Importance of C−N Bond Rotation in <i>N</i>-Acyl Oxazolidinones in their SmI<sub>2</sub>-Promoted Coupling to Acrylamides
作者:Rolf H. Taaning、Karl B. Lindsay、Birgit Schiøtt、Kim Daasbjerg、Troels Skrydstrup
DOI:10.1021/ja903401y
日期:2009.7.29
correlates with the activation barriers for C-N bond rotation may have implications for other useful synthetic organic reactions involving similar substrates. Finally, these studies were extrapolated to understanding the poor reactivity of N-acyl oxazolidinones, as those derived from Evans chiral auxiliaries, with N-tert-butyl acrylamide. These couplings appear to be dominated by the activation energy for addition
A Convenient Method for the Conversion of <i>N</i>-Acyloxazolidinones to Hydroxamic Acids
作者:Mukund P. Sibi、Hikaru Hasegawa、Sandeep R. Ghorpade
DOI:10.1021/ol0263301
日期:2002.10.1
Treatment of N-acyloxazolidinones with hydroxylamines using samarium triflate as a Lewis acid provides the corresponding hydroxamicacids in 50-98% yields at room temperature. The conversion proceeds with high degree of chemoselectivity and without racemization of chiral centers alpha- to the acyl group. [reaction: see text]
[EN] SUBSTITUTED N-(INDOLE-2-CARBONYL)-GLYCINAMIDES AND DERIVATIVES AS GLYCOGEN PHOSPHORYLASE INHIBITORS<br/>[FR] (INDOLE-2-CARBONYL-)-GLYCINAMIDES SUBSTITUES EN N ET LEURS DERIVES, SERVANT D'INHIBITEURS DE LA GLYCOGENE PHOSPHORYLASE
申请人:PFIZER, INC.
公开号:WO1996039384A1
公开(公告)日:1996-12-12
(EN) Compounds of Formula (1) wherein R6 is carboxy, (C1-C8)alkoxycarbonyl, benzyloxycarbonyl, C(O)NR8R9 or C(O)R12 as glucogen phosphorylase inhibitors, pharmaceutical compositions containing such inhibitors and the use of such inhibitors to treat diabetes, hyperglycemia, hypercholesterolemia, hypertension, hyperinsulinemia, hyperlipidemia, atherosclerosis and myocardial ischemia in mammals.(FR) L'invention concerne des composés de formule (1) où R6 représente carboxy, alcoxycarbonyle (C1-C8), benzyloxycarbonyle, C(O)NR8R9 ou C(O)R12, servant d'inhibiteurs de la glycogène phosphorylase, ainsi que des compositions pharmaceutiques contenant ces inhibiteurs. L'invention concerne également l'utilisation de ces inhibiteurs pour le traitement du diabète, de l'hyperglycémie, de l'hypercholestérolémie, de l'hypertension, de l'hyperinsulinémie, de l'hyperlipidémie, de l'athérosclérose et de l'ischème myocardiaque chez les mammifères.
Facile Formation of <i>N</i>-Acyl-oxazolidinone Derivatives Using Acid Fluorides
作者:Corinna S. Schindler、Patrik M. Forster、Erick M. Carreira
DOI:10.1021/ol1016977
日期:2010.9.17
A mild method is presented for the formation of N-acylated oxazolidinones that employs acid fluorides and mild bases, such as (i)Pr(2)NEt and NEt(3). Optimized reaction conditions for two types of substrates have been developed utilizing either the oxazolidinone itself or the corresponding in situ generated O-silyloxazolidinones resulting in the formation of the desired N-acylated products in high yields of up to 98%.
Process for the preparation of substituted N-(indole-2-carbonyl)- glycinamides