General and Rapid Pyrimidine Condensation by Addressing the Rate Limiting Aromatization
作者:Daniel R. Fandrick、Delia Reinhardt、Jean-Nicolas Desrosiers、Sanjit Sanyal、Keith R. Fandrick、Shengli Ma、Nelu Grinberg、Heewon Lee、Jinhua J. Song、Chris H. Senanayake
DOI:10.1021/ol500886a
日期:2014.6.6
and activated olefins was addressed to provide for a general and rapid process. A strong solvent effect was elucidated to affect the rate for the initial alkoxide elimination from the intermediate Michael adduct wherein polar aprotic solvents demonstrate an addition controlled aromatization. Spectroscopic studies support a solvent dependent equilibrium between the amidine and alkoxide base wherein the
Supramolecular frameworks based on 5,10,15,20-tetra(4-carboxyphenyl)porphyrins
作者:Mahbod Morshedi、Jas S. Ward、Paul E. Kruger、Nicholas G. White
DOI:10.1039/c7dt04162d
日期:——
and freebase tetra(carboxyphenyl) and tetra(carboxylatophenyl) porphyrins. When the tetracarboxylates were crystallized with bis(amidinium) species, their crystal structures contained a range of hydrogen bond geometries, and we did not obtain well-ordered networks. Use of a tetrahedral tetra(amidinium) buildingblock yielded a 3D framework material with a PtS topology, which contains only a “paired”