Nucleophilic Substitutions at Olefinic Carbon Atoms.<i>S</i>-<i>N</i>and<i>N</i>-<i>N</i>Exchange Reactions of 4-Trifluoroacetyl- and 4,4-Bis(trifluoroacetyl)-1,3-butadienyl Sulfides and -Amines with Various Amines
作者:Masaru Hojo、Ryoichi Masuda、Etsuji Okada
DOI:10.1246/cl.1990.2095
日期:1990.11
Nucleophilic substitutions at olefiniccarbon atoms of 4-trifluoroacetyl- and 4,4-bis(trifluoroacetyl)-1,3-butadienyl sulfides and -amines with various amines proceed easily under mild conditions to give the corresponding S-N and N-N exchanged products.
A Facile and Convenient Synthesis of 5,5-Dialkylthio- and 5-Alkyl(or Aryl)thio-2,4-pentadienoic Acids
作者:Masaru Hojo、Ryoichi Masuda、Etsuji Okada
DOI:10.1055/s-1991-26377
日期:——
The hydrolysis of 6,6-dialkylthio- and 6-alkyl(or aryl)thio-1,1,1-trifluoro-3,5-hexadien-2-ones 2, 5 with potassium hydroxide in ethanol proceeds quite easily to give the corresponding 2,4-pentadienoic acids 3, 6, respectively, in excellent yields. Bistrifluoroacetyl compounds 8,10a, b give corresponding monocarboxylic acids 6a, 3a, b in high yields, with accompanied monodecarboxylation.