Simplified procedures for the Ir-catalyzed asymmetric allylicalkylation reaction are described that often allow substitution products to be obtained with ≥99% ee. Applications to syntheses of important chiral building blocks, such as the Taniguchi lactone and dimethyl 2-vinylcyclopropane-1,1 -dicarboxylate, are presented.
描述了 Ir 催化的不对称烯丙基烷基化反应的简化程序,通常允许获得≥99% ee 的取代产物。介绍了重要手性构件的合成应用,如谷口内酯和 2-乙烯基环丙烷-1,1-二羧酸二甲酯。
First chemo-enzymatic synthesis of the (R)-Taniguchi lactone and substrate profiles of CAMO and OTEMO, two new Baeyer–Villiger monooxygenases
作者:Florian Rudroff、Michael J. Fink、Ramana Pydi、Uwe T. Bornscheuer、Marko D. Mihovilovic
DOI:10.1007/s00706-016-1873-9
日期:2017.1
terpenones and bicyclic ketones, as well as kinetic resolution of racemic cycloketones. We demonstrated the applicability of the title enzymes in the enantioselective synthesis of (R)-(-)-Taniguchi lactone, a buildingblock for the preparation of various natural product analogs such as ent-quinine. GRAPHICAL ABSTRACT:
Topical ‘dual-soft’ glucocorticoid receptor agonist for dermatology
作者:Kevin N. Dack、Patrick S. Johnson、Krister Henriksson、Stefan Eirefelt、Martin A. Carnerup、Martin Stahlhut、Anna K. Ollerstam
DOI:10.1016/j.bmcl.2020.127402
日期:2020.9
Steroidal glucocorticoids (GR agonists) have been widely used for the topical treatment of skin disorders, including atopic dermatitis. They are a very effective therapy, but they are associated with both unwanted local effects in the skin (skin thinning/atrophy) and systemic sideeffects. These effects can limit the long-term utility of potentsteroids. Here we report on a topically delivered non-steroidal
[EN] NON-STEROIDAL GLUCOCORTICOID RECEPTOR MODULATORS FOR LOCAL DRUG DELIVERY<br/>[FR] MODULATEURS DES RÉCEPTEURS GLUCOCORTICOÏDES NON STÉROÏDIENS POUR ADMINISTRATION LOCALE DE MÉDICAMENTS
申请人:LEO PHARMA AS
公开号:WO2017046096A1
公开(公告)日:2017-03-23
The present invention relates to a compound according to formula (I) wherein R1 is selected from the group consisting of 5- and 6- membered heteroaryl, (C1- C6)alkyl, (C3-C6)cycloalkyl, (4-6)-membered heterocycloalkyl and phenyl; R2 is selected from (C1-C3)alkyl and halo(C1-C3)alkyl; R3 is selected from phenyl, 5-membered heteroaryl and 6-membered heteroaryl; R4 is selected from hydrogen, halogen, (C1- C4)alkyl and halo(C1-C4)alkyl; X1 is selected from CH, C(Rb) and N, X2 is selected from CH and N; Y is selected from -NH- and -O-; m is 0 or 1; n is 0 or 1; L represents a bond, -O-, -NH- or -N(RC)-; or pharmaceutically acceptable salts, hydrates, or solvates thereof. The invention relates further to intermediates for the preparation of said compounds, to said compounds for use in therapy, to pharmaceutical compositions comprising said compounds, to methods of treating diseases with said compounds, and to the use of said compounds in the manufacture of medicaments.
Diastereoselective radical cyclization of bromoacetals (Ueno-Stork reaction) controlled by the acetal center
作者:Félix Villar、Philippe Renaud
DOI:10.1016/s0040-4039(98)01971-6
日期:1998.11
The stereochemistry of the 5-exo-trig cyclization of bromoacetals (Ueno-Stork cyclization) can be controlled from the stereogenic acetal center. High stereoselectivities have been observed for the formation of 4-substituted tetrahydrofurans. Preparation of an optically pure β-substituted γ-butyrolactone by use of an easily removable chiral auxiliary is reported.