Quantitative Gas-Solid Reactions with ClCN and BrCN: Synthesis of Cyanamides, Cyanates, Thiocyanates, and Their Derivatives
摘要:
Gas-solid reaction techniques allow quantitative cyanations with ClCN and BrCN. Three primary and four secondary cyanamides, a cyanimide, four cyanates, and four thiocyanates were all prepared as solids in 100% yield from solid anilines, benzimidazoles, imides, phenolates, and thiolates, respectively. Intramolecular solid-state reactions of cyanated o-aminophenol and of cyanated hydrazides gave heterocyclic compounds. When comparable reactions were performed in solution the reported product yields were considerably less than 100 % in all cases. The reasons for the success of the environmentally benign solid-state syntheses are discussed in terms of phase rebuilding, phase transformation, and crystal disintegration. Atomic force microscopy (AFM) of selected systems indicates the occurrence of long-range molecular movements which are governed by the crystal packing. This is evident from the obvious correlations between the molecular movements and the known crystal packing data, A new type of geometric surface feature, a rectangular and a rhombic depression which resembles a swimming-pool basin, was found in the cyanation of o-aminophenol and benzohydrazide.
Synthesis and In Vivo Antimalarial Activity of Quinoline/Mercaptopurine Conjugates
作者:Nicolli Bellotti de Souza、Rafael Carvalhaes、Arturene Maria Lino do Carmo、Marcio Jose Martins Alves、Elaine Soares Coimbra、Sonia Maria Neumann Cupolilo、Clarice Abramo、Adilson David Da Silva
DOI:10.2174/157018012799859990
日期:2012.4.26
describe the preparation, characterization and antimalarial activity in vivo of novel quinoline/mercatopurine conjugates. The compounds were tested in vivo in a murine model using chloroquine as a reference compound. The values of inhibition of parasite multiplication relative to chloroquine were determined and the compound 4-(6’-mercatopurine)-7-chloroquinoline was considered statistically identical to