(3aR,4R,6S,6aR)-4-(2-Amino-acetylamino)-2,2,6-trimethyl-tetrahydro-furo[3,4-d][1,3]dioxole-4-carboxylic acid methyl ester 在
potassium tert-butylate 作用下,
以
四氢呋喃 为溶剂,
反应 24.0h,
以70%的产率得到(2S,3R,4R,5R)-3,4-O-isopropylidene-2-methyl-6,9-diaza-1-oxaspiro[4.5]decane-7,10-dione