我们报告了在可见光照射下使用 Ir 光催化剂对 N-羟基邻苯二甲酰亚胺酯进行亲核氟化的氧化还原中性方法。该方法提供了获得广泛的脂肪族氟化物的途径,包括伯、仲和叔苄基氟化物以及未活化的叔氟化物,由于竞争消除,这些氟化物通常无法通过亲核氟化获得。此外,我们表明脱羧氟化条件很容易适应 [18F]KF 的放射性氟化。我们建议反应通过 Ir 催化剂和氧化还原活性酯底物之间的两次电子转移进行,以提供碳阳离子中间体,随后被氟化物捕获。
Direct and Chemoselective Electrophilic Monofluoromethylation of Heteroatoms (<i>O</i>-, <i>S-</i>, <i>N</i>-, <i>P</i>-, <i>Se</i>-) with Fluoroiodomethane
作者:Raffaele Senatore、Monika Malik、Markus Spreitzer、Wolfgang Holzer、Vittorio Pace
DOI:10.1021/acs.orglett.9b04654
日期:2020.2.21
The commercially available fluoroiodomethane represents a valuable and effective electrophilic source for transferring the CH2F unit to a series of heteroatom-centered nucleophiles under mild basic conditions. The excellent manipulability offered by its liquid physical state (bp 53.4 °C) enables practical and straightforward one-step nucleophilic substitutions to retain the chiral information embodied
Bunte Salt CH<sub>2</sub>FSSO<sub>3</sub>Na: An Efficient and Odorless Reagent for Monofluoromethylthiolation
作者:Fanmin Liu、Lvqi Jiang、Huangyao Qiu、Wenbin Yi
DOI:10.1021/acs.orglett.8b02753
日期:2018.10.5
A practical and efficient monofluoromethylthiolation that employs the typical Bunte salt, sodium S-(fluoromethyl) sulfurothioate, as the sulfur source is described. This reagent reacts readily with a variety of aryl amines and aryl thiols. The high tolerance of functional groups demonstrates the potential of this reaction. In addition, this method is suitable for the late-stage monofluoromethylthiolation
Direct monofluoromethylation of O-, S-, N-, and P-nucleophiles with PhSO(NTs)CH<sub>2</sub>F: the accelerating effect of α-fluorine substitution
作者:Xiao Shen、Min Zhou、Chuanfa Ni、Wei Zhang、Jinbo Hu
DOI:10.1039/c3sc51831k
日期:——
An efficient and direct monofluoromethylation of O-, S-, N-, and P-nucleophiles with PhSO(NTs)CH2F 1 has been developed. In contrast to the previously known detrimental effect of α-fluorine substitution on SN2 reactions, the current monofluoromethylation is accelerated by the α-fluorine substitution. Based on a mechanistic study, a new reactivity of sulfoximine (as a radical monofluoromethylation reagent) is disclosed.
<scp>Monofluoromethyl‐Substituted</scp>
Sulfonium Ylides: Preparation,
<scp>Structure‐Reactivity</scp>
Study and Substrate Scope
<sup>†</sup>
作者:Xin Hong、Yafei Liu、Long Lu、Qilong Shen
DOI:10.1002/cjoc.202000206
日期:2020.11
Structure‐reactivity study of a family of electrophilic monofluoromethylating reagents based on sulfonium ylide skeleton with different steric hindrance and electron‐withdrawing properties was described. These studies led us to discover two highly reactive reagents 3 with a cyclic malonate backbone and 6 with an electron‐poor 1,1,1,5,5,5‐hexafluoropentane‐2,4‐dione backbone. The high reactivity of reagent
[EN] CYCLOALKYLNITRILE PYRAZOLE CARBOXAMIDES AS JANUS KINASE INHIBITORS<br/>[FR] CYCLOALKYLNITRILE PYRAZOLE CARBOXAMIDES EN TANT QU'INHIBITEURS DE JANUS KINASE
申请人:MERCK SHARP & DOHME
公开号:WO2013040863A1
公开(公告)日:2013-03-28
Cycloalkylnitrile pyrazole carboxamides as JAK inhibitors useful for the treatment of JAK-mediated diseases such as rheumatoid arthritis, asthma, COPD and cancer are provided.