Synthesis of 2-boryl-1,3-butadienes from tributylphosphine stabilized zirconacyclopropenes and alkynes |
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| Authors: | Alina Botvinik Abed Al Aziz Quntar Avri Rubinstein Morris Srebnik |
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| Affiliation: | aDepartment of Medicinal Chemistry and Natural Products, Hebrew University, Jerusalem 91120, Israel;bDepartment of Pharmaceutics. Hebrew University, Jerusalem 91120, Israel;cDepartment of Material Engineering, Faculty of Engineering, Al Quds University, Abu Dies, East Jerusalem, Palestinian Authority |
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| Abstract: | Boryl zirconacycopropenes stabilized with tributylphosphine react with alkynes (terminal and internal) to give predominately 2-boryl-1,3-butadienes, 5, in 40-81% isolated yields. Products 5 are accompanied by 4-boryl-1,3-butadienes in 7-23% when terminal alkynes are inserted. However, the use of an internal alkyne (3-hexyne) gave predominantly 6c. |
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| Keywords: | Boryl zirconacyclopropene Phosphine Alkyne insertion Boryl-1,3-butadiene |
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