Ruthenium-Mediated Cycloaromatization of Acyclic Enediynes and Dienynes at Ambient Temperature
作者:Joseph M. O'Connor、Seth J. Friese、Mark Tichenor
DOI:10.1021/ja017873t
日期:2002.4.1
trigger the cycloaromatization of the conjugated dienyne, 1-ethenyl-2-(1-pentynyl)cyclopentene (19), at room temperature in chloroform-d1 solvent to give [Cp*Ru(3a,4,5,6,7,7a-eta)-2,3-dihydro-5-(1-propyl)-1H-indene}]OTf (20, 96% yield), with no deuterium enrichment. In the absence of ruthenium the thermal cyclization reactions of unsubstituted acyclic enediynes (Bergman cycloaromatization) and acyclic
钌 (II) 阳离子 [Cp*Ru(NCMe)3]OTf (4) 在室温下在 THF 溶剂中触发无环二炔的 Bergman 环芳构化。在 THF 中用 4 处理 1,2-二(1-炔基)环戊烯(13-Me,炔基 = 丙炔基;13-Prn,炔基 = 戊炔基;13-Bui,炔基 = 4-甲基-戊-1-炔基)室温下的溶剂产生钌芳烃配合物:[Cp*Ru(3a,4,5,6,7,7a-eta)-2,3-dihydro-5,6-dialkyl-1H-indene}] OTf(15-Me,烷基 = 甲基,64% 产率;15-Prn,烷基 = 正丙基,73% 产率;15-Bui,烷基 = 4-甲基-1-戊炔基,88% 产率)。以类似的方式,4 与 1-乙炔基-2-(1-丙炔基) 环戊烯 (11) 和 [2-(1-丙炔基)-1-环戊烯-1-基] 三甲基硅烷 (14) 的室温反应导致形成 [Cp*Ru(3a,4