2-t-Alkylbuta-1,3-dienes were synthesized by the successive reaction of dialkylboranes, derived from tetrasubstituted ethenes and borane in tetrahydrofuran, with 1,4-dichlorobut-2-yne and methyl-lithium; 2-alkylthiobuta-1,3-dienes were synthesized by a similar reaction using alkylthiomagnesium bromides instead of methyl-lithium.
M. Hoshi, Y. Masuda and A. Arase, J. Chem. Soc., Chem. Commun., 1987, 1629 DOI: 10.1039/C39870001629
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