作者:Manfred Schwertel、Sabine Hillmann、Herbert Meier
DOI:10.1002/hlca.201300187
日期:2013.11
C2‐Symmetric hexahelicenes 3a–3g, which bear four or six alkoxy chains, were prepared in eight‐to‐nine reaction steps in high overall yields. The final step consisted of a twofold oxidative photocyclization of the corresponding 2,7‐bis(2‐phenylethenyl)naphthalenes. Long (and branched) chains provide a good solubility and processability, which is a prerequisite for applications in organic synthesis
在8至9个反应步骤中,制备具有2或6个烷氧基链的C 2-对称六螺旋3a - 3g,具有较高的总收率。最后一步是将相应的2,7-双(2-苯基乙烯基)萘进行两次氧化光环化。长(和支链)链提供了良好的溶解性和可加工性,这是在有机合成和材料科学中应用的先决条件。