Cofacial cyclopentadienes. Synthesis and reactions of 1,8-bis(cyclopentadienyl)naphthalene
作者:Dana A. Gronbeck、Stephen A. Matchett、Myron Rosenblum
DOI:10.1016/s0040-4039(00)99148-2
日期:1989.1
The reaction of Cyclopentadienylcopper·SMe2 with 1,8-diiodonaphthalene gives 1,8-bis(cyclopentadienyl)naphthalene 3, which undergoes a sigmatropic shift followed by an intramolecular Diels-Alder reaction, yielding the dicyclopentadiene 5. Cycloreversion of 5 in the presence of sodium hydride, and trapping of the dianion with ferrous chloride, gives the bridged ferrocene 11.
环戊二烯基铜·SMe 2与1,8-二碘代萘的反应生成1,8-双(环戊二烯基)萘3,其发生σ位移,随后发生分子内Diels-Alder反应,生成二环戊二烯5。的裂环作用5中,在氢化钠的存在下,并用氯化亚铁的二价阴离子的捕捉,给人的桥接二茂铁11。