Tandem Stille/Suzuki−Miyaura Coupling of a Hetero-Bis-metalated Diene. Rapid, One-Pot Assembly of Polyene Systems
摘要:
The synthesis of a hetero-bis-metallo 1,3-butadiene is reported, and its use as an orthogonal Stille and Suzuki-Miyaura coupling partner is detailed. The tin/boron diene participated successfully in a one-pot, sequential Stille and Suzuki-Miyaura coupling protocol, and its utility was demonstrated in the two-step construction of the pentaene side chain of the Fusarium metabolite lucilactaene.
Efficient and selective external activator-free cobalt catalyst for hydroboration of terminal alkynes enabled by BiPyPhos
摘要:
Herein, a robust catalyst system, composed of a bipyridine-based diphosphine ligand (BiPyPhos) and a cobalt precursor Co(acac)2, is successfully developed and applied in the hydroboration of terminal alkynes, exclusively affording various versatile β-E-vinylboronates in high yields at room temperature.