Separation and Identification of Volatile Components in the Fermentation Broth of Trichoderma atroviride by Solid-Phase Extraction and Gas Chromatography--Mass Spectrometry
作者:A. Keszler、E. Forgacs、L. Kotai、J. A. Vizcaino、E. Monte、I. Garcia-Acha
DOI:10.1093/chromsci/38.10.421
日期:2000.10.1
A preseparated fermentation broth of Trichoderma atroviride strain 11 is analyzed by gas chromatography followed by mass-spectral detection using a FinniganMAT GCQ apparatus. After preseparation in a C18 and a silica gel column, nineteen pyrone and dioxolane derivatives and two aliphatic esters are obtained, respectively. Among these, the four dioxolane derivatives have not been identified previously
通过气相色谱分析随后分离的阿魏木霉菌株11的发酵肉汤,然后使用Finnigan MAT GCQ仪器进行质谱检测。在C18和硅胶柱中进行预分离后,分别获得十九个吡喃酮和二氧戊环衍生物以及两种脂族酯。其中,四种二氧戊环衍生物先前尚未鉴定。发现主要成分为5,5'-二甲基-2H-吡喃-2-on。用于确定保留时间和峰面积(以离子数测量)的相对标准偏差分别为0.1%和4.5%。
RAS INHIBITORS
申请人:Revolution Medicines, Inc.
公开号:US20210130326A1
公开(公告)日:2021-05-06
The disclosure features macrocyclic compounds, and pharmaceutical compositions and protein complexes thereof, capable of inhibiting Ras proteins, and their uses in the treatment of cancers.
AuCl3/AgSbF6-catalyzed rapid epoxide to carbonyl rearrangement
作者:Vanajakshi Gudla、Rengarajan Balamurugan
DOI:10.1016/j.tetlet.2012.07.056
日期:2012.9
An efficient epoxide to carbonyl rearrangement using catalytic AuCl3/AgSbF6 has been presented. The reactions are fast and high yielding. β-Hydrogen migration takes place exclusively when hydrogen and methyl or substituted methyl groups are present at β-carbon of epoxide. When phenyl/acetyl/benzoyl and hydrogen are available at same carbon atom, migration of the former is preferred over the latter