Au(I)-Catalyzed Efficient Synthesis of Functionalized Bicyclo[3.2.0]heptanes
作者:Guotao Li、Xiaogen Huang、Liming Zhang
DOI:10.1021/ja802294t
日期:2008.6.1
An efficient Au(I)-catalyzed synthesis of highly strained and functionalized bicyclo[3.2.0]heptanes is developed. Subsequent couplings with various nucleophiles offer additional structural features/complexity. These one-pot, three-component reactions are proposed to proceed via a key 1,3-dipolar cycloaddition between a Au carbenoid-containing carbonyl ylide and ethyl vinyl ether.
Pd(II)-Catalyzed Tandem Heterocyclization of 1-(1-Alkynyl)cyclopropyl Oxime Derivatives for the Synthesis of Functionalized Pyrroles
作者:Dong Pan、Yin Wei、Min Shi
DOI:10.1021/acs.orglett.6b02068
日期:2016.8.5
An efficient approach for the synthesis of highly functionalized pyrroles has been developed by a Pd(TFA)2-catalyzed tandem heterocyclization of 1-(1-alkynyl)cyclopropyl oxime derivatives under mild conditions. The reaction first proceeded via an intramolecular nucleophilic attack followed by a ring-opening process and then intermolecular nucleophilic attack as well as protonation to afford the desired
Highly Diastereoselective Gold- or Copper-Catalyzed Formal [4+3] Cycloaddition of 1-(1-Alkynyl) Cyclopropyl Ketones and Nitrones
作者:Yu Bai、Jie Fang、Jun Ren、Zhongwen Wang
DOI:10.1002/chem.200901133
日期:2009.9.14
Domino day: A highlydiastereoselective Cu‐ or Au‐catalyzed tandem cycloisomerization/formal [4+3] cycloaddition of 1‐(1‐alkynyl) cyclopropylketones and nitrones has been developed (see scheme) along with an efficient one‐pot, three‐component version of this reaction. This methodology provides a route to a new type of 5/7‐bicyclic heterocycle: a furan‐fused oxazepine.
An efficient synthesis of highly substituted furans via the electrophilic cyclization of 1-(1-alkynyl)-cyclopropyl ketones
作者:Xian Huang、Weijun Fu、Maozhong Miao
DOI:10.1016/j.tetlet.2008.02.081
日期:2008.4
The electrophiliccyclization of 1-(1-alkynyl)-cyclopropyl ketones offers an efficient and straightforward route to highly substituted furans under extremely mild reaction conditions. Iodine, NIS, and PhSeBr have proven successful as electrophiles in this process.
Unexpected Formation of (<i>E</i>)-4-Alkene 1,3-Diketones from the Three-Component Reaction of Lithium Selenolates with 1-(1-Alkynyl)cyclopropyl Ketones and Aldehydes
作者:Jianfeng Xu、Luling Wu、Xian Huang
DOI:10.1021/jo2005439
日期:2011.7.15
A novel three-component stereoselective synthesis of (E)-4-alkene 1,3-diketones from lithium selenolates, 1-(1-alkynyl)cyclopropylketones, and aldehydes is reported. This reaction afforded the products in moderate to good yields with the formation of a new C–Se single bond, a new C–C double bond, and a new C–O double bond.