Versatile Synthons for Optically Pure α-Amino Aldehydes and α-Amino Acids: (+)- and (−)-4,5-Dialkoxy-2-oxazolidinones
摘要:
[GRAPHICS]Both enantiomers of trans-5-benzyloxy-4-methoxy- (BMOx) and trans-4,5-dimethoxy-2-oxazolidinones (DMOx), which are readily accessible from simple 2-oxazolone heterocycles, represent good candidates for a new class of chiral synthons for use in the preparation of optically pure alpha -amino aldehydes and alpha -amino acids, respectively.
[EN] BIFUNCTIONAL DEGRADERS OF HEMATOPOIETIC PROGENITOR KINASE AND THERAPEUTIC USES THEREOF<br/>[FR] AGENTS DE DÉGRADATION BIFONCTIONNELS DE LA KINASE PROGÉNITRICE HÉMATOPOÏÉTIQUE ET LEURS UTILISATIONS THÉRAPEUTIQUES
申请人:NURIX THERAPEUTICS INC
公开号:WO2021226262A1
公开(公告)日:2021-11-11
The present disclosure provides bifunctional compounds as HPK1 degraders via ubiquitin proteosome pathway, and method for treating diseases modulated by HPK1.
Hepatitis C virus inhibitors having the general formula
are disclosed. Compositions comprising the compounds and methods for using the compounds to inhibit HCV are also disclosed.
Nucleophilic Acyl Substitutions of Anhydrides with Protic Nucleophiles Catalyzed by Amphoteric, Oxomolybdenum Species
作者:Chien-Tien Chen、Jen-Huang Kuo、Vijay D. Pawar、Yogesh S. Munot、Shieu-Shien Weng、Cheng-Hsiu Ku、Cheng-Yuan Liu
DOI:10.1021/jo048363v
日期:2005.2.1
[GRAPHICS]Among six different group VIb oxometallic species examined, dioxomolybdenum dichloride and oxomolybdenum tetrachloride were the most efficient catalysts to facilitate nucleophilic acyl substitution (NAS) of anhydrides with a myriad array of alcohols, amines, and thiols in high yields and high chemoselectivity. In contrast to the well-recognized redox chemical behaviors associated with oxomolybdenum(VI) species, the catalytic NAS was unprecedented and tolerates virtually all kinds of functional groups. By using benzoic anhydride as a mediator for in situ generation of an incipient mixed anhydride -MoO2Cl2 adduct with a given functional alkanoic acid, one can achieve oleate, dipeptide, diphenylmethyl, N-Fmoc-alpha-amino, pyruvic, and tert-butylthio ester, N-tert-butylamide, and trityl methacrylate syntheses with appropriate protic nucleophiles. The amphoteric character of the Mo=O unit in oxomolybdenum chlorides was found to be responsible for the catalytic NAS profile as supported by a control NAS reaction of using an authentic adduct-MoOCl2(O-2-CBut)(2) between pivalic anhydride and MoO2Cl2 as the catalyst.