Reactions of the fluorinating agent CF3OF with amino acid derivatives and peptides
作者:Alice R. Ritter、Charles F. Hammer
DOI:10.1016/0022-1139(95)03321-1
日期:1996.3
A number of Hydrophobic acyl amino acid esters were fluorinated using CF3OF, yielding N-fluoroamides. The 1H, 13C and 19F nuclear magnetic resonance (NMR) data for these compounds are reported. The first 14N NMR spectrum of an N-fluoroamide is also reported, namely that of N-acetyl-N-fluoroglycine ethyl ester. The 14N resonance of the fluorinated compound was shifted downfield by over 100 ppm from
使用CF 3 OF氟化许多疏水性酰基氨基酸酯,得到N-氟酰胺。报告了这些化合物的1 H,13 C和19 F核磁共振(NMR)数据。还报道了N-氟代酰胺的前14 N NMR谱,即N-乙酰基-N-氟代甘氨酸乙酯的谱。氟化化合物的14 N共振从起始材料向低磁场偏移超过100 ppm。CF 3 OF与N-乙酰亮氨酸乙酯反应生成N-氟代酰胺,以及亮氨酸的γ-氢被氟取代的化合物。用CF 3 OF处理环五肽c-(gly-pro-gly-d-ala-pro)产生了氟化烃,N-氟代酰胺和二氟代酰胺的难处理的混合物。由用CF 3 OF处理N-乙酰基脯氨酸得到的混合物的分离导致馏分的回收,该馏分的19 F NMR光谱表明在脯氨酸氮上氟化并且随后打开了脯氨酸环。用CF 3 OF处理环五肽c-(gly-leu-gly-gly-gly)的过程非常有限,得到的N混合物-氟代酰胺对特定位置的氟化没有偏爱。