Electrophilic thallation of thiophene and its derivatives (2-methyl-, 2-chloro-, 2-bromo-, and 2-iodothiophenes, 2-thiopheneacetonitrile, 2-thiophenecarbonitrile, 3-methyl- and 3-bromothiophenes, and 3- thiophenecarboxaldehyde) as well as furan using (18-crown-6)phenylthallium(III) diperchlorate (1) (1 Is also named as phenylthallium(III) 18-crown-6 diperchlorate) was studied. The thallation occurred at the position α to the sulfur atom of thiophene and the oxygen atom of furan, affording the corresponding (18-crown-6)phenylarylthallium(III) perchlorate complexes 2–12. The thallations of thiophenecarboxaldehydes took place without oxidation of the aldehyde groups.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry