Chemo- and Regioselective Synthesis of Alkynyl Cyclobutanes by Visible Light Photocatalysis
作者:Chao Zhou、Tao Lei、Xiang-Zhu Wei、Zan Liu、Bin Chen、Vaidhyanathan Ramamurthy、Chen-Ho Tung、Li-Zhu Wu
DOI:10.1021/acs.orglett.8b02934
日期:2018.11.2
Here is the first visible light catalytic intermolecular cross [2 + 2] cycloaddition of enynes with alkenes to alkynyl cyclobutanes established with good functional group tolerance and high reaction efficiency and selectivity. Detailed studies reveal that enynes, including nonaromatic ones, can be sensitized by fac-Ir(ppy)3 via an energy transfer pathway. Addition of the Lewis acid PPh3AuNTf2 enables
这是烯烃与烯烃向炔基环丁烷的第一个可见光催化分子间交叉[2 + 2]环加成反应,建立的炔基环丁烷具有良好的官能团耐受性和高反应效率和选择性。详细的研究表明,包括非芳族化合物在内的烯类化合物可以通过能量转移途径被fac -Ir(ppy)3致敏。路易斯酸PPh 3 AuNTf 2的添加使得交叉光[2 + 2]环加成反应能够在直接可见光辐射下或在Ru(bpy)3(PF 6)2敏化下发生。