The synthesis of perfluoro (N,N-dialykylcarbamoyl fluorides) by the reaction of perfluoro (N,N-dialkylmethylamines) with oleum

✍ Scribed by Takashi Abe; Eiji Hayashi

• Book ID: 104150867
• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 800 KB
• Volume: 45
• Category: Article
• ISSN: 0022-1139
• DOI: 10.1016/s0022-1139(00)84155-x

✦ Synopsis

A convenient one-step preparation of new perfluoro(N,N-dialkylcarbamoyl fluorides) [dialkyl groups: Rf=R;=C2F5 (g); Rf=C2F5, R;=n-C3F7 (112); Rf=R;=n-C3F7 (3); Rf=n-C3F,,R;=n-C4F9 (9); Rf=n-C3F,,R;=n-C5F11 (5&j; Rf=R;=n-C4F9 (a); Rf=n-C3F7,R;=CF3 (3); Rf=n-C4F9,Ri=CF3 (s); Rf=n-C5F11,R;=CF3 (2) I is described: the corresponding perfluoro(N,N-dialkylmethylamines) are treated with oleum. Catalysts (HgSO4 and MoC15) improved the yields and the purity of the products obtained. Conditions for the preparation of nine new perfluorocarbamoyl fluorides and their properties are described: several reactions using lb and 9b were -conducted. As far as perfluoro(N,N-dialkylcarbamoyl fluorides) are concerned, to our knowledge, very few synthetic approaches have so far been reported: they involve (1) the electrochemical flu-