Efficient Synthesis of<i>N</i>-Prenylpyrroloindoline and<i>N</i>-Prenylindole Alkaloids Based on a New Four-Reaction Anionic Domino Process
作者:Pilar López-Alvarado、Esmeralda Caballero、Carmen Avendaño、J. Carlos Menéndez
DOI:10.1021/ol061631m
日期:2006.9
Treatment of 2,5-diketopiperazines or carbamates derived from tryptophan or tryptamine with iodomethyltrimethylsilane followed by lithium hexamethyldisilazane and a prenyl halide produced stereoselectively derivatives of the hexahydropyrrolo[2,3-b]indole system bearing prenyl substituents both at C-3a and at the indoline nitrogen in a one-pot procedure involving a novel four-reaction anionic domino
Brief Total Synthesis of the Cell Cycle Inhibitor Tryprostatin B and Related Preparation of Its Alanine Analogue
作者:Esmeralda Caballero、Carmen Avendaño、J. Carlos Menéndez
DOI:10.1021/jo034703l
日期:2003.9.1
Tryprostatin B was synthesized in 32% overall yield from the readily available dipeptide anhydride cyclo-(l-Trp-l-Pro). Its tandem C-3 prenylation/cyclization gave the corresponding pentacyclic pyrroloindole systems bearing a prenyl group at the indole C-3 position. These compounds were then submitted to acid-catalyzed opening of the newly formed ring, with concomitant migration of the prenyl group