Dihydropyrimidine Compounds and Their Uses in Preparation of Medicaments for Treating and Preventing Antiviral Diseases
申请人:Li Song
公开号:US20100087448A1
公开(公告)日:2010-04-08
The present invention relates to a compound of formula (I) or a pharmaceutically acceptable salt or hydrate thereof, to a process for preparing the compound of formula (I), and to use of the compound of formula (I) or a pharmaceutically acceptable salt or hydrate thereof as a medicament, in particular as a medicament for the treatment and prevention of type B hepatitis.
Cobalt-Catalyzed Oxidative C−H/C−H Cross-Coupling between Two Heteroarenes
作者:Guangying Tan、Shuang He、Xiaolei Huang、Xingrong Liao、Yangyang Cheng、Jingsong You
DOI:10.1002/anie.201604580
日期:2016.8.22
cross‐coupling between two heteroarenes is reported, which exhibits a broad substrate scope and a high tolerance level for sensitive functional groups. When the amount of Co(OAc)2⋅4 H2O is reduced from 6.0 to 0.5 mol %, an excellent yield is still obtained at an elevated temperature with a prolonged reaction time. The method can be extended to the reaction between an arene and a heteroarene. It is worth noting
报道了两个杂芳烃之间钴催化的氧化C / H / C-H交叉偶联的第一个例子,它显示出较宽的底物范围和对敏感官能团的高耐受性水平。当(OAC)Co量2 ⋅4ħ 2 O的6.0〜0.5摩尔%降低,仍然是在升高的温度下用延长反应时间得到良好的产率。该方法可以扩展到芳烃和杂芳烃之间的反应。值得注意的是,Ag 2 CO 3氧化剂是可再生的。通过自由基俘获实验,氢/氘交换实验,动力学同位素效应,电子顺磁共振(EPR)和高分辨率质谱(HRMS)进行的初步机理研究表明,单个电子转移(SET)路径是有效的,这是截然不同的通常从两个杂芳烃之间经过充分描述的氧化性C / H / C交叉偶联反应通过双C-H键激活途径进行。
Conversion of aldoximes into nitriles and amides under mild conditions
作者:Koujiro Tambara、G. Dan Pantoş
DOI:10.1039/c3ob27362h
日期:——
series of Pd(en)X2 salts were used as catalysts for the conversion of aldoximes into nitriles and amides. Highlights of this protocol include the use of inexpensive polar solvents, including water, and moderate reaction temperatures. A high degree of selectivity in the reaction outcome was observed when using aliphatic vs. aromatic/conjugated aldoximes.
Nickel Catalysis Enables Oxidative C(sp<sup>2</sup>
)-H/C(sp<sup>2</sup>
)-H Cross-Coupling Reactions between Two Heteroarenes
作者:Yangyang Cheng、Yimin Wu、Guangyin Tan、Jingsong You
DOI:10.1002/anie.201606529
日期:2016.9.26
Nickel can be used to promote oxidativeC(sp2)−H/C(sp2)−H cross‐coupling between two heteroarenes. The reaction scope can be extended to aromatic carboxamides as the coupling partner. The reaction exhibits high functional‐group compatibility and broad substrate scope. The silver oxidant can be recycled to reduce costs and waste, which is very useful for practical applications.