Synthesis of 6-substituted indolactams by microbial conversion
摘要:
New indolactam derivatives (24-27) with a fluorine, bromine, iodine or methyl group at position 6 of (-)-indolactam-V (1) were synthesized from corresponding seco-compounds (6-substituted N-methyl-L-valyl-L-tryptophanols) by the microbial conversion using Streptoverticilium blastmyceticum NA34-17. (-)-5-Fluoroindolactam-V (23) and (-)-7-methylindolactam-V (28) were similarly obtained by this method. (-)-6-Methylindolactam-V (27) had almost the same biological activities as (-)-7-methylindolactam-V (28), indicating that the substituent effect at position 6 of (-)-indolactam-V (1) is similar to that at position 7.