Visible‐light‐induced heterogeneous photocatalysis for decarboxylative alkynylation has been performed. The using of cheap, metal‐free and recyclable graphitic carbonnitride (g‐C3N4) as the photoredox catalyst in the process enables the facile transformation of a variety of carboxylic acids into structurally diverse alkyne‐containing molecular architectures under mild and environmentally‐benign conditions
可见光诱导的非均相光催化脱羧炔基反应。使用便宜,无金属且可回收的石墨氮化碳(g ‐ C 3 N 4)作为该过程中的光氧化还原催化剂,可以在温和和环境友好的条件下将多种羧酸轻松转化为结构多样的含炔分子结构。明显地,反应系统的非均质性质允许催化剂在多次运行中的回收和再利用而不损失反应性。光催化反应也可以以连续流动的方式进行并按比例放大至克级。此外,该策略在未活化烯烃的1,2氨基炔基化中的应用进一步凸显了该策略的制备能力。
Visible-Light-Induced C–H Bond Aminoalkylation of Heterocycles by the Decarboxylation Coupling of Amino Acids
作者:Yifan Li、Changhui Dai、Shentong Xie、Ping Liu、Peipei Sun
DOI:10.1021/acs.orglett.1c02014
日期:2021.8.6
An efficient visible-light-induced decarboxylative coupling reaction of N-protecting α-amino acids with heterocycles for the generation of aminoalkylated heterocycles is presented. A series of aminoalkylated heterocycles were obtained in moderate to good yields. Attractive features of this process include the generation of aminomethyl radical by an inexpensive organic photocatalyst under transition-metal-free
The present invention relates to compounds of the formula
methods for the preparation thereof, and methods for their use. The compounds are useful in treating diseases characterized by the hyperactivity of MEK. Accordingly the compounds are useful in the treatment of diseases, such as cancer, cognitive and CNS disorders, and inflammatory/autoimmune diseases.
METHOD FOR INHIBITING PROLIFERATION OF TUMOR CELLS
申请人:Niu Huifeng
公开号:US20080207563A1
公开(公告)日:2008-08-28
Disclosed are methods for synergistically inhibiting the proliferation of tumor cells by contacting the tumor cells with a MEK inhibitor compound and erlotinib, either sequentially or simultaneously. Also disclosed are methods for inhibiting the proliferation of tumor cells in a human, by administering to the human, sequentially or simultaneously, an amount of erlotinib and a MEK inhibitor compound, wherein the amounts are effective, in combination, to synergistically inhibit the proliferation of the tumor cells in the human.