A novel tridentate NHC–Pd(II) complex and its application in the Suzuki and Heck-type cross-coupling reactions
作者:Tao Chen、Jun Gao、Min Shi
DOI:10.1016/j.tet.2006.04.034
日期:2006.6
A noveltridentate NHC–Pd(II) complex derived from binaphthyl-2,2′-diamine (BINAM) has been synthesized and its structure has been characterized by single crystal X-ray diffraction. This NHC–Pd(II) complex was fairly effective in Suzuki and Heck-type cross-coupling reactions to give the products in good to excellent yields in most cases.
<scp>l</scp>-Proline Diamides with an Axially Chiral Binaphthylene Backbone as Efficient Organocatalysts for Direct Asymmetric Aldol Reactions: The Effect of Acetic Acid
作者:Min Shi、Guang-Ning Ma、Yun-Peng Zhang
DOI:10.1055/s-2006-958924
日期:2007.1
have been synthesized in good yields and their catalytic abilities as organocatalysts in directasymmetric aldol reactions have been evaluated. Among these organocatalysts, bis(prolinamides) exhibit higher catalytic abilities. The aldol reaction of arylaldehydes with acetone or cyclohexanone proceeds smoothly using the organocatalyst (10 mol%) in the presence of acetic acid (10 mol%) as an additive in
A novel heterobimetallic Cu/Sm/aminophenol sulfonamide complex has been developed by a convenient one-pot method for the anti-selective asymmetric Henry reaction. The corresponding anti-β-nitro alcohols are obtained in up to 99% yield, >30:1 dr, and 98% ee. The results of control experiments and ESI-MS analysis of the complex indicate that the monomeric bimetallic Cu/Sm/1 complex would be the active
通过方便的一锅法开发了一种新型的双金属Cu / Sm /氨基苯酚磺酰胺络合物,用于抗选择性不对称亨利反应。以高达99%的收率,> 30∶1的dr和98%的ee获得相应的抗-β-硝基醇。配合物的对照实验和ESI-MS分析结果表明,单体双金属Cu / Sm / 1配合物是活性物质。
Enantioselective Diels–Alder Reaction of α-Acyloxyacroleins Catalyzed by Chiral 1,1′-Binaphthyl-2,2′-diammonium Salts
作者:Akira Sakakura、Kenji Suzuki、Kazuaki Ishihara
DOI:10.1002/adsc.200600322
日期:2006.11
activity and enantioselectivity for the Diels–Alder reaction of α-acyloxyacroleins. For example, in the presence of 5 mol % of 2a and 9.5 mol % of Tf2NH, the Diels–Alder reaction of α-(cyclohexanecarbonyloxy)acrolein with cyclopentadiene proceeded in EtCN at −75 °C to give the adducts in 88 % yield with 92 % exo and 91 % ee. The electron-donating property of the acyl group of the α-acyloxyacroleins increases