Reactions of per(poly)-fluoroalkanesulfonyl azides RfSO2N3 with trimethylsilyl enol ethers RCHC(H)OSiMe3 (R1=t-Bu, Ph) afforded α-[N-(fluoroalkanesulfonyl)]amino ketones RC(O)CH2NHSO2Rf in good yields. The cycloanalog 1-cyclohexenyl trimethylsilyl ether reacted with the azides to give one-carbon ring-contracted product N-fluoroalkanesulfonyl cyclopentanecarboxamides, c-C5H11CONHSO2Rf. In the case
全(聚)氟代烷烃磺酰基叠氮化物R f SO 2 N 3与三甲基甲硅烷基烯醇醚RCHC(H)OSiMe 3(R 1 = t -Bu,Ph)的反应得到α-[ N-(氟代烷烃磺酰基)]氨基酮RC (O)CH 2 NHSO 2 R f的产率很高。环类似物1-环己烯基三甲基甲硅烷基醚与叠氮化物反应,生成一碳环缩合产物N-氟烷烃磺酰基环戊烷羧酰胺,cC 5 H 11 CONHSO 2 R f。然而,在1-环辛烯基三甲基甲硅烷基醚的情况下,获得了两种产物α-[ N-(氟代烷烃磺酰基)胺环辛酮和cC 7 H 13 CONHSO 2 R f。
Synthesis and structure of environmentally relevant perfluorinated sulfonamides
作者:Hans-Joachim Lehmler、V.V.V.N.S. Rama Rao、Dhananjaya Nauduri、John D. Vargo、Sean Parkin
DOI:10.1016/j.jfluchem.2007.01.013
日期:2007.6
perfluorooctanesulfonyl fluoride via the azide by reduction with Zn/HCl. All perfluorooctanesulfonamides contained linear as well as branched C(8)F(17) isomers, typically in a 20:1 to 30:1 ratio. The crystal structures of N-ethyl and N,N-diethyl perfluorooctanesulfonamide show that the S-N bond has considerable double bond character. This double bond character results in a significant rotational barrier around