通过关键中间体3-(2,4,6-三甲基)-2-oxo-1-oxaspiro [4.4] -decyl-3-en-4设计并合成了一系列含有草酰部分的新型螺环四酸衍生物-ol。通过1 H NMR和元素分析或高分辨率质谱(HRMS)鉴定目标化合物。生物测定的结果表明,大多数目标化合物对胭脂红蜘蛛幼虫和卵具有出色的杀螨活性。特别是二异丙基氨基草酰化合物7g和哌啶草酰化合物7h分别是市售Spiromesifen对红蜘蛛卵的活性的1.4倍和2.3倍。而且,大多数目标化合物对鳞翅目害虫表现出杀虫活性。有趣的是,含有烷基氨基取代的草酰部分的化合物在红蜘蛛幼虫和卵之间显示出明显的选择性,因为对7g和7h的红蜘蛛卵的活性是对红蜘蛛幼虫的25倍,而Spiromesifen在这些活性上没有显着差异。这意味着将草酰部分引入螺环四氢苯甲酸可能会导致新的生物活性特征。
Directed Nickel-Catalyzed Diastereoselective Reductive Difunctionalization of Alkenyl Amines
作者:Lei Zhao、Xiao Meng、Yifeng Zou、Junsong Zhao、Lili Wang、Lanlan Zhang、Chao Wang
DOI:10.1021/acs.orglett.1c03210
日期:2021.11.5
directing group screening to enable olefin difunctionalization with high levels of regio-, chemo-, and diastereocontrol. This general and practical protocol is compatible with α- or β-substituted terminal alkenes and internalalkenes, providing rapid access to branched aliphatic amines bearing two skipped and vicinal stereocenters with high diastereoselectivities that would otherwise be difficult to synthesize
Metal-, Photocatalyst-, and Light-Free Direct C–H Acylation and Carbamoylation of Heterocycles
作者:Matthew T. Westwood、Claire J. C. Lamb、Daniel R. Sutherland、Ai-Lan Lee
DOI:10.1021/acs.orglett.9b02679
日期:2019.9.6
Direct C-H acylations and carbamoylations of heterocycles can now be readily achieved without requiring any conventional metal, photocatalyst, electrocatalysis, or light activation, thus significantly improving on sustainability, costs, toxicity, waste, and simplicity of the operational procedure. These mild conditions are also suitable for gram-scale reactions and late-stage functionalizations of
Pd(ii)-catalyzed decarboxylative cross-coupling of oxamic acids with potassium phenyltrifluoroborates under mild conditions
作者:Mingzong Li、Cong Wang、Ping Fang、Haibo Ge
DOI:10.1039/c1cc11635e
日期:——
A novel Pd-catalyzed decarboxylative cross-coupling of oxamic acids with potassium phenyltrifluoroborates has been realized under mild reaction conditions. This method provides an efficient access to N-mono- or N,N-disubstituted benzamides and benzoates.
Dual Hypervalent Iodine(III) Reagents and Photoredox Catalysis Enable Decarboxylative Ynonylation under Mild Conditions
作者:Hanchu Huang、Guojin Zhang、Yiyun Chen
DOI:10.1002/anie.201502369
日期:2015.6.26
combination of hypervalentiodine(III) reagents (HIR) and photoredoxcatalysis with visible light has enabled chemoselective decarboxylativeynonylation to construct ynones, ynamides, and ynoates. This ynonylation occurs effectively undermild reaction conditions at room temperature and on substrates with various sensitive and reactive functional groups. The reaction represents the first HIR/photoredox dual
The present invention relates to monosubstituted oxalic acid amides of the general formula (I)
[A]+ [O-C(O)-C(O)-X]- (I)
wherein the meaning is for
[A]+ a cation made from an organic moiety A having a formally positively charged heteroatom selected from the group consisting of nitrogen, phosphorus and sulfur and
X is the group -NRaRb, wherein Ra and Rb are the same or different and are independently from each other hydrogen or a C1 to C30 organic residue with the proviso that at least one of Ra and Rb is a C1 to C30 organic residue.