Tf 2 O介导的α-酰基-β-(2-氨基吡啶基)丙烯酰胺的环化:获得N取代的4 H-吡啶基[1,2- a ]嘧啶-4-亚胺
摘要:
由三氟甲磺酸酐(Tf 2 O)介导的α-酰基-β-(2-氨基吡啶基)丙烯酰胺开发了一种N-取代的4 H-吡啶并[1,2 - a ]嘧啶-4-亚胺的简便有效的直接合成方法在2-氯吡啶存在下。该酰胺活化方案具有反应条件温和,操作简单,产率高和化学选择性高的特点,并且还可以通过实用的一锅法应用于取代的4 H-吡啶并[1,2- a ]嘧啶-4-酮的合成。程序。
A direct, one-pot and regioselective access to N-alkyl- and N-aryl-substituted 2-pyridones is described from readily available β-keto amides and either primary or secondary propargylic alcohols. This approach involves the combination of two different cooperativehomogeneous and heterogeneous catalytic systems based on a transition metal oxide and a supported organocatalyst, respectively.
Oxidation of β-Ketoamides: The Synthesis of Vicinal Tricarbonyl Amides
作者:Yueyang Liu、Zhiguo Zhang、Yameng Wan、Guisheng Zhang、Zhonglian Li、Jingjing Bi、Nana Ma、Tongxin Liu、Qingfeng Liu
DOI:10.1021/acs.joc.6b03062
日期:2017.4.7
A facile and direct oxidative reaction for the synthesis of vicinaltricarbonyl amides in moderate to excellent yields (53–88%) was developed starting from readily available β-ketoamides in the presence of phenyliodine(III) bis(trifluoroacetate). The resulting products possess significant synthetic potential, making this approach a valuable addition to the group of traditional methods already available
A highly efficient direct α-acyloxylation of 1,3-dicarbonylcompounds with carboxylic acids mediated by hypervalent iodine reagent is presented. Treatment of a variety of 1,3-dicarbonylcompounds with carboxylic acids in the presence of iodosobenzene provides the corresponding α-acyloxylated products in good to excellent yields. The mechanistic investigation by means of NMR spectroscopy reveals that
Novel compound for color-producing composition, and recording material
申请人:——
公开号:US20010044553A1
公开(公告)日:2001-11-22
A urea-urethane compound having one or more urea groups and one or more urethane groups in the molecular structure, the number of said urea groups (A) and the number of said urethane groups (B) satisfying the following numerical formula:
10≧(
A+B
)≧3
wherein each of A and B is an integer of 1 or more.
Substituted isoquinoline and isoquinolinone derivatives
申请人:PLETTENBURG Oliver
公开号:US20100105650A1
公开(公告)日:2010-04-29
The invention relates to 6-substituted isoquinoline and isochinolone derivatives of the formula (I)
useful for the treatment and/or prevention of diseases associated with Rho-kinase and/or Rho-kinase mediated phosphorylation of myosin light chain phosphatase, and compositions containing such compounds.