148587-73-9Relevant academic research and scientific papers
1,3-Dithiols with an Annulated Cyclopentadiene Ring
Hartke, Klaus,Timpe, Carsten
, p. 183 - 188 (2007/10/02)
5-Chloro-2-cyclopenten-1-ones 4 react with sodium N,N-dialkyldithiocarbamates to form the dithiocarbamic esters 5.These are cyclized by strong acids to yield either in a Michael addition the iminium salts 6 or in a condensation reaction the iminium salts 7.Sulfhydrolysis of 7 gives rise to the 4H-cyclopenta-1,3-dithiol-2-thione 8.By cleavage of dithiuram disulfides 10 with sodium cyclopentadienide the cyclopentadienes 12 and 13 are formed.They condense with acetone/pyrrolidine to give either the pentafulvenes 16 or the dihydropentalenes 17. - Key Words: 1,3-Dithiols / Cyclopentadienes / Pentafulvenes / Pentalenes
