Radiosynthesis and Preclinical Evaluation of an 18F-Labeled Triazolopyridopyrazine-Based Inhibitor for Neuroimaging of the Phosphodiesterase 2A (PDE2A)
有效地按比例放大合成5-氰基-2-甲酰基苯甲酸或其环状异构体6-氰基-3-羟基-2-苯并呋喃-1(3 H)-一(1)作为各种生物学上重要的化合物的关键中间体通过使用流动微反应器的连续流动闪蒸化学方法,从2-溴-5-氰基苯甲酸异丙酯(8c)中获得了上述化合物。结果发现,在-50℃下,带有碳异丙氧基和氰基的8c与BuLi的Br / Li交换反应在0.1 s内发生,所得高反应性芳基锂中间体与DMF甲酰化,得到1,这是通过常规批处理过程很难实现的。连续流动闪蒸反应条件的优化和反应体系的改进导致在270分钟内从897 g 8c生成237 g 1。结果表明,通过使用流动微反应器的流动闪蒸化学,可以从相应的2-溴苯甲酸酯方便地合成带有亲电基团的邻苯二酸衍生物。
Room Temperature Cu-Catalyzed <i>N</i>-Arylation of Oxazolidinones and Amides with (Hetero)Aryl Iodides
作者:Subhajit Bhunia、Subhadip De、Dawei Ma
DOI:10.1021/acs.orglett.2c00122
日期:2022.2.11
an apposite promoter for the Cu-catalyzed N-arylation of oxazolidinones and primary and secondary amides with (hetero)aryliodides at room temperature. Excellent chemoselectivity reached between aryliodides and arylbromides, and a wide range of functional groups tolerated the reaction conditions, which led to the formation of greatly diverse N-arylation products.
N , N '-Bis(pyridin-2-ylmethyl)oxalamide (BPMO) 被发现是 Cu 催化的恶唑烷酮和伯胺和仲胺在室温下与(杂)芳基碘化物的N-芳基化的合适促进剂。芳基碘化物和芳基溴化物之间达到了优异的化学选择性,并且广泛的官能团可以耐受反应条件,从而导致形成多种多样的N-芳基化产物。
Chemoselective Copper-Catalyzed Ullmann-Type Coupling of Oxazolidinones with Bromoiodoarenes
作者:Sean M. Kelly、Chong Han、Laura Tung、Francis Gosselin
DOI:10.1021/acs.orglett.7b01304
日期:2017.6.2
We describe the highly selective copper-catalyzedUllmann-type coupling of bromoiodoarenes with oxazolidinones. 3,4,7,8-Tetramethyl-1,10-phenanthroline (Me4Phen) was identified as an optimal ligand promoting the desired C–N bondformation, while minimizing the competitive bromo–iodo exchange pathway that leads to formation of iodo-substituted and bis-coupled side products. The developed method is highly
The invention relates inter alia to compounds of the general formula (I)
in which the A
1
-A
4
, T, n, W, Q, R
1
and B
1
-B
4
radicals are each as defined in the description. Also described are processes for preparing the compounds of the formula (I). The inventive compounds are especially suitable for controlling insects, arachnids and nematodes in agriculture, and ectoparasites in veterinary medicine.
The invention relates to antiparasitic combinations comprising inter alia to compounds of the general formula (I) in which the A1-A4, T, n, W, Q, R1 and B1 -B4 radicals are each as defined in the description. Also described are processes for preparing the compounds of the formula (I). The combinations further comprise ectoparasiciticides, anthelmintics or anti-protozoal agents. The combinations are especially suitable for controlling ectoparasites, helminths and/or protozoa on or in animals.
The invention relates inter alia to compounds of the general formula (I)
in which the A1-A4, T, n, W, Q, R1 and B1-B4 radicals are each as defined in the description. Also described are processes for preparing the compounds of the formula (I). The inventive compounds are especially suitable for controlling insects, arachnids and nematodes in agriculture, and ectoparasites in veterinary medicine.