syn stereocontrol in the directed dihydroxylation of acyclic allylic alcohols
作者:Timothy J. Donohoe、Nicholas J. Newcombe、Michael J. Waring
DOI:10.1016/s0040-4039(99)01371-4
日期:1999.9
The preparation and directed dihydroxylation of a series of acyclic allylicalcohols is reported. The oxidation reaction is capable of demonstrating high levels of diastereoselection for the syn isomer. An explanation of the observed selectivities based on the degree of allylic strain is presented and a transition state model proposed.
Silafunctional compounds in organic synthesis. 30. Intramolecular hydrosilation of alkenyl alcohols: A new approach to the regioselective synthesis of 1,2- and 1,3-diols
作者:Kohei Tamao、Tetsu Tanaka、Takashi Nakajima、Ritsuo Sumiya、Hitoshi Arai、Yoshihiko Ito
DOI:10.1016/s0040-4039(00)84800-5
日期:1986.1
Intramolecular hydrosilation of allyl and homoallyl alcohols and the subsequent oxidative cleavage of the resultant carbon—silicon bond have provided a new approach to the regio-controlled synthesis of 1,2- and/or 1,3-diols.
Singlet oxygen addition to chiral allylic alcohols and subsequent peroxyacetalization with β-naphthaldehyde: synthesis of diastereomerically pure 3-β-naphthyl-substituted 1,2,4-trioxanes
作者:Axel G. Griesbeck、Tamer T. El-Idreesy、Johann Lex
DOI:10.1016/j.tet.2006.05.093
日期:2006.11
The synthesis of a series of eight β-naphthyl-substituted 1,2,4-trioxanes 3a–h by a sequence of singlet oxygen ene reaction of allylic alcohols 1a–h and Lewis acid catalyzed peroxyacetalization of the allylic hydroperoxides 2a–h with β-naphthaldehyde is reported. The ene reactions were performed by solid-state photooxygenation in dye-crosslinked polystyrene beads and resulted in mixtures of diastereoisomeric
cyclohexane-1,4-dione with allylichydroperoxides 2a-d, bearing an additional hydroxy group in the homoallylic position, by diastereoselective photooxygenation of allylic alcohols 1a-d and subsequent BF3-catalyzed peroxyacetalization with the diketone. From the reaction of a monoprotected cyclohexane-1,4-dione 5 with the allylichydroperoxide 6 derived from the singletoxygenation of methyl hydroxytiglate
The reaction of α,β-epoxysilanes with metallated alkylaryl sulphones. A novel approach to allylic alcohols
作者:Marek Masnyk、Jerzy Wicha
DOI:10.1016/s0040-4039(00)87917-4
日期:1988.1
Lithiated alkylaryl sulphones (-) react with α,β-epoxysilane () to yield O-trimethylsilyl allylic alcohols (-), predominantly as Z isomers. The BF3-assisted reaction followed by treatment of the adduct with nBu4NF affords allylic alcohols.