Selective arylation at the vinylic site of cyclic olefins
作者:Xiaojin Wu、Jianrong (Steve) Zhou
DOI:10.1039/c3cc41722k
日期:——
Cyclicolefins usually give Heck products having an aryl ring residing at the allylic or homoallylic position. We describe herein a new method that allows arylation at the vinylic position of various cyclicolefins.
Chiral Synthesis via Organoboranes. 11. Hydroboration. 82. Asymmetric Hydroboration of 1-Heteroarylcycloalkenes with Monoisopinocampheylborane. Synthesis of<i>trans</i>-2-Heteroarylcycloalkyl Boronates and Derived Alcohols of Very High Enantiomeric Purity
作者:Herbert C. Brown、Ashok K. Gupta、J. V. N. Vara Prasad
DOI:10.1246/bcsj.61.93
日期:1988.1
The hydroboration of representative 1-heteroarylcycloalkenes with monoisopinocampheylborane (IpcBH2) was investigated systematically to establish the degree of asymmetric induction during hydroboration. The hydroboration of 1-heteroarylcyclopentene with IpcBH2 at −25 °C proceeded cleanly to afford the corresponding dialkylboranes. These dialkylboranes, upon treatment with acetaldehyde and then oxidation
系统地研究了代表性 1-杂芳基环烯烃与单异松蒎基硼烷 (IpcBH2) 的硼氢化反应,以确定硼氢化反应过程中的不对称诱导程度。1-杂芳基环戊烯与 IpcBH2 在 -25 °C 下的硼氢化反应顺利进行,得到相应的二烷基硼烷。这些二烷基硼烷用乙醛处理然后氧化,得到相应的 85-86% ee 的反式-2-杂芳基环烷醇。类似地,1-杂芳基环己烯在用 IpcBH2 进行硼氢化反应后,再进行乙醛处理和氧化,得到相应的醇(约 10 毫升)。90% EE。衍生自 1-杂芳基环戊烯和 IpcBH2 的二烷基硼烷或烷基硼酸可以重结晶以提供接近 100% ee 的材料。从这样的二烷基硼烷或烷基硼酸,相应的硼酸盐约。制备并分离了 100% ee。这些被证明是用于有机合成的高度通用的合成中间体。
Compounds with activity at estrogen receptors
申请人:Olsson Roger
公开号:US20060122278A1
公开(公告)日:2006-06-08
Disclosed herein are novel di-aromatic compounds and methods for using various di-aromatic compounds for treatment and prevention of diseases and disorders related to estrogen receptors.
Disclosed herein are methods of treatment and prevention of diseases and disorders related to estrogen receptors comprising administering novel di-aromatic compounds to patients in need thereof.
An Acid-Catalyzed Formal Allylic C−H Oxidation of Aryl Cycloalkenes with <i>N</i>-Propylthiosuccinimide
作者:Deshun Huang、Haining Wang、Huan Guan、Hu Huang、Yian Shi
DOI:10.1021/ol200261a
日期:2011.3.18
A mild acid-catalyzed formal allylic C-H oxidation of aryl cycloalkenes with N-propylthlosuccinimide in the presence of various nucleophiles to generate allylic ethers, esters, and sulfonamides is described. A possible reaction mechanism has been proposed.