39831-27-1Relevant academic research and scientific papers
Reactions of β-Chlorovinylaldehydes. V. The Formation of 2,2'-Thiopyrylocyanine Dyes from 2-(α-Formylalkylidene)-2H-thiopyranes
Weissenfels, M.,Pulst, M.,Greif, D.,Hollborn, B.
, p. 763 - 770 (2007/10/02)
Substituted β-chlorocrotonaldehydes react with Na2S * 9H2O to form 2-(α-formylalkylidene)-2H-thiopyranes 1.The corresponding thiopyrylium salts 2 which are easily available from 1 and strong acids exist in the enolic form (2-β-hydroxyvinyl-thiopyrylium sa
