“Single tail” and “twin tail” 3-(perfluoroalkylethanethia)alkylsuccinic anhydrides give RF segmented diacids, amic acids, imides, esters, and salts
作者:Neal O. Brace、Steven G. Mull
DOI:10.1016/s0022-1139(02)00333-0
日期:2003.5
non-equivalent in NMR spectra. Similarly, in succinamic acids 31a,b and 32a,b, derived from anhydride 3 and amine CH3NHR, the syn and anti methyls of the (−)OCN(+)(CH3)R amide function give two NMR signals. Likewise, the slowly rotating R[R(CH2)3N(CH3)2] groups of 31a,b and 32a,b give rise to syn and anti tautomers with non-equivalent N(CH3)2 groups. The imides from reaction of 3–7, or 8–13, with NH2(CH2)3N(CH3)2
将R F CH 2 CH 2 SH(1 ; R F = n -C 6 F 13 ; n -C 8 F 17 ; n -C 10 F 21 ; RSH)自由基加成到2-烯-1-基琥珀酸酐(2 - 7 ; C3-C6和C8)给出加合物8 - 13(RSCHR 1 CH 2 CHR 2 [ ])在90-100%的转化率和收率。因此,将硫醇1加到2(R 1,R 2= H)或3(3-烯-2-基酐; R 1= H,R 2= Me),仅分别给出末端RS-取代的加合物8和9。然而,较高的链烯基的酸酐4 - 7(R 1 = CH 3(CH 2)Ñ,Ñ = 0-4)添加1,得到区域异构酸酐10A,b - 13A,b与双- [R ˚F和不同大小的烷基尾巴。酸酐8 - 13A,b与亲核试剂定量反应。胺产生琥珀酸,然后酰亚胺化;水和强碱产生二酸和盐;乙醇和二甘醇得到半酯。二乙胺和8给出RS-取代的琥珀酸RS(CH 2)3