A novel protocol for selective synthesis of monoclinic zirconia nanoparticles as a heterogeneous catalyst for condensation of 1,2-diamines with 1,2-dicarbonyl compounds
developed for the condensation of 1,2‐diketones with aromatic 1,2‐diamines in polyethylene glycol (PEG), providing quinoxaline derivatives in good yields. The important features of the methodology are broad substrates scope, simple workup, catalyst free, environmentally benign, and no requirement for metal catalysts. It is noteworthy that the cyclization reaction of 1,2‐diketones with aliphatic 1,2‐diamines
Crystalline nanobelts of α-MoO3 have been obtained successfully using novel and safe agents through a simple and safe solâgel method (polymerizingâcomplexing) and characterized by XRD, FT-IR, Raman spectroscopies, high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM) and the temperature programmed desorption (TPD) of ammonia. An orthorhombic lattice system for nano-MoO3 was established. The HRTEM images showed that the nanobelt morphology of α-MoO3 mostly ranged from 20â70 nm in width and 200â400 nm in length. The ammonia TPD profile demonstrated strong acidic sites. The spectral and analysis data confirmed the effectiveness of the method for the preparation of α-MoO3 nanobelts by prevention of grain growth or agglomeration of the particles. The nanostructured MoO3 exhibited a high efficiency in catalyzing the condensation reaction of various 1,2-diamine and carbonyl compounds for synthesis of heterocyclic compounds. The recovery of the title heterogenous nanocatalyst was easy and efficient and its catalytic activity was strikingly different from the bulk material.
[EN] PKB INHIBITORS AS ANTI-TUMOR AGENTS<br/>[FR] INHIBITEURS DE LA PKB UTILISES COMME AGENTS ANTITUMORAUX
申请人:IMCLONE SYSTEMS INC
公开号:WO2005007099A2
公开(公告)日:2005-01-27
The invention is directed to biaryl compounds with two six membered rings fused wherein at least one six membered ring is substituted with a thiophenyl or furanyl ring. Useful in the inhibition of PKB kinase, the treatment of cancer, or the inhibition of tumor growth.