An efficient synthesis of (E)-α,β-unsaturated ketones and esters with total stereoselectivity by using chromium dichloride
作者:José M. Concellón、Humberto Rodríguez-Solla、Carmen Méjica
DOI:10.1016/j.tet.2006.01.052
日期:2006.4
(E)-α,β-Unsaturatedketones 1 or esters 2 can be obtained with complete stereoselectivity by reaction of different 2-chloro-3-hydroxy ketones 3 or esters 4 and CrCl2. A comparative study of the results of synthesis of ketones 1 with CrCl2 or samarium is performed. A mechanism to explain both β-elimination reactions has been proposed.
METHODS TO INDUCE TARGETED PROTEIN DEGRADATION THROUGH BIFUNCTIONAL MOLECULES
申请人:Dana-Farber Cancer Institute, Inc.
公开号:US20160176916A1
公开(公告)日:2016-06-23
The present application provides bifunctional compounds which act as protein degradation inducing moieties. The present application also relates to methods for the targeted degradation of endogenous proteins through the use of the bifunctional compounds that link a cereblon-binding moiety to a ligand that is capable of binding to the targeted protein which can be utilized in the treatment of proliferative disorders. The present application also provides methods for making compounds of the application and intermediates thereof.
A series of 2-[4-(thiazol-2-yl)phenyl]propionic acids substituted at various positions were prepared by the reaction of diethyl 2-methyl-2-(4-thiocarbamoylphenyl)malonates with alpha-bromoaldehyde diethyl acetals or alpha-haloketones followed by hydrolysis of esters. The inhibition of prostaglandin H synthetase (cyclooxygenase) was assayed by use of an enzyme preparation from guinea pig polymorphonuclear
Asymmetric reduction of ketones using recombinant E. coli cells that produce a versatile carbonyl reductase with high enantioselectivity and broad substrate specificity
The gene encoding a versatile biocatalyst that shows highenantioselectivity for a variety of ketones, SCR (Saccharomyces cerevisiae carbonyl reductase), has been identified, cloned, and expressed in Escherichia coli. Two types of expression systems with high NADPH-regenerating capacities have been constructed. One is the tandem system, where the genes encoding SCR and GDH (glucose dehydrogenase) are
编码,显示出对多种酮具有高对映选择性的通用基因的基因SCR(酿酒酵母羰基还原酶)已在大肠杆菌中鉴定,克隆和表达。已经构建了具有高NADPH再生能力的两种类型的表达系统。一个是串联系统,其中编码SCR和GDH(葡萄糖脱氢酶)的基因位于同一质粒中,另一个是双质粒系统,其中SCR和GDH的每个基因位于可以共存的单独质粒中在一个大肠杆菌细胞中 重组大肠杆菌不对称还原酮细胞产生合成有用的20种醇,其中11种对映体纯。这些产品之一的生产率高达41 g / L。
1-Substituted-1-oxo-prostane-derivatives of the E, A and F series
申请人:American Cyanamid Company
公开号:US04297516A1
公开(公告)日:1981-10-27
The invention disclosed herein relates to pharmacologically active prostaglandin derivatives of the E, F, or A series having on the terminal methylene carbon of the alpha chain, a substituent selected from the group consisting of: ##STR1## wherein R is C.sub.1 to C.sub.6 alkyl, and phenyl or phenyl substituted with one or more substituents selected from the group consisting of C.sub.1 -C.sub.4 alkyl, OR.sub.16, SR.sub.16, F, or Cl, and R.sub.16 is C.sub.1 to C.sub.6 alkyl.