A process is provided for the preparation of a compound of the general formula (I): wherein R is H or C1-4 alkyl, which comprises treating a compound of the general formula (II): where R' is R or R8CO, R is as defined above, R8 is C1-8 alkyl or optionally substituted phenyl and R9 is optionally substituted C1-8 alkyl or optionally substituted aryl, with an amine R''NH2 wherein R'' is H or C1-4 alkyl. Also provided are the trans isomers of the compound (I) where R is CH3 (6-epi-malayamycin A) and H (6-epi-desmethylmalayamycin A), the cis and trans isomers of the compound (I) where R is C2-4 alkyl and various intermediate compounds.
提供一种制备通式(I)化合物的过程:其中R为H或C1-4烷基,包括处理通式(II)化合物的步骤:其中R'为R或R8CO,R如上所定义,R8为C1-8烷基或可选择取代的苯基,R9为可选择取代的C1-8烷基或可选择取代的芳基,与胺R''NH2反应,其中R''为H或C1-4烷基。还提供了化合物(I)的顺式异构体,其中R为
CH3(6-epi-malayamycin A)和H(6-epi-desmethylmalayamycin A),以及化合物(I)的顺式和反式异构体,其中R为C2-4烷基和各种中间化合物。