1-alkylmercapto-butadienes and 1-dialkylsulphoniobuta-1,3-diene salts - used in cycloaddition reaction etc

摘要

1-Alkylmercapto-butadienes and 1-dialkylsulphonio-buta-1,3-diene salts - used in cyclo-addition reactions etc. Novel title cpds. of formula (I) (where R1R1=H or lower alkyl, R3=aliphatic radical partic. lower alkyl, phenyl, X=anion partic. Cl Br or I, n=0, 1) are prepared by reaction of (II) with a base to give I n=1 which may be pyrolysed under reduced pressure to give I n=0 .