4-Azatricyclo[5.2.1.0(2,6)]dec-8-ene and its N-phenyl derivative were synthesized by reaction of endic anhydride with amines, transformation of the amido acids thus obtained to imides, and subsequent reduction of the latter with lithium aluminum hydride. The unsubstituted tricyclic amine was brought into reactions with electrophilic reagents: p-toluenesulfonyl chloride, p-toluoyl chloride, m-tolyl isocyanate, phenyl isothiocyanate, and endic anhydride to obtain a number of new derivatives; also, the corresponding salt with 1-adamantanecarboxylic acid was isolated. N-(p-Tolylsulfonyl)- and N-(m-tolylcarbamoyl)-4-azatricyclo-[5.2.1.0(2,6) ]dec-8-enes were oxidized to the corresponding 8,9-epoxy derivatives with monoperoxyphthalic acid. The structure of the products was confirmed by the data of IR, H-1 and C-13 NMR, and mass spectra. The molecular structures of N-(p-iodophenyl)bicyclo[2.2.1]hept-2-ene-endo-5,endo-6-dicarboximide and N-phenyl-4-azatricyclo[5.2.1.0(2,6)]dec-8-ene were established by X-ray analysis.
4-Azatricyclo[5.2.1.0(2,6)]dec-8-ene and its N-phenyl derivative were synthesized by reaction of endic anhydride with amines, transformation of the amido acids thus obtained to imides, and subsequent reduction of the latter with lithium aluminum hydride. The unsubstituted tricyclic amine was brought into reactions with electrophilic reagents: p-toluenesulfonyl chloride, p-toluoyl chloride, m-tolyl isocyanate, phenyl isothiocyanate, and endic anhydride to obtain a number of new derivatives; also, the corresponding salt with 1-adamantanecarboxylic acid was isolated. N-(p-Tolylsulfonyl)- and N-(m-tolylcarbamoyl)-4-azatricyclo-[5.2.1.0(2,6) ]dec-8-enes were oxidized to the corresponding 8,9-epoxy derivatives with monoperoxyphthalic acid. The structure of the products was confirmed by the data of IR, H-1 and C-13 NMR, and mass spectra. The molecular structures of N-(p-iodophenyl)bicyclo[2.2.1]hept-2-ene-endo-5,endo-6-dicarboximide and N-phenyl-4-azatricyclo[5.2.1.0(2,6)]dec-8-ene were established by X-ray analysis.
Catalytic Diastereospecific and Enantioselective (3 + 2) Transannulations of 1,2,3-Thiadiazoles with Strained Norbornene Derivatives
作者:Cunzhi Chen、Shuyan Fang、Ziyang Dong、Jiaxi Xu、Zhanhui Yang
DOI:10.1021/acs.orglett.2c00330
日期:2022.3.25
ring-strain-release strategy, iridium-catalyzed transannulations with norbornene derivatives are achieved in a diastereospecific and enantioselective manner. The first asymmetric transannulations of 1,2,3-thiadiazoles are reported.
Generation of Cyclopentadiene for
<i>Diels–Alder</i>
Reactions by Visible‐Light Irradiation of Iron Sandwich Complexes
作者:Alexey S. Sokolov、Alexander V. Polezhaev、Yulia V. Nelyubina、Dmitry S. Perekalin
DOI:10.1002/hlca.202100246
日期:2022.4
Cyclopentadienes readily undergo fast and selective Diels–Alder reactions which can be used for conjugation of biomolecules and polymers. Herein we present a new method for the photochemical generation of cyclopentadienes by the visible light irradiation of the iron complexes [(C5H4R)Fe(arene)]+. This reaction proceeds at room temperature, in water, and in the presence of potentially interfering amino
环戊二烯很容易发生快速和选择性的 Diels-Alder反应,可用于生物分子和聚合物的缀合。在此,我们提出了一种通过铁络合物[(C 5 H 4 R)Fe(芳烃)] +的可见光照射光化学生成环戊二烯的新方法。该反应在室温、水中和存在潜在干扰氨基酸的情况下进行。游离的环戊二烯被亲双烯体捕获,得到相应的Diels-Alder加合物,产率为 72-95%。