Highly selective cross-coupling reactions of 1,1-dibromoethylenes with alkynylaluminums for the synthesis of aryl substituted conjugated enediynes and unsymmetrical 1,3-diynes
作者:Kun Wu、Chuan Wu、Xiao-Ying Jia、Lin Zhou、Qing-Han Li
DOI:10.1039/d2ra02127g
日期:——
A highly efficient method for the synthesis of aryl substituted conjugated enediynes and unsymmetrical 1,3-diynes via selective cross-couplingreactions of 1,1-dibromoethylenes with alkynylaluminums using the Pd(OAc)2–DPPE and Pd2(dba)3–TFP complexes as catalysts, respectively, has been successfully developed. Though the alkyl substituted conjugated enediynes and unsymmetrical 1,3-diynes were not obtained
Cu (I) immobilized on functionalized SBA-15: A recyclable catalyst for the synthesis of 1,3-diynes using terminal alkynes without base
作者:Zongyan Ma、Xiaoyu Wang、Shuoyun Wei、Honglei Yang、Fengwei Zhang、Peng Wang、Miao Xie、Jiantai Ma
DOI:10.1016/j.catcom.2013.04.012
日期:2013.9
A new functionalized SBA-15 catalyst immobilized CuI was successfully prepared, and the catalytic activity was tested in the oxidative homocoupling of terminal alkynes at the absence of base, and good to excellent yields was obtained to get 1,3-diynes without any side product formation in the solution of DMSO. Moreover, the system also allowed the synthesis of unsymmetric 1,3-diynes by cross-coupling of two different terminal alkynes. Finally, the catalyst could be reused for several times without a significant loss of activity. (C) 2013 Elsevier B.V. All rights reserved.