Synthese D'une Serie de<i>N</i>-Alkyl et<i>N</i>-Aroxysulfonylcarbamates de 1-<i>F</i>-Alkyl-2-Thiophenylethyle
作者:I. Chehidi、H. Zoghlami、A. Baklouti
DOI:10.1080/10426500701566980
日期:2007.12.24
The action of 1-F-alkyl-2-thiophenylethanols on substituted isocyanates gives the corresponding 1-F-alkyl-2-thiophenylethyl-N-alkyl and N-aroxysulfonylcarbamates in good yields. The reaction was performed in dichloromethane under nitrogen atmosphere at room temperature.
Reactivity of F-alkyl oxirans was investigated towards nucleophilic and electrophilic reagents. They are quite inert in acid medium. On the other hand, in basic medium they lead to regiospecific opening reactions. Their reactions with organometalliccompounds need extreme conditions : with Grignardreagents they sometimes lead to unexpected results.
The synthesis of new 2-F-alkyl-2-hydroxyethylphenyl sulfoxides 3 and their 2-methyl ethers 4 is reported. They undergo the Pummerer rearrangement to yield 2-F-alkyl-1,2-diacetoxyethylphenyl sulfides 7 and 2-F-alkyl-1-etoxy-2-methoxyethylphenyl sulfides 8, respectively.