Copper-catalysed amination of alkyl iodides enabled by halogen-atom transfer
作者:Bartosz Górski、Anne-Laure Barthelemy、James J. Douglas、Fabio Juliá、Daniele Leonori
DOI:10.1038/s41929-021-00652-8
日期:——
the fact that nucleophilic displacement (SN2) of alkyl halides with nitrogen nucleophiles is one of the first reactions introduced in organic chemistry teaching, its practical utilization is largely limited to unhindered (primary) or activated (α-carbonyl, benzylic) substrates. Here, we demonstrate an alternative amination strategy where alkyliodides are used as radical precursors instead of electrophiles
尽管卤代烷与氮亲核试剂的亲核置换 (S N 2) 是有机化学教学中最早引入的反应之一,但其实际应用在很大程度上仅限于不受阻碍的(初级)或活化的(α-羰基、苄基)底物. 在这里,我们展示了一种替代胺化策略,其中烷基碘被用作自由基前体而不是亲电子试剂。使用 α-氨基烷基自由基可以通过卤素原子转移将碘化物有效地转化为相应的烷基自由基,而铜催化在室温下组装sp 3 C-N 键。该过程提供 S N2 样的可编程性以及在几种密集功能化药物的后期功能化中的应用证明了其在制备有价值的N-烷基化药物类似物方面的实用性。
Silver Fluoride Supported on Calcium Fluoride. Improved Fluorination and Halofluorination Reactions
作者:Takashi Ando、David G. Cork、Mitsue Fujita、Takahide Kimura、Toshio Tatsuno
DOI:10.1246/cl.1988.1877
日期:1988.11.5
Silverfluoride dispersed on the surface of calcium fluoride shows improved fluoride nucleophilicity for halogenexchange and addition to alkenes.
分散在氟化钙表面的氟化银显示出改善的氟化物亲核性,用于卤素交换和烯烃加成。
One-Pot Formal Carboradiofluorination of Alkenes: A Toolkit for Positron Emission Tomography Imaging Probe Development
作者:Mónica Rivas、Sashi Debnath、Sachin Giri、Yusuf M. Noffel、Xiankai Sun、Vladimir Gevorgyan
DOI:10.1021/jacs.3c04548
日期:2023.9.6
accessible alkenes as both prosthetic group precursors and coupling partners. The methodology features rapid sequential Markovnikov-selective iodofluorination and photoinduced Pd(0/I/II)-catalyzed alkyl Heck reaction as a mild and robust fluorine-18 (18F) radiochemical approach for positron emission tomography (PET) imaging probe development. A new class of prosthetic groups for PET imaging probe synthesis
我们报告了第一个一锅正式烯烃碳硼氟化反应,采用易于获得的烯烃作为辅基前体和偶联伙伴。该方法的特点是快速连续马尔可夫尼科夫选择性碘氟化和光诱导 Pd(0/I/II) 催化烷基 Heck 反应,作为一种温和且稳定的氟 18 ( 18 F) 放射化学方法,用于正电子发射断层扫描 (PET) 成像探针的开发。用于 PET 成像探针合成的一类新型辅基以碘氟化中间体的形式分离出来,产率中等至优异。进行一锅正式烯基氟化反应,生成了 30 多种多种生物活性分子的类似物。通过富电子烯烃的直接碳(放射性)氟化,说明了 Pd(0/I/II) 歧管在 PET 探针开发中的进一步应用。这些方法已成功转化为放射性标记广泛的医学相关小分子,放射化学转化总体良好。该协议经过进一步优化,以适应无载体添加的条件,并为未来(前)临床翻译提供类似的效率。此外,辅基的放射合成在放射化学模块中实现自动化,以促进其在多步放射化学反应中的实际应用。
METHOD FOR PRODUCING FLUORINATED IODINATED ORGANIC COMPOUND
申请人:DAIKIN INDUSTRIES, LTD.
公开号:EP3967673A1
公开(公告)日:2022-03-16
The present disclosure addresses the problem of providing a novel method for producing a fluorinated iodinated organic compound.
The problem can be solved by a method for producing a fluorinated iodinated organic compound, comprising reacting a compound represented by formula (1):
wherein R1 and R2 are each independently a hydrogen atom, a halogen atom, or an organic group, or R1 and R2 optionally form a ring together with the two adjacent carbon atoms; and n is 1 or 2, with a fluorine source, an iodine source, and an oxidizing agent or radical generator to add fluorine and iodine to the double bond or triple bond.