Cooperative Photoredox and Cobalt‐Catalyzed Acceptorless Dehydrogenative Functionalization of Cyclopropylamides towards Allylic N,O‐Acyl‐acetal Derivatives
摘要:
We disclose herein a novel photoredox and cobalt co‐catalyzed ring‐opening/acceptorless dehydrogenative functionalization of mono‐donor cyclopropanes, which providing a sustainable and atom‐economic approach to rapidly assemble a wide range of allylic N,O‐acyl‐acetal derivatives. The optimized conditions accommodate assorted cycloalkylamides and primary, secondary and tertiary alcohols, with applications in late‐stage functionalization of pharmaceutically relevant compounds, stimulating the further utility in medicinal chemistry. Moreover, selective nucleophilic substitutions with various carbon nucleophiles were succeed in a one‐pot fashion, offering a reliable avenue to access some cyclic and acyclic derivatives.
[EN] NOVEL COMPOUNDS AND PHARMACEUTICAL COMPOSITIONS THEREOF FOR THE TREATMENT OF HEPATITIS B<br/>[FR] NOUVEAUX COMPOSÉS ET COMPOSITIONS PHARMACEUTIQUES DE CEUX-CI POUR LE TRAITEMENT DE L'HÉPATITE B
申请人:GALAPAGOS NV
公开号:WO2020239656A1
公开(公告)日:2020-12-03
The present invention discloses compounds according to Formula (I), wherein X, G, R1, R2a, R2b, R3, R4, and R5 are as defined herein. The present invention relates to compounds, methods for their production, pharmaceutical compositions comprising the same, and methods of treatment using the same, for the prophylaxis and/or treatment of diseases involving hepatitis B by administering the compound of the invention.
Fluoroalkyl-Substituted Cyclopropane Derivatives: Synthesis and Physicochemical Properties
作者:Anton V. Chernykh、Oleksandr S. Olifir、Yuliya O. Kuchkovska、Dmitriy M. Volochnyuk、Vladimir S. Yarmolchuk、Oleksandr O. Grygorenko
DOI:10.1021/acs.joc.0c01848
日期:2020.10.2
for the obtained compounds or their derivatives to evaluate the influence of the type and relative position of fluoroalkyl substituents on the acidity and lipophilicity of monofunctionalized cyclopropanes. An analysis of the selected products by X-ray crystallography was carried out to obtain a better insight into the observed differences in physicochemicalproperties.
用不同的方法以克数级合成了一系列带有CH 2 F,CHF 2和CF 3取代基的全部12种顺式和反式环丙烷羧酸和环丙胺。测量获得的化合物或其衍生物的解离常数(p K a)和log P值,以评估氟代烷基取代基的类型和相对位置对单官能化环丙烷的酸度和亲脂性的影响。通过X射线晶体学对所选产品进行了分析,以更好地了解所观察到的理化性质差异。
Deamination of <i>trans</i>-2-Methyl- and <i>trans</i>-2-Phenylcyclopropylamines
作者:Kenneth B. Wiberg、Carmen G. Österle
DOI:10.1021/jo9906532
日期:1999.10.1
The deaminations of trans-2-methyl- and 2-phenylcyclopropylamine hydrochlorides in acetic acid solution have been examined. A major product in each case was an allylic chloride, and the amount of chlorides increased when the chloride ion concentration was increased, With the methyl-substituted amine, increasing the chloride ion concentration changed the major chloride product from crotyl chloride to methallyl chloride. The addition of lithium perchlorate led to a reduction in the amount of chlorides formed. These results indicate that an ion pair is involved in the reaction. The deamination of the related open chain amines gave only small amounts of chlorides, B3LYP/6-31G* calculations found cyclopropyldazonium chloride to prefer to have the chloride ion over the cyclopropyl ring. The transition state was located, and when followed down to products, allyl chloride was found. Similar calculations for the methyl-substituted series led to crotyl chloride from the ion pair with one chloride ion and to methallyl chloride from the ion-tripler with two chloride ions. The deaminations of the corresponding nitrosoureas in basic methanol also were studied. The products were the expected ethers. The addition of azide ion led to azides that were largely formed by initial reaction with the diazonium ion to give a pentazene that lost nitrogen to give the azide. However, some of the azide was formed by an S(N)2 displacement.