benzyl alpha-aminocyanoacetate methanesulfonic acid salt 、
t-butyl D,L-erythro-O-isopropylidene-4,5-dihydroxy-2-oximino-3-oxohexanoate 以
乙醇 为溶剂,
反应 168.0h,
以33%的产率得到2-amino-3-(carbobenzyloxy)-5-(D,L-erythro-1',2'-dihydroxypropyl)pyrazine-6-carboxylic acid gamma-lactone 1-oxide