Cobalt‐Catalyzed Dimerization and Homocoupling of Terminal Alkynes. Issue 1 (29th November 2017)

• Record Type: Journal Article
• Authors: Xu, Daqian; Sun, Qiangsheng; Quan, Zhengjun; Wang, Xicun; Sun, Wei
• Is Part Of: Asian journal of organic chemistry. Volume 7:Issue 1(2018)
• Page Start: 155
• Page End: 159
• Publication Date: 2017-11-29
• Subjects: alkynes -- cobalt -- dimerization -- homocoupling; Chemistry, Organic -- Periodicals; Organic compounds -- Synthesis -- Periodicals; 547.005
• DOI: 10.1002/ajoc.201700587
• Languages: English
• ISSNs: 2193-5807

Abstract

Abstract: Methods toward the dimerization and homocoupling of terminal alkynes have been established that employ Co complexes along with t BuOK under different atmosphere. A variety of Z ‐1, 3‐enynes were furnished with a high Z : E (up to 93:7) ratio in moderate to very good yields under inert atmosphere. Alternatively, the Glaser homocoupling reaction of terminal alkynes was also accomplished with a Co catalyst, successfully affording various 1, 3‐diynes in excellent yields (up to 93 %) under oxygen. Abstract : Cobalt out the kinks : Z ‐selective dimerization and homocoupling of terminal alkynes has been accomplished by Cobalt complexes in excellent yields under different atmosphere (see scheme).