Trialkyl phosphines PMe 3 and PEt 3 catalyze the 1,2‐ cis ‐diboration of 1,3‐butadiynes to give 1,2‐diboryl enynes. The products were utilized to synthesize 1,1,2,4‐tetraaryl enynes using a Suzuki‐Miyaura protocol and can readily undergo proto‐deborylation.
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Li et al. (2024) studied this question.
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