(3S,6R)-3-aminohexahydro-6-(cyclohexanecarbonyl)oxy-2H-azepin-2-one*HCl 、
(6E)-6,7,8,9-tetradeoxy-8,8-dimethyl-2-O-methyl-3,5-O-(1-methylethylidene)-gulo-non-6-enonic acid lactone 在
sodium 2-ethylhexanoic acid 作用下,
以
四氢呋喃 为溶剂,
反应 20.0h,
以88%的产率得到(2R,3R,4S,5R,6E)-3,5-(methylethylidene)-3,4,5-trihydroxy-2-methoxy-8,8-dimethyl-N-[(3S,6R)-hexahydro-2-oxo-6-(cyclohexylcarbonyl)oxy-2H-azepin-3-yl]non-6-enamide