反应详情

In J. Am. Chem. Soc./98:22/Oct. 27, 1976, Langlois et al describe a process in which the monomers catharanthine and vindoline are coupled to form AVLB. The coupling is performed using a peracid to generate first the N-oxide of catharanthine, followed by Polonovski-type fragmentation of the N-oxide initiated with addition of trifluoroacetic anhydride to form a dimer. A reducing agent such as sodium borohydride is then added to generate AVLB which can be isolated e.g. chromatographically.