One-Pot Carboboration of Alkynes Using Lithium Borylcyanocuprate and the Subsequent Suzuki-Miyaura Cross-Coupling of the Resulting Tetrasubstituted Alkenylborane
作者:Yuri Okuno、Makoto Yamashita、Kyoko Nozaki
DOI:10.1002/ejoc.201100373
日期:2011.7
We have developed a one-potcarboboration of internal alkynes using lithium borylcyanocuprates 3. Isolation of single crystals of 3·(thf)3 enabled us to estimate its structural and spectroscopic features. Simple mixing of 3 with ester-substituted alkynes and alkynylarenes was followed by trapping of the resulting intermediate with electrophiles to give tetrasubstituted borylalkenes 4, 5, and 8 in moderate