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.
Preparation of 2-(trimethylsilyl)methyl-2-propen-1-ol derivatives by cobalt catalyzed sp2-sp3 coupling
作者:M. Tariq Riaz、Ivanna Pohorilets、Jackson J. Hernandez、Jeovanna Rios、Nancy I. Totah
DOI:10.1016/j.tetlet.2018.06.018
日期:2018.7
l-2-propen-1-ol derivatives is described. The cobalt catalyzed coupling of a protected vinyl halide with trimethylsilylmethylmagnesium chloride shows excellent functional group tolerance and provides these synthetically useful allylsilanes in good overall yield. By this method, the use of highly concentrated organolithium reagents, complex reaction protocols, and expensive starting materials is avoided
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.
Concise and connective synthesis of exo-methylene-γ-butyrolactones
作者:Raphaël Dumeunier、Cédric Leclercq、István E Markó
DOI:10.1016/s0040-4039(02)00240-x
日期:2002.3
A novel sequence, combining an ene-reaction of the substituted allylsilane 2 with a variety of aldehydes, followed by an oxidative double desilylation, provides an efficient access to a wide range of exo-methylene-γ-butyrolactones.
作者:Livia van Innis、Jean Marc Plancher、István E. Markó
DOI:10.1021/ol0625785
日期:2006.12.1
The stereoselective synthesis of methyl monate C 2 is described using as a key step an ene-intramolecular modified Sakurai cyclization (IMSC) reaction to prepare tetrahydropyran 5. An asymmetric allylic alkylation, followed by a cross-metathesis, enables the insertion of the right-hand side chain.