constructed using a novel tandem methodology involving, as a key-step, an ene-reaction followed by a concomitant Intramolecular Silyl-Mediated Sakurai (ISMS) cyclisation.