From Allenes to Tetracenes: A Synthetic and Structural Study of Silyl- and Halo-Allenes and Their Dimers
作者:Emilie V. Banide、Bevin C. Molloy、Yannick Ortin、Helge Müller-Bunz、Michael J. McGlinchey
DOI:10.1002/ejoc.200600905
日期:2007.6
and hydrolysis of 13d yields 3,3-(biphenyl-2,2′-diyl)-1-(trimethylsilyl)allene (20), which forms successively the head-to-tail dimer 1-(9-fluorenylidene)-4-(trimethylsilyl)-2-[(trimethylsilyl)methylene]spiro[cyclobutane-3,9′-[9H]fluorene] (21) and the tail-to-tail dimer trans-3,4-bis(trimethylsilyl)-1,2-di(fluorenylidene)cyclobutane (23) both of which exhibit long (ca. 1.6 A) C(3)–C(4) bonds. Treatment
C13H8(OH)–C≡C–R 类型的 9-炔基芴-9-醇,其中 R 是苯基 (1a)、对甲苯基 (1b)、对甲氧基苯基 (1c) 或三甲基甲硅烷基 (1d),与HBr 产生相应的溴丙二烯 C12H8C=C=C(Br)R (13a-d)。13d 的锂化和水解产生 3,3-(biphenyl-2,2'-diyl)-1-(trimethylsilyl)allene (20),它依次形成头尾二聚体 1-(9-fluorenylidene)-4 -(trimethylsilyl)-2-[(trimethylsilyl)methylene]spiro[cyclobutane-3,9'-[9H]芴] (21) 和尾对尾二聚体 trans-3,4-bis(trimethylsilyl)-1 ,2-二(芴基)环丁烷 (23) 两者都表现出长 (ca. 1.6 A) C(3)–C(4) 键。用 TBAF 处理