Asymmetric Synthesis of syn- and anti-1,3-Amino Alcohols
摘要:
The first application of metalloenamines derived from N-sulfinyl imines is reported for the highly diastereoselective addition to aldehydes. Reduction of the beta-hydroxy-N-sulfinyl imine products with catecholborane and LiBHEt3 provides syn- and anti-1,3-amino alcohol derivatives, respectively, with very high diastereomeric ratios.
A General Method for the Preparation of <i>N</i>-Sulfonyl Aldimines and Ketimines
作者:José Luis García Ruano、José Alemán、M. Belén Cid、Alejandro Parra
DOI:10.1021/ol048005e
日期:2005.1.1
[Reaction: see text] A simple procedure to obtain N-sulfonylimines involving the condensation of carbonyl compounds with p-tolyl or tert-butyl sulfinamides followed by oxidation with m-CPBA of the resulting N-sulfinylimines is reported. The method is applicable to aldehydes (aliphatics and aromatics) and ketones (diaryl, dialkyl, and aryl alkyl), even those containing enolizable protons. It also does
Highly enantioselective Rh-catalyzed transfer hydrogenation of N-sulfonyl ketimines
作者:Se Hun Kwak、Sun Ah Lee、Kee-In Lee
DOI:10.1016/j.tetasy.2010.04.047
日期:2010.4
species comprising N-sulfinyl and N-sulfonyl ketimine, oxime, and enamine derivatives were subjected to asymmetric transferhydrogenation in an azeotropic mixture of formic acid/triethylamine. Among them, the Rh-catalyzed transferhydrogenation of N-sulfonyl ketimine afforded the corresponding 1-arylalkylamines in excellent yield and with high enantioselectivity.
Pd‐Catalyzed Asymmetric Allylic Substitution Annulation Using Enolizable Ketimines as Nucleophiles: An Alternative Approach to Chiral Tetrahydroindoles
A synthesis of chiral tetrahydroindoles has been developed via a Pd‐catalyzed asymmetricallylicsubstitution annulation using unstable enolizable ketimines as nucleophiles and our previously developed tBu‐RuPHOX as a chiral ligand. The reaction proceeds via an asymmetric desymmetrization of the meso‐diacetatecycloalkenes, providing the desired chiral tetrahydroindoles in moderate to good yields and
[EN] CYCLIC UREA INHIBITORS OF 11ß -HYDROXYSTEROID DEHYDROGENASE 1<br/>[FR] INHIBITEURS DE L'URÉE CYCLIQUE DE LA 11?-HYDROXYSTÉROÏDE DÉSHYDROGÉNASE 1
申请人:VITAE PHARMACEUTICALS INC
公开号:WO2009061498A1
公开(公告)日:2009-05-14
This invention relates to novel compounds of the Formula (I), (Ia), (Ib), (Ic), (Id), (Ie), (If), (Ig), (Ih)1 (Ij), (Ik), (II1-3). (Im1-3), (In1-3), (lo1-2), (Ip1-6), (Iq1-6), (Ir1-6) and (Is1-2), pharmaceutically acceptable salts thereof, and pharmaceutical compositions thereof, which are useful for the therapeutic treatment of diseases associated with the modulation or inhibition of 11 β-HSD1 in mammals. The invention further relates to pharmaceutical compositions of the novel compounds and methods for their use in the reduction or control of the production of Cortisol in a cell or the inhibition of the conversion of cortisone to cortisol in a cell.
Ring-Opening of<i>N-tert</i>-Butanesulfinylethynylaziridines with Lithium Tris(dimethylphenylsilyl)zincate: Stereoselective Access to 4-Amino-1-allenylsilanes
作者:Valentin N. Bochatay、Youssouf Sanogo、Fabrice Chemla、Franck Ferreira、Olivier Jackowski、Alejandro Pérez-Luna
DOI:10.1002/adsc.201500347
日期:2015.9.14
N‐tert‐butanesulfinylethynylaziridines with lithiumtris(dimethylphenylsilyl)zincate is reported. The reaction is demonstrated to be both stereoselective and stereospecific and to proceed through an anti‐SN2′ process. Further deprotection of the nitrogen atom under mild conditions allows access to 4‐amino‐1‐(dimethylphenylsilyl)allenes with high yields and levels of stereoselectivity.
据报道,N-叔丁烷亚磺酰基乙炔基氮丙啶与三(二甲基苯基甲硅烷基)锌酸锂开环。该反应被证明既具有立体选择性也具有立体特异性,并且会通过抗-S N 2'过程进行。在温和条件下对氮原子进行进一步的脱保护,可以以高收率和立体选择性的水平获得4-氨基-1-(二甲基苯基甲硅烷基)丙烯。