The first approach to a new family of macrocycles: synthesis and characterization of thiacalix[2]thianthrenes
作者:Roman Zieba、Cedric Desroches、Frederic Chaput、Catherine Sigala、Erwan Jeanneau、Stephane Parola
DOI:10.1016/j.tetlet.2007.06.006
日期:2007.7
New thianthrene based macrocycles with basket shaped structures were prepared by thermal treatment of tetrakis-(N,N′-dimethylthiocarbamoyl)-tetra-tert-butyl-thiacalix[4]arene. Their structural characterization as well as the study of the formation mechanisms are presented in this article. The influence of the conformation of the starting thiacalixarene on the reaction is also discussed.
Synthesis and structural analysis of mercaptothiacalix[4]arene
作者:Photon Rao、Mir Wais Hosseini、André De Cian、Jean Fischer
DOI:10.1039/a906058h
日期:——
The synthesis of p-tert-butyltetramercaptotetrathiacalix[4]arene 1 bearing eight sulfur atoms was achieved in high overall yield (80%); the synthetic strategy used was based on the synthesis of p-tert-butyltetrathiacalix[4]arene 2, treatment of the latter with N,N-dimethylthiacarbamoyl chloride under mild conditions, thermal transposition of the O-thiacarbamoyl into the S-thiacarbamoyl derivatives in quantitative yield and deprotection of the sulfur centres by treatment with hydrazine hydrate; the conformation of compound 1 was investigated in the solid state by X-ray diffraction on a single crystal, which revealed that compound 1 adopts the 1,3-alternate conformation.