On the stereochemical course of the addition of allylsilanes to aldehydes
作者:Scott E. Denmark、Eric J. Weber、Neil G. Almstead、Larry M. Wolf
DOI:10.1016/j.tet.2012.05.084
日期:2012.9
preference for the synclinal transition state, albeit in very low yields. Model system 5 underwent selective and largely Lewis acid independent cyclization primarily via a synclinal transition state. The high proximal selectivity observed in these cyclizations likely reflects the selectivity of an unhindered allylmetal–aldehyde addition for the synclinal transition state and results from a stereoelectronic
A facile microwave-assisted Diels–Alder reaction of vinylboronates
作者:Ariel M. Sarotti、Pablo L. Pisano、Silvina C. Pellegrinet
DOI:10.1039/c0ob00020e
日期:——
The DielsâAlder reaction of vinylboronates can be easily performed using microwave irradiation giving excellent yields of the cycloadducts. Pinacol vinylboronate was the reagent of choice due to its stability towards hydrolysis, operational simplicity and yields of DielsâAlder products. To the best of our knowledge, this is the first example of microwave-assisted DielsâAlder reaction of boron-substituted dienophiles. Subsequent in situ oxidation of the cycloadducts with alkaline hydrogen peroxide afforded the alcohols efficiently.
Organic photochemistry with 6.7-eV photons: rigid homoallylic alcohols. An inverse Norrish type II rearrangement
作者:Joel Studebaker、R. Srinivasan、Jose A. Ors、Thomas Baum
DOI:10.1021/ja00542a048
日期:1980.10
<b>The Tricyclo[2.2.2.0<sup>-2,6</sup>]octan-3-ols and Derivatives. Preparation, Structure, and Reactivity Studies</b>
作者:Norman A. LeBel、Joel E. Huber
DOI:10.1021/ja00903a032
日期:1963.10
Application of photoelectron spectroscopy to intramolecular hydrogen bonding. 6. The relative importance of electrostatic and covalent contributions to the hydrogen bond of hydrogen-bonded alcohols containing a conjugated olefin as the electron donor