Facile Synthesis of Tetrahydrofurans from Cycloadditions of Vinylidenecyclopropanes with Aldehydes and Further Tunable Transformations for the Construction of Furan, Indene, and Benzo[<i>c</i>]fluorene Derivatives
作者:Chenliang Su、Xian Huang、Qingyang Liu、Xin Huang
DOI:10.1021/jo901836v
日期:2009.11.6
The cycloadditions of vinylidenecyclopropanes with aldehydes for the synthesis of tetrahydrofurans are detailed in this paper. The obtained polysubstituted tetrahydrofurans could serve as versatile intermediates to selectively produce furan, indene, and benzo[c]fluorene derivatives depending on the substituents at the tetrahydrofurans’ rings and the varied reaction conditions, which clearly exhibit
本文详细介绍了亚乙烯基亚环丙烷与醛的环加成反应,以合成四氢呋喃。取决于四氢呋喃环上的取代基和变化的反应条件,所获得的多取代四氢呋喃可作为通用中间体选择性地生产呋喃,茚和苯并[ c ]芴衍生物,这清楚地展示了对四氢呋喃合成应用的见识。已经详细讨论了这些转换的范围,局限性和机制。有吸引力的是,亚乙烯基亚环丙烷与醛的这些环加成反应以及环加合物的进一步转化为构建各种中型和大型环稠合四氢呋喃,呋喃和苯并[]提供了有效的方法。c ]芴衍生物。
CAN-Mediated Highly Regio- and Stereoselective Oxidation of Vinylidenecyclopropanes: A Novel Method for the Synthesis of Unsymmetrical Divinyl Ketone and Functional Enone Derivatives
作者:Chenliang Su、Xian Huang、Qingyang Liu
DOI:10.1021/jo800829a
日期:2008.8.1
mild conditions generates unsymmetrical divinyl ketone and functional enone derivatives in moderate to good yields with excellent regio- and stereoselectivities. The reaction mechanism was investigated on the basis of an oxygen-18tracer experiment.
Lewis Acid-Mediated Selective Cycloadditions of Vinylidenecyclopropanes with Aromatic Aldehydes: An Efficient Protocol for the Synthesis of Benzo[c]fluorene, Furan and Furo[2,3-b]furan Derivatives
作者:Chenliang Su、Xian Huang
DOI:10.1002/adsc.200800661
日期:2009.1
Three kinds of Lewis acid-mediated reactions of vinylidenecyclopropanes and aromatic aldehydes are disclosed in this paper, providing an efficient and selective synthesis of a variety of functionalized benzo[c]fluorene, furan and furo[2,3-b]furan derivatives.
本文公开了三种路易斯酸介导的亚乙烯基环丙烷与芳族醛的反应,提供了一种有效且选择性的合成各种功能化的苯并[ c ]芴,呋喃和呋喃[2,3- b ]呋喃衍生物的方法。
A Facile Access to Medium- and Large-Size Naphthalenacarbocycles via Lewis Acid Mediated Ring-Expansion Reaction of Bicyclic Vinylidenecyclopropanes
作者:Xian Huang、Chenliang Su、Qingyang Liu、Yuetong Song
DOI:10.1055/s-2007-1000844
日期:2008.1
Ring-expansion reactions of bicyclic vinylidenecyclopropanes in the presence of Lewisacid was investigated, providing an efficient method for the synthesis of naphthalenes with annulated carbocycles of various ring sizes in good to excellent yields under mild conditions.