作者:Li-Xian Gan、Paul A. Seib
DOI:10.1016/0008-6215(91)80010-k
日期:1991.11
and hydrochloric acid gave 59% crystalline 3,4- O -benzylidene- d -ribono-1,5-lactone. This acetal was oxidized with manganese dioxide in acetone to its 2-keto derivative ( 6 ) in 76% yield. Acid-catalyzed methanolysis of 6 gave a syrupy mixture of products, which upon tautomerization in hot methanolic sodium acetate followed by removal of sodium ions gave 78% d -erythroascorbic acid ( 7 ). The overall
摘要d-ribono-和d-arabinono-1,4-内酯的4:1混合物与苯甲醛和盐酸的反应生成59%结晶3,4-O-亚苄基-d-ribono-1,5-内酯。该乙缩醛用丙酮中的二氧化锰氧化成其2-酮衍生物(6),产率为76%。酸催化的6的甲醇分解产生了浆状的产物混合物,将其在热的甲醇乙酸钠中互变异构化,然后除去钠离子,得到78%的d-赤藓抗坏血酸(7)。从d-葡萄糖开始的7的总产率为20%。