[EN] TRIOXACARCIN ANALOGS AND DIMERS AS POTENT ANTICANCER AGENTS<br/>[FR] ANALOGUES ET DIMÈRES DE TRIOXACARCINE EN TANT QU'AGENTS ANTICANCÉREUX PUISSANTS
申请人:UNIV RICE WILLIAM M
公开号:WO2019036537A1
公开(公告)日:2019-02-21
In one aspect, the present disclosure provides trioxacarcin analogs of the formula: wherein the variables are as defined herein. In another aspect, the present disclosure also provides methods of preparing the compounds disclosed herein as well as dimers of the compounds described herein. In another aspect, the present disclosure also provides pharmaceutical compositions and methods of use of the compounds disclosed herein. Additionally, drug conjugates with cell targeting moieties of the compounds are also provided.
The enantioselective hydrogenation of a variety of α-keto acetals to the corresponding α-hydroxy acetals with Pt catalysts modified with cinchonidine derivatives is described with ees up to 97% and high reaction rates, and the influence of the substrate structure, the modifier and the reaction conditions (catalyst, solvent, temperature, pressure, modifier concentration) was investigated in some detail.
Highly efficient and recyclable chiral Pt nanoparticle catalyst for enantioselective hydrogenation of activated ketones
作者:Xiuru Xue、Pu Chen、Peng Xu、Yanhua Wang
DOI:10.1016/j.catcom.2018.03.012
日期:2018.5
phase-separable chiral Pt nanoparticle catalyst exhibited excellent ee (>99%) in the enantioselectivehydrogenation of activated ketones for preparing chiral α-hydroxy acetals and chiral 1,2-diols. More importantly, the chiral catalyst could be easily separated by phase separation and directly reused in the next cycle without any loss in catalytic activity and enantioselectivity, even in the gram-scale reaction
Method of making 2,7-dimethyl-2,4,6-octatrienedial and derivatives
申请人:Loyola University of Chicago
公开号:US05107030A1
公开(公告)日:1992-04-21
The present invention is an improved method to prepare 2,7-dimethyl-2,4,6-octatrienedial and related derivative compounds. This method of making 2,7-dimethyl-2,4,6-octatrienedial and derivatives thereof includes reacting 2-butenyl-bisphosphonic acid tetraalkyl ester and at least two equivalents of protected pyruvic aldehyde derivative in a nonpolar organic solvent in the presence of an alkali metal hydroxide. Compounds prepared by this invention are useful intermediates in the preparation of carotenoids.
Reactions of 1,1-dihaloalkenes with triorganozincates: a novel method for the preparation of alkenylzinc species associated with carbon-carbon bond formation
Lithium trialkylzincates react with 1,1-dibromoalkenes 1 and 1-bromo-1-chloroalkenes 2 at -85-degrees-C in THF to give 1-bromoalkenes 5 and 1-chloroalkenes 7, respectively, upon hydrolysis. The intermediate (1-haloalkenyl)zincates 4 and 6 are stable at low temperature but, when allowed to warm to 0-degrees-C, they undergo a 1,2-alkyl migration reaction to afford alkenylzinc species 10. A variety of alkylation products 11 are obtained by the hydrolysis of 10. In the presence of (Ph3P)2Pd (5 mol%), alkenylzinc species 10 react smoothly with organic halides (AcCl, EtOCOCl, CH2=CH-(Me)Br, PhBr) to yield the corresponding coupling products 13-16.