Lewis Acid Catalyzed Reaction of Arylvinylidenecyclopropanes with Acetals: A Facile Synthetic Protocol for the Preparation of Indene Derivatives
作者:Jian-Mei Lu、Min Shi
DOI:10.1021/ol062189a
日期:2006.11.9
[Structure: see text] A number of highly substituted indene derivatives have been prepared in good yields by the reactions of arylvinylidenecyclopropanes 1 with acetals 2 in the presence of Lewis acid under mild conditions. The reaction is believed to proceed via regioselective addition of oxonium intermediate to arylvinylidenecyclopropane and the subsequent intramolecular Friedel-Crafts reaction.
Palladium-catalyzed reactions of vinylidenecyclopropanes with acetic acid
作者:Jian-Mei Lu、Min Shi
DOI:10.1016/j.tet.2006.07.052
日期:2006.9
Pd(PPh3)4-catalyzed reactions of vinylidenecyclopropanes 1 with acetic acid proceeded smoothly at 80 °C in toluene to give the corresponding acetylated dienes 2 in moderate to good yields in the presence of DPEphos ligand. The plausible mechanism is proposed on the basis of the control and deuterium labeling experiments.
Recent Development of Regio‐ and Stereoselective Aminohalogenation Reaction of Alkenes
作者:Guigen Li、S. R. S. Saibabu Kotti、Cody Timmons
DOI:10.1002/ejoc.200600990
日期:2007.6
This microreview presents the development of the catalytic aminohalogenation of olefins. The olefin substrates include electron-deficient and functionalized ones, such as α,β-unsaturated esters, α,β-unsaturated ketones and α,β-unsaturated nitriles. In addition, the first asymmetric aminohalogenation by the use of Evans chiral auxiliaries is also discussed. The convincing evidence is provided to support
Montmorillonite K-10-catalyzed intramolecular rearrangement of vinylidenecyclopropanes
作者:Jian-Mei Lu、Min Shi
DOI:10.1016/j.tet.2007.05.090
日期:2007.8
A series of naphthalene, indene, and 6aH-benzo[c]fluorene derivatives are synthesized by intramolecular rearrangement of vinylidenecyclopropanes using a heterogeneous solid acid catalyst, montmorilloniteK-10, under mild reaction conditions in good to excellent yields. The solid acidic catalyst, montmorilloniteK-10, can be recovered and reused.
在温和的反应条件下,采用多相固体酸催化剂蒙脱石K-10,通过亚乙烯基环丙烷的分子内重排反应,以良好的收率获得了一系列的萘,茚和6a H-苯并[ c ]芴衍生物。固体酸性催化剂蒙脱石K-10可回收再利用。
Reactions of Vinylidenecyclopropanes with Diphenyl Diselenide in the Presence of AIBN and Further Transformation To Produce New Naphthalene Derivatives
作者:Min Shi、Jian-Mei Lu
DOI:10.1021/jo0522613
日期:2006.3.1
mild conditions. The transformation of 4 to the corresponding methylenecyclopropanes 6 was achieved by treatment with hydrogen peroxide (H2O2) in toluene, and these were further transformed to the corresponding naphthalene derivatives 7 by treatment with 30 mol % of TfOH in dichloromethane.