首页> 外文期刊>Chemistry: A European journal >Vinylation of Aldehydes Using Mn/Cr Alloy and a N-4-Ligand/Ni-II-Catalyst
【24h】

Vinylation of Aldehydes Using Mn/Cr Alloy and a N-4-Ligand/Ni-II-Catalyst

机译:Mn / Cr合金和N-4-配体/ Ni-II-催化剂对醛进行乙烯基化

获取原文
获取原文并翻译 | 示例
           

摘要

We report an efficient and practical protocol for the Cr/Ni-catalyzed vinylation of aldehydes, based on the use of Mn/Cr alloy (ca. 10% Cr) and TMSCl. No additional Cr salts need to be added. In the presence of NiCl2 (0.3mol%) and a bis(ketimino)-2,2-bipyridine as N-4-chelating ligand (1mol%), the vinylations proceed smoothly at room temperature. The presence of catalytic amounts of MeOH and LiOAc as additives was found to further promote the efficiency of the catalytic system, even in the absence of the ligand. Detailed reaction monitoring revealed that LiOAc accelerates the product alcohol silylation, thus increasing the turnover rate.
机译:我们报告了基于Mn / Cr合金(约10%Cr)和TMSCl的Cr / Ni催化醛的乙烯基化的有效和实用的协议。无需添加其他铬盐。在NiCl 2(0.3mol%)和作为N-4-螯合配体的双(ketimino)-2,2-联吡啶(1mol%)的存在下,乙烯基化在室温下顺利进行。发现即使没有配位体,催化量的MeOH和LiOAc作为添加剂的存在也可进一步提高催化体系的效率。详细的反应监测表明,LiOAc会加速产物醇的甲硅烷基化,从而提高周转率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号