The disclosure provides compounds of formula I, including their salts, as well as compositions and methods of using the compounds. The compounds have activity against hepatitis C virus (HCV) and may be useful in treating those infected with HCV.
Preparation of 1-(2,6,6-trimethyl-1-cyclohexenyl)-3-methyl-3,4-epoxy-but-1-ene from .beta.-ionone by utilizing trimethyl sulfonium chloride in the presence of a phase transfer catalyst and a base; or by utilizing a higher alkyl dimethyl sulfonium salt in the presence of a base.
the Darzens glycidic ester synthesis for converting unsaturated ketones or aldehydes into the homologated β,γ- or α,β-unsaturatedaldehydes employing sulfur ylides is described. The carbonyl group is converted into the unsaturated oxirane which is then rearranged to the new aldehyde. High yields of isomerically pure aldehydes are available by this method and the process is of practical importance in
Synthesis of poly(2-furyloxirane) with high molecular weight and improved regioregularity using macrocyclic ether as a cocatalyst to potassium <i>tert</i>
-butoxide
作者:Riting Su、Yusheng Qin、Lijun Qiao、Ji Li、Xiaojiang Zhao、Pixin Wang、Xianhong Wang、Fosong Wang
DOI:10.1002/pola.24565
日期:2011.3.15
Although anionic polymerization of FO generally gives low‐ molecular‐weight polymers even after long periods of polymerization, the reaction was greatly improved when macrocyclicether was used as a cocatalyst to potassiumtert‐butoxide. When 18‐crown‐6 was used as a cocatalyst, poly(2‐furyloxirane) (PFO) with a number‐average molecularweight (Mn) of 41.5 kg/mol and a polydispersity index of 1.3 was
2-糠基环氧乙烷(FO)是通常从非石油路线中获得的单体,是通过糠醛和三甲基氯化ulf的环氧化反应制得的。在每个制备过程中均可获得约200–300 g FO。尽管FO的阴离子聚合即使经过长时间的聚合反应也通常会得到低分子量的聚合物,但是当使用大环醚作为叔丁醇钾的助催化剂时,该反应会大大改善。当18-crown-6用作助催化剂时,聚(2-呋喃基环氧乙烷)(PFO)的分子量为数均分子量(M n在40℃下聚合72小时后,以94%的收率获得了41.5kg / mol)的多分散性指数和1.3的多分散性指数。在不存在大环醚的情况下,获得的PFO包含61.7%的头尾(H-T)结构,当使用cryptand [2,2,2]作为助催化剂时,PFO达到70.6%。具有较高的区域规则结构的PFO显示出改善的热性能。对于M n约为20.0 kg / mol的PFO,当H-T含量从61.7增加到70.6%时,其玻璃化转变温度(T