Direct Synthesis of Alkynylstannanes: ZnBr2 Catalyst for the Reaction of Tributyltin Methoxide and Terminal Alkynes

Metal hopping: Various alkynylstannanes were synthesized by the direct reaction of Bu3SnOMe with terminal alkynes at room temperature in the presence of a ZnBr2 catalyst. Rather than acting as a Lewis acid, ZnBr2 was transmetalated with Bu3SnOMe to give Zn(OMe)2, which is key to the catalytic reaction. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.