1,4-Dialkynylbutatrienes: Synthesis, Stability, and Perspectives in the Chemistry of carbo-Benzenes
作者:Valérie Maraval、Léo Leroyer、Aya Harano、Cécile Barthes、Alix Saquet、Carine Duhayon、Teruo Shinmyozu、Remi Chauvin
DOI:10.1002/chem.201002769
日期:2011.4.26
The π‐electron‐rich C8‐conjugated sequence of 1,4‐dialkynylbutatrienes is identified as a fragile and fascinating motif occurring in carbo‐benzene derivatives, and in Diederich’s 1,4‐bis(arylethynyl)‐ or 1,4‐bis(triisopropylsilylethynyl)butatriene “capped” representatives, in particular, in tetraalkynylbutatriene. The family of symmetrical 1,4‐dialkynylbutatrienes (ECC)RCCCCR(CCE) is extended
1,4-二炔基丁烯的π电子富集的C 8共轭序列被确定为碳苯衍生物和Diederich的1,4-双(芳基乙炔基)或1,4-双中存在的脆弱而令人着迷的基序(三异丙基甲硅烷基乙炔基)丁三烯被“封端”,特别是在四炔基丁三烯中。对称1,4- dialkynylbutatrienes的家族(E CC)RCCCCR(CC E)延伸到功能帽(E = H,CH 3,CCPh,CPhCHBr或CPhCBr 2)与在SP非炔基取代基2个的顶点(R =苯基或CF 3)。选择这些靶标的原因是它们具有吸引人的向碳合成逆向合成路线的潜力-苯,其中芳香族C 18大环将通过顺序复分解或还原偶联过程直接生成。通过用于制备普通丁烯的经典方法(R'Li / CuX介导的宝石-二卤代炔的还原偶联或SnCl 2 / HCl介导的3,6-二氧-辛基还原反应)合成功能性1,4-二炔基丁烯。 -1、4、7-三炔前体