Cu-Catalyzed Three-Component Carboamination of Alkenes
作者:Samuel N. Gockel、Travis L. Buchanan、Kami L. Hull
DOI:10.1021/jacs.7b10529
日期:2018.1.10
with 42 examples. Electron rich, electron poor, and internal styrenes, as well as α-olefins, are functionalized with α-halocarbonyls and aryl or aliphatic amines. Mechanistic investigations suggest the reaction is proceeding through addition of a carbon-centered radical across an olefin followed by oxidation to form a 5-membered oxocarbenium intermediate and subsequent nucleophilic ring opening to forge
Correction to “Cu-Catalyzed Three-Component Carboamination of Alkenes”
作者:Samuel N. Gockel、Travis L. Buchanan、Kami L. Hull
DOI:10.1021/jacs.1c03077
日期:2021.4.21
Information document that reflects these corrections is also available. 1 (2.0 equiv), alkene (1.0 equiv), amine (1.0 equiv), K3PO4 (1.1 equiv), Cu(OTf)2 (5 mol %), bpy (5 mol %), DCE (0.50 M), 80 °C. With 3.0 equiv alkene. See Table 1 for conditions. TPEN as ligand. PMDTA as ligand. DPEPA as ligand. PEPA as ligand. With 1.0 equiv bromide and 5.0 equiv alkene. 2.5:1 d.r. BPY as ligand. 2:1 d.r. 10:1
第59和60页。我们在出版物的化合物分析中发现了一个错误,该出版物详细介绍了烯烃的三组分碳氨基化作用。第59页的结构2d,2o,2p和2x以及第60页的2ab–2aj,2an和2ao的特征被误认为是所示的γ-内酰胺。这些结构实际上是相应的亚氨基内酯。下面提供了修订的表1-3和等式4,包括2an和2ao的更新的立体化学分配。还提供了反映这些更正的修订版《支持信息》文档。 1(2.0当量),烯烃(1.0当量),胺(1.0当量),K 3 PO 4(1.1当量),Cu(OTf)2(5 mol%),bpy(5 mol%),DCE(0.50 M) ,80°C。与3.0当量的烯烃。条件请参见表1。TPEN作为配体。PMDTA作为配体。DPEPA作为配体。PEPA作为配体。具有1.0当量的溴化物和5.0当量的烯烃。2.5:1 BPY博士作为配体。2:1博士10:1博士关于配体结构,请参见SI。有关实验的详
Lithium- α-lithioacetate and β-lithiopropionate: useful intermediates in organic synthesis
作者:Isidro M Pastor、Miguel Yus
DOI:10.1016/s0040-4039(00)00794-2
日期:2000.7
The reaction of chloroacetic acid and 3-chloropropionic acid with a base (LDA or BunLi, respectively) and then with an excess of lithium and a catalytic amount of 4,4′-di-tert-butylbiphenyl (DTBB, 5%) in the presence of different electrophiles [ButCHO, PhCHO, Et2CO, (CH2)5CO, PhCOMe] in THF at −78°C leads, after hydrolysis with water, to the expected hydroxy acids, which in the second case are directly
氯乙酸和3-氯丙酸与碱(分别为LDA或Bu n Li)的反应,然后与过量的锂和催化量的4,4'-二叔丁基联苯(DTBB,5%)反应在不同的亲电子试剂的存在下[卜吨CHO,苯甲醛,等2 CO,(CH 2)5 CO,PhCOMe]在THF中在-78℃下引线,与水水解后,与预期的羟基酸,其中在所述第二在酸性条件下,直接将其环化,得到预期的γ-内酯。
Catalytic Redox Chain Ring Opening of Lactones with Quinones To Synthesize Quinone-Containing Carboxylic Acids
作者:Xiao-Long Xu、Zhi Li
DOI:10.1021/acs.orglett.9b01672
日期:2019.7.5
Catalytic ringopening of five- to eight-membered lactones with quinones is achieved through a redox chain mechanism. With low loading of a simple metal triflate Lewis acid catalyst and a chain initiator, C–H bonds of many quinones were efficiently functionalized with carboxylic acid-containing side chains. This method also features 100% atom economy and wide substrate scope. A novel route to the anti-asthma
An abundant and low toxicity iron catalyst has enabled regioselective annulation of alkenes with α-halocarboxylic acids and their derivatives. The reaction proceeds smoothly without any additional ligands, bases, and additives to afford a variety of γ-lactones in good yields. A proposed reaction pathway through radical annulation is supported by some mechanistic studies, involving radical clock and