[EN] TUBULYSIN DERIVATIVES AND METHODS FOR PREPARING THE SAME<br/>[FR] DÉRIVÉS DE TUBULYSINE ET LEURS PROCÉDÉS DE PRÉPARATION
申请人:UNIV GRONINGEN
公开号:WO2020022892A1
公开(公告)日:2020-01-30
The invention relates to novel means and methods for the synthesis of tubulysin and derivatives thereof, which find their use e.g. as cytotoxic agents in targeted drug delivery. Provided is a method for preparing a tubulysin derivative, comprising reacting compounds A, B and C in a 3- component Passerini reaction, wherein compound A is a carboxylic acid according to the general formula (A); wherein compound B is an aldehyde according to the general formula (B); and wherein compound C is an isocyanide according to the general formula (C).
[EN] INHIBITORS OF LEUCINE RICH REPEAT KINASE 2<br/>[FR] INHIBITEURS DE LA KINASE 2 À RÉPÉTITION RICHE EN LEUCINE
申请人:GLAXOSMITHKLINE IP DEV LTD
公开号:WO2019012093A1
公开(公告)日:2019-01-17
The present invention relates to novel compounds that inhibit LRRK2 kinase activity, to processes for their preparation, to compositions containing them and to their use in the treatment of or prevention of diseases associated with or characterized by LRRK2 kinase activity, for example Parkinson's disease, Alzheimer's disease and amyotrophic lateral sclerosis (ALS).
Structure-enantioselectivity effects in 3,4-dihydropyrimido[2,1-b]benzothiazole-based isothioureas as enantioselective acylation catalysts
作者:Dorine Belmessieri、Caroline Joannesse、Philip A. Woods、Callum MacGregor、Caroline Jones、Craig D. Campbell、Craig P. Johnston、Nicolas Duguet、Carmen Concellón、Ryan A. Bragg、Andrew D. Smith
DOI:10.1039/c0ob00515k
日期:——
The catalytic activity and enantioselectivity in the kinetic resolution of (±)-1-naphthylethanol with a range of structurally related 3,4-dihydropyrimido[2,1-b]benzothiazole-based catalysts is examined. Of the isothiourea catalysts screened, (2S,3R)-2-phenyl-3-isopropyl substitution proved optimal, giving good levels of selectivity in the kinetic resolution of a number of secondary alcohols (S values up to >100 at ∼50% conversion). Low catalyst loadings (0.10–0.25 mol%) of the optimal isothiourea can be used to generate enantiopure alcohols (>99% ee) in good yields.
Ruthenium-Catalyzed Asymmetric Epoxidation of Olefins Using H2O2, Part I: Synthesis of New ChiralN,N,N-Tridentate Pybox and Pyboxazine Ligands and Their Ruthenium Complexes
The synthesis of chiral tridentate N,N,N-pyridine-2,6-bisoxazolines 3 (pybox ligands) and N,N,N-pyridine-2,6-bisoxazines 4 (pyboxazine ligands) is described in detail. These novel ligands constitute a useful toolbox for the application in asymmetric catalysis. Compounds 3 and 4 are conveniently prepared by cyclization of enantiomericallypure alpha- or beta-amino alcohols with dimethyl pyridine-2,6-dicarboximidate
Isothiourea-Catalyzed Enantioselective Carboxy Group Transfer
作者:Caroline Joannesse、Craig P. Johnston、Carmen Concellón、Carmen Simal、Douglas Philp、Andrew D. Smith
DOI:10.1002/anie.200904333
日期:2009.11.9
Transferable skills: Enantiomerically pure isothioureas promote the O‐ to C‐carboxyl grouptransfer of oxazolyl carbonates with excellent levels of enantiocontrol (see scheme). The origin of the enantioselectivity of this process was probed mechanistically and rationalized computationally.