Generation of Iminyl Copper Species from α-Azido Carbonyl Compounds and Their Catalytic C−C Bond Cleavage under an Oxygen Atmosphere
摘要:
A copper-catalyzed reaction of a-azidocarbonyl compounds under an oxygen atmosphere is reported where nitriles are formed via C C bond cleavage of a transient Iminyl copper intermediate. The transformation is carried out by a sequence of denitrogenative formation of iminyl copper species from alpha-azidocarbonyl compounds and their C C bond cleavage, where molecular oxygen (1 atm) is a prerequisite to achieve the catalytic process and one of the oxygen atoms of O-2 was found to be incorporated Into the beta-carbon fragment as a carboxylic acid.
Alkynyl containing hydroxamic acid compounds as matrix metalloproteinase and tace inhibitors
申请人:American Cyanamid Company
公开号:US06340691B1
公开(公告)日:2002-01-22
Compounds of the formula
are useful in treating disease conditions mediated by TNF-&agr;, such as rheumatoid arthritis, osteoarthritis, sepsis, AIDS, ulcerative colitis, multiple sclerosis, Crohn's disease and degenerative cartilage loss.
A method for the bromination of α‐diazo phenylacetate derivatives using cobalt(II) bromide is described. This bromination reaction features a short reaction time, broad substrate scope, operational simplicity, acid‐free conditions, and gram‐scalability.
What is disclosed are growth hormone secretagogues, and their uses, of the formula
wherein R1 is C6H5CH2OCH2—, C6H5 (CH2)3— or indol-3-ylmethyl; Y is pyrrolidin-1-yl, 4-C1-C6 alkylpiperidin-1-yl or NR2R2; R2 are each independently a C1 to C6 alkyl; R3 is 2-napthyl or phenyl para-substituted by W; W is H, F, CF3, C1-C6 alkoxy or phenyl; and R4 is H or CH3,
or a pharmaceutically acceptable salt or solvate thereof.
揭示的是生长激素促分泌素及其用途的公式,其中R1为 O —,C6H5(CH2)3—或吲哚-3-基甲基;Y为吡咯烷-1-基,4-C1-C6烷基哌啶-1-基或NR2R2;R2各自独立为C1到C6烷基;R3为2-萘基或对位由W取代的苯基;W为H,F,CF3,C1-C6烷氧基或苯基;R4为H或CH3,或其药用可接受的盐或溶剂。
Single-Step Approach toward Nitrones via Pyridinium Ylides: The DMAP-Catalyzed Reaction of Benzyl Halides with Nitrosoarenes
作者:Yeonghun Jung、Jee Eun Hong、Jae-Hwan Kwak、Yohan Park
DOI:10.1021/acs.joc.1c00158
日期:2021.5.7
single-step approach is reported for the preparation of nitrones from benzyl halides and nitrosoarenes via pyridinium ylides, utilizing 4-dimethylaminopyridine (DMAP) catalyst and mild reaction conditions (Li2CO3, dimethylacetamide, and room temperature). The reaction provides both keto- and aldonitrones in high yields with a wide scope for benzyl halides and nitrosoarenes. In the same reaction system,
据报道,采用4-二甲基氨基吡啶(DMAP)催化剂和温和的反应条件(Li 2 CO 3,二甲基乙酰胺和室温)通过吡啶鎓叶立德从苄基卤化物和亚硝基芳烃制备硝酮的一步法。该反应高产率地提供了酮-和醛基酮,并广泛用于苄基卤化物和亚硝基芳烃。在相同的反应系统中,2-甲基-2-亚硝基丙烷,其不具有的芳基,也得到相应的Ñ -叔来自具有吸电子基团的伯苄基溴化物中的-丁基硝酮。作为反应的应用,通过顺序一锅合成,使用2-溴-2-苯基乙酸甲酯制备相应的异恶唑烷。
Treatment of congestive heart failure with growth hormone secretagogues
申请人:Eli Lilly and Company
公开号:US06329342B1
公开(公告)日:2001-12-11
The present invention is directed to methods for the modulation of cardiac function which comprise the administration of certain compounds, as defined herein, having growth hormone secretagogue activity.