A Cyclopropenethione-Phosphine Ligation for Rapid Biomolecule Labeling
作者:R. David Row、Jennifer A. Prescher
DOI:10.1021/acs.orglett.8b02296
日期:2018.9.21
Cyclopropenethiones are reported as new bioorthogonal reagents. These motifs react readily with substituted phosphines to provide thiocarbonyl adducts. In some cases, the ligations are >300-fold faster than analogous reactions with bioorthogonal cyclopropenones. Dialkyl cyclopropenethiones are also stable in aqueous buffers and can be used for biomolecule labeling in vitro and in cell lysate. The rapid
Stereospecific Reactions of Donor-Acceptor Cyclopropanes with Thioketones: Access to Highly Substituted Tetrahydrothiophenes
作者:André U. Augustin、Maximilian Sensse、Peter G. Jones、Daniel B. Werz
DOI:10.1002/anie.201708346
日期:2017.11.6
Lewis‐acid‐catalyzed reactions of 2‐substituted cyclopropane 1,1‐dicarboxylates with thioketones are described. Highly substituted tetrahydrothiophenes with two adjacent quaternary carbon atoms were obtained in a stereospecific manner under mild conditions and in high yield when using AlCl3 as Lewis acid. Moreover, an intramolecular approach was successfully implemented to gain access to sulfur‐bridged
描述了路易斯酸催化的2-取代的环丙烷1,1-二羧酸酯与硫酮的反应。当使用AlCl 3作为路易斯酸时,在温和的条件下以立体有择的方式高产率地获得了具有两个相邻的季碳原子的高度取代的四氢噻吩。此外,成功地采用了分子内方法来获得硫桥[ n .2.1]双环系统。在类似条件下,硒酮(较重的类似物)的转化导致形成各种四氢硒代苯。
A NOVEL CYCLISATION REACTION OF ALKYLTHIODIPHENYLCYCLOPROPENIUM IONS WITH 1,3-DIKETONES TO GIVE CYCLOPENTADIENOLS
作者:Hiroshi Yoshida、Mikito Nakajima、Tsuyoshi Ogata、Kiyoshi Matsumoto、R. Morrin Acheson、John D. Wallis
DOI:10.1246/cl.1983.155
日期:1983.2.5
Alkylthiodiphenylcyclopropenium ions reacted with 2,4-pentanedione or ethyl acetoacetate to give cyclopentadienol derivatives by ring expansion, while triphenylcyclopropenium perchlorate yielded substituted cyclopropenes.
A Novel Cyclization Reaction of Alkylthiodiphenylcyclopropenium Ions with Acyclic 1,3-Diketones to Give Cyclopentadienols
作者:Hiroshi Yoshida、Mikito Nakajima、Tsuyoshi Ogata、Kiyoshi Matsumoto、R. Morrin Acheson、John D. Wallis
DOI:10.1246/bcsj.56.3015
日期:1983.10
2,4-pentanedione (3a) and ethyl acetoacetate (3b) yielded the cyclopentadienol derivatives (4) by ringexpansion. One of the products 4a was shown to be 4-acetyl-5-hydroxy-5-methyl-1-methylthio-2,3-diphenyl-1,3-cyclopentadiene by X-ray crystallography. Chemical transformation of the products yielded some cyclopentenones. Triphenylcyclopropenium perchlorate reacted with 3a and 3b affording the ketocyclopropene
Reaction of Diphenylcyclopropenethione with Pyridinium Imines
作者:J. W. Lown、K. Matsumoto
DOI:10.1139/v72-090
日期:1972.2.15
Reaction of diphenylcyclopropenethione with a variety of N-substituted pyridinium imines in refluxing benzene gives 2,4,5-trisubstituted-6H-1,3-oxazin-6-thiones in good to excellent yields. The structure of 2,4,5-triphenyl-6H-1,3-oxazin-6-thione prepared in this manner was proven by oxidation and by hydrolysis to the known 2,4,5-triphenyl-6H-1,3-oxazin-6-one. In the preparation of 4,5-diphenyl-2-ethoxy-6H-1