## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a βFull Textβ option. The original article is trackable v
Nucleophilic Intramolecular Cyclization Reactions of Alkynechalcogenolates
β Scribed by M.A. Abramov; W. Dehaen; B. D'hooge; M.L. Petrov; S. Smeets; S. Toppet; M. Voets
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- French
- Weight
- 137 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0040-4020
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β¦ Synopsis
AbstractΓ2-(ortho-Hydroxyphenyl)-alkynethiolates and -selenolates, obtained through base catalyzed ring cleavage of 4-(ortho-hydroxyphenyl)-1,2,3-thiadiazoles and -1,2,3-selenadiazoles, smoothly transform into 2-benzofuranthiolates and -selenolates. These reactive intermediates can be alkylated in high yield. This reaction sequence could be applied to the synthesis of electron rich thiacrown ethers. The 2-(ortho-aminophenyl)-alkynethiolate analogously forms 2-methylsulfanylindole.
π SIMILAR VOLUMES
N-alkylpyrimidinium cations carrying a dienophilic side-chain at the 2-or 5position undergo intramolecular inverse electron demand Diels-Alder reactions into the corresponding annelated pyridine derivatives under considerably milder conditions than the corresponding neutral pyrimidines. Protonation