Pentafluoropropionyl group

Scheme 5.17 Effect of acetyl and pentafluoropropionyl groups at 0-4 of 2-azido-2-deoxygalactosyl donors.

Table 1 Gas chromatographic resolution factors of N-pentafluoropropionyl amino acid isopropyl esters on polysiloxanes carrying chiral L-valine t-butylamide groups (Val-NtBu)... 

Alternative methods for differentially derivatizing hydroxyl (phenolic) and carboxylic groups in organic acids include acetylation and methylation (Williams and Leonard, 1963), propionylation and esterification (Dalgliesh et al., 1966), and heptafluorobutyrylation or pentafluoropropionylation with ethyl ester formation (Brooks et al., 1974 Weg et al., 1975), but, in general, while these methods may be suitable for qualitative work, they are unsuitable for quantitative studies. Recently, however, Dziedzic et al. (1972) used... 

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