Abstract
The reaction of terminal acetylenes with (Ph 3Ge) 2Cu(CN)Li 2 ( 1) or (Et 3Ge) 2Cu(SMe 2)Li ( 2) provides vinylgermanes in good yields. Whereas germylcupration of 1-dodecyne gives 2-germyl-1-dodecene as a main product, germylmetalation of phenylacetylene or 3-methyl-3-buten-1-yne affords 1-germyl compounds preferentially.
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