CONJUGATES OF CEREBLON BINDING COMPOUNDS AND G12C MUTANT KRAS, HRAS OR NRAS PROTEIN MODULATING COMPOUNDS AND METHODS OF USE THEREOF
申请人:Araxes Pharma LLC
公开号:US20180015087A1
公开(公告)日:2018-01-18
Conjugates of a cereblon-binding compound and compounds having modulatory activity against G12C mutant KRAS, HRAS or NRAS G12C proteins are provided. Methods associated with preparation and use of such conjugates, pharmaceutical compositions comprising such conjugates and methods to modulate the activity of G12C mutant KRAS, HRAS or NRAS G12C proteins for treatment of disorders, such as cancer, are also provided.
Enantioselective conjugate addition of aliphatic thiols to divergently activated electron poor alkenes and dienes
作者:Rafał Kowalczyk、Aleksandra J. Wierzba、Przemysław J. Boratyński、Julia Bąkowicz
DOI:10.1016/j.tet.2014.06.035
日期:2014.9
Divergently activated double bonds in electron poor 4-oxo-butenoates and (2E,4E)-6-oxo-2,4-dienoates underwent stereoselective and regioselective addition of mercaptans catalyzed by simple Cinchona alkaloids. Application of quinine and quinidine afforded both enantiomers of the 1,4-adducts with respect to the ketone carbonyl group in ees of up to 80%. Single recrystallization of some adducts resulted
A useful Michael addition reaction using nitroalkanes as the nucleophile and 4-oxo-enoates as the Michael acceptor has been disclosed, and the reaction allows expedient access to functionalized chiral gamma-keto esters in high yields and excellent enantioselectivities (up to 98% ee), with a low catalyst loading.
Legumain Activated Doxorubicin Derivative as well as Preparation Method and Application Thereof
申请人:Yafei (Shanghai) Biopharmaceutical Co., Ltd.
公开号:US20170106094A1
公开(公告)日:2017-04-20
The present invention discloses doxorubicin derivatives for targeted activation by Legumain, its preparation method and use. The doxorubicin derivatives are obtained by condensation between the amino group of compound A and the carboxyl group of compound B and have the following structure:
compounds A and B have the following structures, respectively:
wherein R
3
in compound B is Leu or absent; R
4
is any one amino acid selected from the group consisting of Ala and Thr; R
5
is any one amino acid selected from the group consisting of Ala, Thr and Asn; R
6
is
wherein n=1-20; or
wherein R
7
is substituted or unsubstituted, linear or branched, saturated or unsaturated C1-C20 fatty hydrocarbon, or substituted or unsubstituted C6-C20 aromatic hydrocarbon. The doxorubicin derivatives of the present invention are specifically tumor-targeted and have a long in vivo metabolic half-life, as compared with doxorubicin. They exhibit an efficient and safe anti-tumor effect and could be used to prepare an anti-tumor drug.
Stereoselective synthesis of tri-substituted tetrahydrothiophenes and their <i>in silico</i> binding against mycobacterial protein tyrosine phosphatase B
作者:Anshul Jain、Sushobhan Maji、Khyati Shukla、Akanksha Kumari、Shivani Garg、Ramesh K. Metre、Sudipta Bhattacharyya、Nirmal K. Rana
DOI:10.1039/d2ob00052k
日期:——
DABCO catalysed highly diastereoselective cascade thia-Michael/aldol reaction was established for the construction of diversely functionalized tetrahydrothiophenes. Their in silico structure–function activities against MptpB have also been studied.