Improved synthesis of glycosylamines and a straightforward preparation of N-acylglycosylamines as carbohydrate-based detergents
作者:André Lubineau、Jacques Augé、Bruno Drouillat
DOI:10.1016/0008-6215(94)00275-k
日期:1995.1
glycosylamine when treated at 42 degrees C for 36 h with a commercial aqueous solution of ammonia in the presence of one equivalent of ammoniumhydrogen carbonate. After lyophilisation, the residue (i.e., the pure glucosylamine) was dissolved in a mixture of ethanol and water, and treated with acyl chlorides to afford in a few minutes N-acylglucosylamines. Micellar properties of these amphiphilic derivatives
Protected glycosyl azides react with acyl chlorides in the presence of triphenylphosphine to afford glycosylamides in high yields, at room temperature. Starting from the beta-glycosyl azides, the reaction is highly stereoselective and occurs with retention of configuration, whereas the alpha-azido anomers display a lower stereoselectivity giving rise to alpha/beta mixtures of glycosylamides. The reaction
Procécé de préparation de glycosylamines à partir de sucres réducteurs
申请人:ERIDANIA BEGHIN-SAY
公开号:EP0601897A1
公开(公告)日:1994-06-15
L'invention concerne un nouveau procédé de préparation de glycosylamines à partir de sucres réducteurs.
Ce procédé consiste à faire réagir le sucre réducteur avec une solution contenant de l'ammoniaque et du bicarbonate d'ammonium.
L'invention concerne également l'utilisation des glycosylamines formées comme intermédiaires de synthèse.
Sterilization by treatment with reductant and oxidant.
申请人:B-K Medical ApS
公开号:EP2123308A1
公开(公告)日:2009-11-25
The present invention relates to the field of sterilization of items that are sensitive to e.g. temperature, pH, positive or negative pressure, radiation or oxidation. More particularly, the invention concerns a method, the use of this method and an apparatus for sterilization or disinfection, comprising the steps of contacting one or more item or part of an item with a water-based fluid comprising at least one reductant, followed by the step of contacting with a gas having oxidative properties in a substantially water-free environment. According to the invention, items can be sterilized that are otherwise impaired by conventional sterilization procedures, such as laboratory items, medical items, dental items, military items, biological items, and food processing-related items.
ANALOGS OF UDP-MURNAC PEPTIDES, ASSAYS, KITS AND RELATED METHODS OF THEIR USE
申请人:——
公开号:US20010049117A1
公开(公告)日:2001-12-06
General compositions and methods for detecting Lipid I, Lipid II and peptidoglycan synthesis is disclosed. A method of screening for potential antibacterial agents is provided which requires bacterial membrane preparations or enriched enzyme preparations including at least one bacterial enzyme involved in the synthesis of Lipid I from UDP-MurNAc pentapeptide and undecaprenyl phosphate, at least one bacterial enzyme involved in the synthesis of Lipid II from Lipid I and UDP-GlcNAc and one or more bacterial enzymes involved in the further processing of Lipid II toward the downstream synthesis of peptidoglycan. The methods disclosed herein further provides a labeled UDP-MurNAc-peptide capable of serving as a substrate for a bacterial enzyme involved in the synthesis of Lipid I and a labeled UDP-GlcNAc capable of serving as a substrate for a bacterial enzyme involved in the synthesis of Lipid II. Conditions for further processing of Lipid II toward the downstream synthesis of peptidoglycan are also discribed.
公开了检测脂质 I、脂质 II 和肽聚糖合成的一般组合物和方法。本发明提供了一种筛选潜在抗菌剂的方法,该方法需要细菌膜制剂或富集酶制剂,包括至少一种参与由 UDP-MurNAc 五肽和十一烯丙基磷酸合成脂质 I 的细菌酶,至少一种参与由脂质 I 和 UDP-GlcNAc 合成脂质 II 的细菌酶,以及一种或多种参与脂质 II 向下游合成肽聚糖的进一步加工的细菌酶。本文公开的方法进一步提供了一种可作为参与脂质 I 合成的细菌酶底物的标记 UDP-MurNAc-肽和一种可作为参与脂质 II 合成的细菌酶底物的标记 UDP-GlcNAc。此外,还介绍了进一步加工脂质 II 以在下游合成肽聚糖的条件。