• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Tandem insertion of halocarbenoids and lithium acetylides into zirconacycles: A novel rearrangement to zirconium alkenylidenates by β-addition to an alkynyl zirconocene
【24h】

Tandem insertion of halocarbenoids and lithium acetylides into zirconacycles: A novel rearrangement to zirconium alkenylidenates by β-addition to an alkynyl zirconocene

机译：将卤代类胡萝卜素和乙炔化锂串联插入到氧化锆环中：通过将β加成到炔基锆茂中，对烯基锆酸锆进行新的重排

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Tandem insertion of 1,1-dihalo-1-lithio species (halocarbenoids) and lithium alkynides into zirconacyclopentenes and zirconcyclopentanes affords carbocyclic products in high yields via an unusual rearrangement that probably involves addition of an organolithium species to the β-position of a zirconium-alkyne complex to give an alkenylidene-zirconate species. A wide variety of cyclopentanoid organic structures are rapidly assembled in good yield using this multicomponent coupling. The main side reaction, which becomes exclusive in some cases, is β-hydride elimination of an intermediate cyclopentyl- or cyclopentenyl zirconocene. Zirconocene 'ate' complexes play several roles in a versatile three-component one-pot assembly of bicyclic organic structures from a 1,6- or 1,7-enyne or -diene, an in situ generated halocarbenoid RCX_2Li and a lithium acetylide. The most likely reaction pathway involves the unprecedented β-addition of an organolithium species to an alkynyl zirconocene to give a zirconium alkenylidenate complex.
机译：将1，1-二卤-1-硫代化合物（卤代类胡萝卜素）和炔属锂串联插入氧化锆环戊烯和锆环戊烷中可通过不寻常的重排以高收率提供碳环产物，该重排可能涉及将有机锂物质添加到锆锆的β位上。炔烃配合物，得到烯基-锆酸酯。使用这种多组分偶合，可以高产率快速组装各种各样的环戊烷类有机结构。在某些情况下唯一的主要副反应是β-氢化物消除中间的环戊基或环戊烯基锆茂。锆茂的“ ate”配合物在由1,6-或1,7-炔烃或-diene，原位生成的卤代类胡萝卜素R​​CX_2Li和乙炔化锂构成的双环有机结构的多功能三组分一锅组件中发挥多种作用。最可能的反应途径涉及将有机锂物种史无前例的β加成到炔基锆茂中，从而得到烯基亚锆酸锆络合物。

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