A series of N-hydroxyamino acids and their esters (9a, b, d-k) coupled with N-hydroxyglycinamide (9c) were synthesized through facile preparations of N-furfurylidenealkoxy (and hydroxy) carbonylalkylamine N-oxides (7a, b, d-g) and N-furfurylidenecarbamoylmethylamine N-oxide (7c) followed by hydrolysis. The method was applied to the syntheses of emimycin (1) and hadacidin monosodium salt (2b).
Anticoccidials. IV. A convenient synthesis of 2(1H)-pyrazinone 4-oxide derivatives.
作者:MITSUHIKO MANO、TAKUJI SEO、KINICHI IMAI
DOI:10.1248/cpb.28.2720
日期:——
2(1H)-Pyrazinone 4-oxide (emimycin) and its 1- and 6-substituted derivatives were synthesized by the reaction of a variety of 2-(hydroxyamino)acetamides with glyoxals.