109346-66-9Relevant articles and documents
Synthesis and biological activities of (-)-6-n-octyl-indolactam-V, a new potent analogue of the tumor promoter (-)-indolactam-V.
Nakagawa,Irie,Nakamura,Ohigashi,Hayashi
, p. 1568 - 1573 (1998)
(-)-Indolactam-V (1) without a hydrophobic chain at positions 6 and 7 of the indole ring is a weak tumor promoter compared with teleocidin Bs. To investigate the effects of the hydrophobic substituent at position 6 of teleocidin Bs, we synthesized (-)-6-n-octyl-indolactam-V (2) by a palladium-catalyzed coupling reaction from (-)-6-bromo-indolactam-V (7) which had been obtained by microbial conversion with Streptoverticillium blastmyceticum NA34-17 as the key step. (-)-7-n-Octyl-indolactam-V (3) with potent biological activities comparable to those of teleocidin Bs was similarly synthesized from (-)-7-bromo-indolactam-V as a positive control. Compound 2 showed similar biological activities to those of 3, indicating that the effect of the hydrophobic substituent at position 6 of 1 was identical to that at position 7.
Protein Kinase C Modulators. Indolactams. 2. Alkylation of 4-Nitroindole by Grignard Reagents. Synthesis of (-)-7-Octylindolactam V
Quick, James,Saha, Bijali
, p. 8553 - 8556 (2007/10/02)
A method for the C-alkylation of 4-nitroindole at the 5 and 7 positions by alkyl Grignard reagents has been developed.The 4-nitro-7-octylindole thus prepared has been used as a starting material for the synthesis of the lyngbyatoxin analog, (-)-7-octylindolactam V.