TỔNG HỢP CHẤT HOẠT ĐỘNG BỀ MẶT ETHANOLAMIDE VÀ ETHANEDIAMIDE TỪ MỠ CÁ BASA
Abstract
Treating catfish fat based methyl esters with ethanolamine or ethylenediamine at elevated temperature has led to the formation of N-(2-hydroxyethyl)amide (4) or N,N'-(ethane-1,2-diyl) dienamide (5), respectively, in good to reasonable yields. These types of fatty alkanolamide showed good surface activities. Upon oxidation using HCOOH/H2O2 system, the carbon-carbon double bonds on the hydrocarbon side chains were successfully epoxidized and subsequently undergone ring opening to form the corresponding formyloxyhydroxy and dihydroxy ester products. This mixture was then directly treated with ethanolamine or ethylenediamine to afford the final dihydroxy N-(2-hydroxyethyl) amide (6) in good yield although an extra formate hydrolysis step was necessary in the synthetic case of (7). The introduction of the hydroxy groups in fact brought benefit by increasing the surface activities of the synthetic alkanolamide and alkanediamide surfactants.
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Tài liệu tham khảo
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