Copper-Catalyzed Homodimerization of Nitronates and Enolates under an Oxygen Atmosphere
摘要:
A method for copper-catalyzed oxidative dimerization of nitronates and enolates using oxygen as the terminal oxidant has been developed. Cyclization through oxidative intramolecular coupling is also feasible for both nitronates and enolates. The mild reaction conditions lead to good functional group tolerance.
Synthesis of Succinimido[3,4-b]indane and 1,2,3,4,5,6-Hexahydro-1,5-methano-3-benzazocine-2,4-dione by Sequential Alkylation and Intramolecular Arylation of Enolates Derived from <i>N,N,N</i><i>‘</i><i>N</i>‘-Tetramethylbutanediamides and <i>N,N,N</i><i>‘</i><i>N</i>‘-Tetramethylpentanediamides
作者:Sushama A. Dandekar、Stacey N. Greenwood、Thomas D. Greenwood、Stéphane Mabic、Joseph S. Merola、James M. Tanko、James F. Wolfe
DOI:10.1021/jo982000b
日期:1999.3.1
refluxing THF. Treatment of 20 with KNH(2) in liquid NH(3) led to intramolecular arylation and accompanying ammonolysis to afford trans-1-(N,N-dimethylcarboxamido)-1,2,3,4-tetrahydronaphthalene-3-carboxamide (21b). Conversion of 21b to 5 was similarly effected by means of NaH. Experiments designed to test the mechanistic aspects of the intramolecular arylations provided evidence for competing aryne and SET
Synthesis and anti-tumor activity of marine alkaloids
作者:Shiyang Zhou、Gangliang Huang、Guangying Chen
DOI:10.1016/j.bmcl.2021.128009
日期:2021.6
Marine alkaloids were divided into five categories from the perspective of anti-tumor activity. The optimization process, chemical synthesis, anti-tumor activity evaluation and structure–activity relationship of various compounds were discussed.
Catalytic Hydrogenation for Producing Amines from Carboxylic Acid Amides, Carboxylic Acid Diamides, Di-, Tri-, or Polypeptides, or Peptide Amides
申请人:Evonik Degussa GmbH
公开号:US20160272571A1
公开(公告)日:2016-09-22
The present invention relates to a process for the preparation of amines, comprising the following steps: a. reaction of a (i) carboxylic acid amide of the general formula (I), or (ii) carboxylic acid diamide of the general formula (II), or (iii) di-, tri- or polypeptide, or (iv) peptide amide with carboxy-terminal amide function with an alkylating agent, b. addition of a hydrogenation catalyst to the reaction mixture in a molar ratio of from 1:10 to 1:100 000, based on carboxylic acid amide, carboxylic acid diamide, di-, tri- or polypeptide or peptide amide, c. reaction of the reaction mixture with hydrogen, where a hydrogen pressure of from 0.1 bar to 200 bar is established and where a temperature in a range of from 0° C. to 250° C. is established.
Neutral Complexes of First Row Transition Metals Bearing Unbound Thiocyanates and Their Assembly on Metallic Surfaces
作者:Jacob W. Ciszek、Zachary K. Keane、Long Cheng、Michael P. Stewart、Lam H. Yu、Douglas Natelson、James M. Tour
DOI:10.1021/ja055459d
日期:2006.3.1
coordination complexes designed to assemble on gold surfaces was synthesized, their electronic structure and transitions analyzed, and their magnetic properties studied. By taking advantage of recently developed thiocyanate assembly protocols, these molecules were then assembled onto a gold surface, without the need for an inert atmosphere, to give a loosely packed monolayer. The assembled molecules exhibit properties
Reduction of Amides to Amines under Mild Conditions via Catalytic Hydrogenation of Amide Acetals and Imidates
作者:Renat Kadyrov
DOI:10.1002/adsc.201800855
日期:2019.1.11
A simple and general protocol was developed for selective conversion of amides into amines. Amides were converted into amide acetals and imido esters by O‐alkylation and then hydrogenated without isolation into amines under very mild reaction conditions over standard hydrogenation catalysts. Triethyloxonium tertafluoroborate, methyl trifluoromethanesulfonate, dimethyl sulfate and ethyl chloroformate