20231-57-6Relevant articles and documents
Coordination of sodium cation to an oxygen function and olefinic double bond to form molecular adduct ion in fast atom bombardment mass spectrometry
Morisaki, Naoko,Kobayashi, Hisayoshi,Yamamura, Yumiko,Morisaki, Masuo,Nagasawa, Kazuo,Hashimoto, Yuichi
, p. 935 - 940 (2002)
Steroidal allylic alcohols formed Na+ adduct ion peaks [M+Na]+ by the addition of NaCl in FAB mass spectrometry. A comparison of the intensities of the adduct ion peaks of allylic alcohols with those of the corresponding saturated alcohols and olefin suggested that the olefinic double bond and the proximal hydroxyl group had coordinated to Na +. The adduct ion was stable and did not undergo dehydroxylation. We suggest that the Na+ adduct ion will be useful for the molecular weight determination of allylic alcohols which are susceptible to dehydroxylation under FAB mass spectrometric conditions. Na+ adduct ions of α, β-unsaturated carbonyl compounds were also investigated.
Elucidation of Distinct Modular Assemblies of Smoothened Receptor by Bitopic Ligand Measurement
Zhao, Fei,Wu, Yiran,Zhou, Fang,Xue, Dongxiang,Zhao, Simeng,Lu, Wanglong,Liu, Xiaoyan,Hu, Tao,Qiu, Yanli,Li, Rongyan,Gu, Tangjie,Xu, Yueming,Xu, Fei,Zhong, Guisheng,Jiang, Zhongxing,Zhao, Suwen,Tao, Houchao
supporting information, p. 13830 - 13840 (2021/09/28)
Class F G protein-coupled receptors are characterized by a large extracellular domain (ECD) in addition to the common transmembrane domain (TMD) with seven α-helixes. For smoothened receptor (SMO), structural studies revealed dissected ECD and TMD, and th
An effective synthesis of ursodeoxycholic acid from dehydroepiandrosterone
Chen, Wang,Hu, Daihua,Feng, Zili,Liu, Zhaopeng
supporting information, (2021/06/16)
A novel synthetic route of producing ursodeoxycholic acid (UDCA) was developed through multiple reactions from plant-source dehydroepiandrosterone (DHEA), with a Mistunobu reaction and regioselective allyl oxidationat as the key steps. The reaction conditions of the key allyl oxidation reaction were also investigated and optimized, including solvent, oxidant and reaction temperature. In this novel route for the preparation of UDCA, most of the reaction steps have high conversions and overall yield up to 35% for 8 steps. Since all starting materials are cost-effective, commercially available and effectively avoided the risk of animal derived raw materials, this promising synthetic route offers economical and efficient strategies for potential production of UDCA.
OXYSTEROLS AND METHODS OF USE THEREOF
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, (2018/05/16)
Compounds are provided according to Formula (I): and pharmaceutically acceptable salts thereof, and pharmaceutical compositions thereof; wherein R2, R3, R4, R5, and and R6 are as defined herein. Compounds of the present invention are contemplated useful for the prevention and treatment of a variety of conditions.
