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作者:Wei Zhang , Georgia Pugh
来源:[J].Tetrahedron(IF 2.803), 2003, Vol.59 (17), pp.3009-3018
摘要:Abstract(#br)A general method to construct a variety of nitrogen heterocycles is introduced. 2-Bromobenzoic acids or acid chlorides are used as the common building blocks to couple with appropriate nitrogen-containing compounds. Sequential aryl radical cyclizations including conj...
作者:Shunsuke Chiba
来源:[J].Tetrahedron Letters(IF 2.397), 2016, Vol.57 (33), pp.3678-3683
摘要:... This digest focuses on the role of the stoichiometric oxidants in several copper catalyzed oxidative molecular transformations of amidine derivatives (reported since 2008) primarily for the synthesis of nitrogen heterocycles.
作者:Christopher T. Walsh
来源:[J].Tetrahedron Letters(IF 2.397), 2015, Vol.56 (23), pp.3075-3081
摘要:Abstract(#br)Nitrogen-containing heterocycles are central to the chemical reactions that occur in all organisms. The metabolic transformation of amino acids into five, six, and seven-member heterocycles reveals the chemical logic and enzymatic machinery for shunting primary metab...
作者:L. S. Vasil´ev , S. V. Baranin , I. V. Zavarzin
来源:[J].Russian Chemical Bulletin(IF 0.423), 2017, Vol.66 (8), pp.1398-1418
摘要:... The special attention is paid to the application of these boron chelates in the synthesis of nitrogen heterocycles including CF3-substituted derivatives.
作者:A. A. Prishchenko , M. V. Livantsov , O. P. Novikova ...
来源:[J].Russian Chemical Bulletin(IF 0.423), 2017, Vol.66 (2), pp.342-345
摘要:New types of (hydroxymethyl)phosphonic and (methylene)diphosphonic acids bearing heterocyclic fragments were synthesized by addition of tris(trimethylsilyl) phosphite to N -formyl derivatives of five-membered nitrogen heterocycles.
作者:Luca Banfi , Andrea Basso , Chiara Lambruschini ...
来源:[J].Chemistry of Heterocyclic Compounds(IF 0.634), 2017, Vol.53 (4), pp.382-408
摘要:This paper reviews all the syntheses of 7-membered nitrogen heterocycles that are based on the Ugi multicomponent reaction. Different systems may be obtained in a diversity-oriented manner employing three general strategies: i) intramolecular Ugi reaction; ii) Ugi reaction follow...
作者:Oleksandr O. Grygorenko
来源:[J].Tetrahedron Letters(IF 2.397), 2020, Vol.61 (12)
摘要:Abstract(#br)Approaches to α-cyanopyrrolidines, -piperidines, and -azepanes, as well as their bi- and polycyclic analogues are surveyed, which are based on Strecker reaction – intramolecular nucleophilic cyclization. The reactions are categorized according to the nature of t...
作者:B.P. Bandgar , Abasaheb V. Patil
来源:[J].Tetrahedron Letters(IF 2.397), 2006, Vol.48 (1), pp.173-176
摘要:Abstract(#br)Aryl epoxides can be opened in a regioselective and efficient manner with nitrogen heterocycles such as indoles, pyrroles and imidazoles in the presence of a catalytic amount of HBF 4 –SiO 2 under mild conditions to afford the corresponding C-alkylated derivat...
作者:Alessia Bacchi , Gian Paolo Chiusoli , Mirco Costa ...
来源:[J].Journal of Organometallic Chemistry(IF 2), 1998, Vol.562 (1), pp.35-43
摘要:... Cyclization occurs by trans -attack of oxygen or cis -attack of nitrogen functions on the triple bond, followed by stereospecific carbonylation, resulting in E or Z -stereochemistry, respectively. In the case of diacetylenic ureas condensed ring formation occurs. The trip...

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