在低于室温的温度下,在氯化溶剂中用N 2 O 5处理11个在环氮上带有各种取代基的氮杂环丁烷,在某些情况下,通过类似的新型开环硝化反应,形成1,3-硝胺-硝酸盐产物。到建立氮丙啶的水平。发生开环的硝酸硝胺硝酸盐的收率通常为中到高(41–88%),但带有N-酰基取代基(乙酰基,丁酰基或氨基甲酰基)的氮杂环丁烷则进行环外取代基的硝化反应以形成N -硝基氮杂环丁烷。同样,带有强吸电子基团(如苦味酚)的氮杂环丁烷对N 2 O 5呈惰性。与氮丙啶相比,氮杂环丁烷的不同反应性是根据四元环化合物的降低的环应变来合理化的。
PYRAZOLOPYRIMIDINE JAK INHIBITOR COMPOUNDS AND METHODS
申请人:Gibbons Paul
公开号:US20120190665A1
公开(公告)日:2012-07-26
A compound of Formula I, enantiomers, diasteriomers, tautomers or pharmaceutically acceptable salts thereof, wherein R
1
, R
2
and R
3
are defined herein, are useful as inhibitors of one or more Janus kinases. A pharmaceutical composition that includes a compound of Formula I and a pharmaceutically acceptable carrier, adjuvant or vehicle, and methods of treating or lessening the severity of a disease or condition responsive to the inhibition of a Janus kinase activity in a patient are disclosed.
Catalytic Enantioselective α-Alkylation of Amides by Unactivated Alkyl Electrophiles
作者:Xiaoyu Tong、Felix Schneck、Gregory C. Fu
DOI:10.1021/jacs.2c06154
日期:2022.8.17
Carbonyl groups that bear an α stereocenter are commonly found in bioactive compounds, and intense effort has therefore been dedicated to the pursuit of stereoselective methods for constructing this motif. While the chiral auxiliary-enabled coupling of enolates with alkyl electrophiles represented groundbreaking progress in addressing this challenge, the next advance in the evolution of this enolate–alkylation
带有α立构中心的羰基常见于生物活性化合物中,因此人们一直致力于寻找构建该基序的立体选择性方法。虽然烯醇化物与烷基亲电子试剂的手性辅助偶联代表了解决这一挑战的突破性进展,但这种烯醇化物烷基化方法的下一个进展将是使用手性催化剂来控制立体化学。在此,我们描述了这一目标的实现,证明镍催化剂可以实现外消旋Reformatsky试剂与未活化的亲电子试剂的对映选择性分子间烷基化;所得到的α-烷基化羰基化合物可以通过一个额外的步骤转化为一系列广泛存在的手性分子家族。通过应用广泛的机械工具,我们深入了解了催化循环的关键中间体(包括烷基镍 (II) 静息态)和基本步骤。
SUBSTITUTED AZASPIRO(4.5)DECANE DERIVATIVES
申请人:Grünenthal GmbH
公开号:EP3169666B1
公开(公告)日:2018-06-06
Substituted Azaspiro(4.5)Decane Derivatives
申请人:Gruenenthal GmbH
公开号:US20170210734A1
公开(公告)日:2017-07-27
The invention relates to substituted spirocyclic cyclohexane derivatives which have an affinity for the μ opioid receptor and/or the ORL1 receptor, processes for the preparation thereof, medicaments containing these compounds and the use of these compounds for the preparation of medicaments.