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
Palladium-Catalyzed Asymmetric Allylic Alkylation of 3-Substituted 1<i>H</i>-Indoles and Tryptophan Derivatives with Vinylcyclopropanes
作者:Barry M. Trost、Wen-Ju Bai、Christoph Hohn、Yu Bai、James J. Cregg
DOI:10.1021/jacs.8b03656
日期:2018.5.30
this report, we reverse this reactivity and drive the 1,3-dipoles to serve as electrophiles by employing 3-alkylated indoles as nucleophiles. This represents the first use of VCPs for the completely atom-economic functionalization of 3-substituted 1 H-indoles and tryptophan derivatives via a Pd-catalyzed asymmetric allylic alkylation (Pd-AAA). Excellent yields and high chemo-, regio-, and enantioselectivities