| 934426-40-1

• CAS: 934426-40-1
• 化学式: C₅₀H₃₄Br₂FeN₂
• 分子量: 878.488
• InChiKey: DMIVJUIQKDSZSX-UHFFFAOYSA-N

反应信息

• 作为反应物：
  描述：

  、 在 四(三苯基膦)钯 、 caesium carbonate 作用下， 以 水 、 甲苯 为溶剂， 以22%的产率得到
  参考文献：
  名称：

  A Self-Locking Molecule Operative with a Photoresponsive Key

  摘要：

  Rotary host 1, composed of a ferrocene unit as a rotary module, is conformationally locked internally in apolar solvents such as benzene by a double intramolecular Zn-N coordination between the zinc porphyrin and aniline units, attached to each cyclopentadienyl ( Cp) ring. Upon addition of the cis form of 1,2-bispyridylethylene ( cis-2) to (+)-1 ([ cis-2]/[(+)-1]) 5.0), an enantiomer of 1, the intramolecular Zn-N coordination bonds in (+)-1 are readily cleaved to form an externally locked, cyclodimeric one-to-one complex (+)-1 superset of cis-2, accompanying a rotation of the ferrocene module, as visualized by CD spectroscopy. In contrast, use of trans-2, in place of cis-2, under otherwise identical conditions to the above, did not result in releasing the internal double lock of (+)-1. Such a large difference between the isomers of 2 in the affinity toward host 1, along with their capabilities of photochemical interconversion, allowed for the demonstration of a reversible self-locking operation of 1. Namely, the externally locked state of 1, as in the form of 1 superset of cis-2, spontaneously retrieves the internally locked state, after the release of 2 from 1 upon cis-to-trans photochemical isomerization of ligating 2, while the backward photochemical isomerization of 2 in the presence of 1 results in switching of 1 to its externally locked state.

  DOI：

  10.1021/ja0632308