在气相热解中的五亚甲基四唑(VIII)除去氮,得到4-戊烯基氰酰胺(IX)。后者进行1-氰基-2-甲基吡咯烷(X)的闭环。类似地,四亚甲基四唑(XII)得到3-丁烯基氰酰胺(XIII)和1-氰基吡咯烷(XIV)。三亚甲基四唑(XVI)得到氮,乙烯和化合物C 2 H 2 N 2,最有可能是N-氰基甲亚胺CH 2 = N = CN。
A Cycloaddition Approach toward the Synthesis of Substituted Indolines and Tetrahydroquinolines
作者:Albert Padwa、Michael A. Brodney、Bing Liu、Kyosuke Satake、Tianhua Wu
DOI:10.1021/jo982453g
日期:1999.5.1
acyl azide by a Curtius rearrangement in the presence of an alcohol. Alkylation of the resulting N-alkyl carbamate with an alkenyl bromide allows for the synthesis of a wide variety of cycloaddition precursors. The scope of the IMDAF reaction was evaluated by using mono- and disubstituted alkenes, electron rich and electron deficient olefins, and acetylenic tethers. Cyclic 2-amidofurans were also synthesized
Hydrogen Atom Transfer‐Mediated Domino Cyclisation Reaction to Access (Spiro)Quinazolinones
作者:Oliver J. Turner、David J. Hirst、John A. Murphy
DOI:10.1002/chem.201905712
日期:2020.3.9
A radical domino cyclisation reaction of N-cyanamide alkenes, mediated by hydrogen atom transfer (HAT) has been developed. This method, using PhSiH3 and catalytic Fe(acac)3 , allows for the synthesis of challenging (spiro)quinazolinone scaffolds from simple, tractable (hetero)aryl carboxylic acid and cyanamide building blocks.
A copper-catalyzed difluoroalkylation of an alkene/nitrile insertion/cyclization tandem sequence of N-cyanamide alkene was described, which provided a convenient synthetic approach for accessing difluorinated bicyclic amidines bearing imine moieties in a sustainable fashion. This protocol is characterized by high yields, a broad substrate scope, and good functional group compatibility. In addition
Electrochemical Trifluoromethylation/Bicyclization of <i>N</i>-Cyanamide Alkenes: Synthesis of Bicyclic Amidine Derivatives
作者:Zhi-Hua Yan、Yan Yan、Zhong-Lin Wei、Wei-Wei Liao
DOI:10.1021/acs.joc.3c02777
日期:2024.2.16
available starting materials furnished nonaromatic fused azaheterobicyclic compounds in a highly efficient and sustainable manner. The broad substrate scope, facile scalability, and sustainability enabled this electrochemical process to be an appealing complement for trifluoromethylated cyclic amidines.
报道了带有两个电子差异的烯烃部分的N-氰酰胺烯烃的阳极氧化三氟甲基化级联,其中各种N-不饱和酰基氰酰胺烯烃和CF 3 SO 2 Na作为容易获得的起始材料,以高效且可靠的方式提供非芳香族稠合氮杂双环化合物。可持续的方式。广泛的底物范围、易于扩展和可持续性使该电化学过程成为三氟甲基化环脒的有吸引力的补充。
Synthesis of Trifluoromethylated γ-Lactams through Radical Cascades of <i>N</i>-Cyano Alkenes with CF<sub>3</sub>SO<sub>2</sub>Na