Synthesis of Indole-3-carboxylic Acid Derivatives by Pd(0)-Catalyzed Intramolecular α-Arylation of β-(2-Iodoanilino) Esters
摘要:
beta-(2-Iodoanilino) esters undergo intramolecular alpha-arylation in the presence of Pd(PPh3)(4) and potassium phenoxide. The reaction is a useful methodology for the preparation of indole-3-carboxylic acid ester derivatives.
Copper-Catalyzed Aza-Michael Addition of Aromatic Amines or Aromatic Aza-Heterocycles to α,β-Unsaturated Olefins
作者:Seongcheol Kim、Seongil Kang、Gihyeon Kim、Yunmi Lee
DOI:10.1021/acs.joc.6b00341
日期:2016.5.20
A highly efficient and mild Cu-catalyzed conjugate addition reaction of aromaticamines and aromatic aza-heterocycles to α,β-unsaturated olefins is described. The transformation is promoted by 3–7 mol % of a Cu complex generated in situ from a mixture of inexpensive CuCl, a readily available phosphine or imidazolium salt, and KOt-Bu at ambient temperature. A wide range of β-amino sulfone, β-amino nitrile
描述了芳族胺和芳族氮杂杂环对α,β-不饱和烯烃的高效且温和的Cu催化的共轭加成反应。在环境温度下,由廉价的CuCl,易得的膦或咪唑鎓盐和KO t -Bu的混合物原位生成的3–7 mol%的Cu络合物促进了这种转变。可以高效,有选择地合成大量β-氨基砜,β-氨基腈和β-氨基羰基化合物(62–99%)。
β-Cyclodextrin promoted aza-Michael addition of amines to conjugated alkenes in water
Highly efficient and environmentally benign aza-Michaeladditions of amines to α,β-unsaturated compounds catalyzed by β-cyclodextrin in water to produce the corresponding β-amino compounds in excellent yields under mild conditions are described. β-Cyclodextrin can be recovered and reused in subsequent reactions without loss of activity.
Use of a scientific microwave apparatus for rapid optimization of reaction conditions in a monomode function and then substrate screening in a multimode function
作者:Nicholas E. Leadbeater、Jason R. Schmink
DOI:10.1016/j.tet.2007.04.074
日期:2007.7
multimode microwave device. We have assessed the applicability of the apparatus toward rapid optimization of reaction conditions in a monomode function and then substrate screening in a multimode function. We have also probed the effects of differences in microwave absorptivity of reaction mixtures on the product conversions in screening multiple substrates simultaneously in a multimode microwave apparatus
The hydroamination of electron-deficient olefins was carried out using the (CAAC)Cu–Cl (CAAC = cyclic (alkyl)(amino)carbene) catalyst with an excellent yield at room temperature and under an open atmosphere. Furthermore, the catalyst shows excellent efficiency in the hydroaryloxylation and hydroalkoxylation of alkenes under mild conditions. The efficiency of the catalyst was tested for a wide range
使用 (CAAC)Cu-Cl(CAAC = 环状(烷基)(氨基)卡宾)催化剂对缺电子烯烃进行加氢胺化,在室温和开放气氛下具有优异的收率。此外,该催化剂在温和条件下对烯烃进行加氢芳氧基化和加氢烷氧基化反应时表现出优异的效率。针对具有不同电子和空间功能的各种底物测试了催化剂的效率。已经进行了详细的计算研究以了解这些 Cu( I ) 催化反应的机理,结果表明反应通过包含铜离子的四元或六元循环过渡态进行。
SUBSTITUTED SULFONAMIDOPROPIONAMIDES AND METHODS OF USE