Novel One-Pot Method for Chemoselective Bromination and Sequential Sonogashira Coupling
摘要:
An efficient one-pot method for bromination-elimination of allyl alcohol derivatives and sequential Sonogashira coupling has been developed. A highlight of the method is chemoselective DBU-promoted elimination of vicinal dibromoalkanes having an adjacent O-functional group.
TBAF-Promoted Elimination of Vicinal Dibromides Having an Adjacent O-Functional Group: Syntheses of 2-Bromoalk-1-enes and Alkynes
作者:Noriki Kutsumura、Takao Saito、Keisuke Kubokawa
DOI:10.1055/s-0030-1260089
日期:2011.8
2-bromoalk-1-enes and alkynes were achieved in good yields by dehydrobromination of vicinaldibromides with tetrabutylammonium fluoride. Neighboring O-functional-group participation is important in determining elimination reactivity. tetrabutylammonium fluoride - elimination - 2-bromoalk-1-enes - alkynes - vicinaldibromides
1,8-Diazabicyclo[5.4.0]undec-7-ene-promoted Regioselective Elimination of Vicinal Dibromides Having an Adjacent<i>O</i>- and/or<i>N</i>-Functional Group
We have investigated the DBU-promoted HBr-elimination of vicinaldibromides having an adjacent O- and/or N-functional group under mild basic conditions. The elimination of 1-oxygen-functionalized 2...
我们研究了在温和的碱性条件下 DBU 促进 HBr 消除具有相邻 O 和/或 N 官能团的邻位二溴化物。消除 1-氧功能化的 2...