arenes using Rh nanoparticles on molecularly modified silica supports (Rh@Si–R) as highly effective and recyclable catalysts. The catalystpreparation comprises grafting non-polar molecular entities on the SiO2 surface generating a hydrophobic environment for controlled deposition of well-defined rhodium particles from a simple organometallic precursor. A broad range of fluorinated cyclohexane derivatives
氟化环己烷衍生物的生产是通过在分子改性的二氧化硅载体(Rh @ Si–R)上作为高效且可回收的催化剂,使用Rh纳米粒子对易得的氟化芳烃进行选择性氢化来完成的。催化剂制备包括将非极性分子实体接枝在SiO 2表面上,从而产生疏水性环境,以控制从简单的有机金属前体中沉淀出明确的铑颗粒。各种氟化环己烷衍生物被证明具有出色的功效(0.05–0.5 mol%Rh,10–55 bar H 2,80–100°C,1-2小时),包括与工业相关的构建基块。添加CaO作为痕量HF的清除剂可大大提高催化体系的可回收性,并防止与HF存在相关的风险,而不会影响反应的活性和选择性。
Quinazolinone compounds with reduced bioaccumulation
申请人:Boyce S. Rustum
公开号:US20050192297A1
公开(公告)日:2005-09-01
A variety of small molecule, guanidine-containing molecules capable of acting as MC4-R agonists are provided. The compounds are useful in treating MC4-R mediated diseases when administered to subjects. The compounds have the formula IA and IB. IA and IB have the following structures where Z has the formula shown below and the rest of the variables are defined herein
A variety of low molecular weight, guanidino-containing molecules capable of acting as MC4-R agonists are provided. The compounds are useful in treating MC4-R mediated diseases. The compounds have the structure IA, IB, or IC where the values of the variable are defined herein.
A variety of small molecule, guanidine-containing molecules capable of acting as MC4-R agonists are provided. The compounds are useful in treating MC4-R mediated diseases when administered to subjects. The compounds have the structures VA, VB, VIIA and VIIB where the values of the variables are defined herein.
A variety of low molecular weight, guanidino-containing molecules capable of acting as MC4-R agonists are provided. The compounds are useful in treating MC4-R mediated diseases. The compounds have the structure of Formulas (IA), (IB), or (IC): where the values of the variable are defined herein.