102209-77-8Relevant articles and documents
Total syntheses of indolactam alkaloids (-)-indolactam V, (-)-pendolmycin, (-)-lyngbyatoxin A, and (-)-teleocidin A-2
Fine Nathel, Noah F.,Shah, Tejas K.,Bronner, Sarah M.,Garg, Neil K.
, p. 2184 - 2190 (2014/05/20)
We report the total syntheses of (-)-indolactam V and the C7-substituted indolactam alkaloids (-)-pendolmycin, (-)-lyngbyatoxin A, and (-)-teleocidin A-2. The strategy for preparing indolactam V relies on a distortion-controlled indolyne functionalization reaction to establish the C4-N linkage, in addition to an intramolecular conjugate addition to build the conformationally-flexible nine-membered ring. The total synthesis of indolactam V then sets the stage for the divergent synthesis of the other targeted alkaloids. Specifically, late-stage sp2-sp3 cross-couplings on an indolactam V derivative are used to introduce the key C7 substituents and the necessary quaternary carbons. These challenging couplings, in addition to other delicate manipulations, all proceed in the presence of a basic tertiary amine, an unprotected secondary amide, and an unprotected indole. Thus, our approach not only enables the enantiospecific total syntheses of four indolactam alkaloids, but also serves as a platform for probing complexity-generating and chemoselective transformations in the context of alkaloid total synthesis. This journal is the Partner Organisations 2014.
Synthesis of Teleocidins A, B and Their Congeners. Part 2. Synthesis of Lyngbyatoxin A (Teleocidin A-1), Teleocidin A-2, Pendolmycin, and (R,E)- and (S,E)-7-(3,7,11-Trimethyl-1,6,10-dodecatrien-3-yl)-(-)-indolactams V
Muratake, Hideaki,Okabe, Kazuaki,Natsume, Mitsutaka
, p. 8545 - 8558 (2007/10/02)
Details of the synthesis method of the tumor promoters, lyngbyatoxin A (= teleocidin A-1) (1) and teleocidin A-2 (2) from (R)- and (S)-methyl N--N-methyl-L-valinate (3 and 4) are presented.Other titled compounds, 6, 7a, and 7b, were prepared analogously. Key words: alkaloid synthesis; lyngbyatoxin A, teleocidin A-2; pendolmycin; teleocidin analogs.