作者:You-Chen Lin、Fabian Schneider、Kelly J. Eberle、Debora Chiodi、Hugh Nakamura、Solomon H. Reisberg、Jason Chen、Masato Saito、Phil S. Baran
DOI:10.1021/jacs.2c05892
日期:2022.8.17
A concise, modular synthesis of the novel antibiotic darobactin A is disclosed. The synthesis successfully forges the hallmark strained macrocyclic ring systems in a sequential fashion. Key transformations include two atroposelective Larock-based macrocyclizations, one of which proceeds with exquisite regioselectivity despite bearing an unprotected alkyne. The synthesis is designed with medicinal chemistry
A short, atroposelective synthesis of cihunamide B (1) is reported. The feature of this report is the decagram-scale SNAr reaction of l-tryptophan derivatives, followed by atroposelective Larock macrocyclization. This strategy allowed the construction of a Trp-Trp cross-linkage with unprecedented atropisomerism. The atroposelectivity of this Larock macrocyclization has been investigated through a combination
报道了cihunamide B ( 1 ) 的简短、间质选择性合成。该报告的特点是L-色氨酸衍生物的十克规模的SN Ar反应,然后是atroposelective Larock大环化。该策略允许构建具有前所未有的阻转异构性的色氨酸-色氨酸交联。通过实验和计算化学的结合,研究了这种 Larock 大环化的间质选择性,从而对联芳基键的合成产生了详细的见解。它还能够简明合成cihunamide B ( 1 ),该化合物有望成为一种潜在的抗菌剂。
Total Synthesis of Dynobactin A
作者:Fabian Schneider、Yinliang Guo、You-Chen Lin、Kelly J. Eberle、Debora Chiodi、Johnathan A. Greene、Chenxin Lu、Phil S. Baran
DOI:10.1021/jacs.3c11560
日期:2024.3.13
The first total synthesis of the potent antimicrobial agent dynobactin A is disclosed. This synthesis enlists a singular aziridine ring opening strategy to access the two disparate β-aryl-branched amino acids present within this complex decapeptide. Featuring a number of unique maneuvers to navigate inherently sensitive and epimerizable functional groups, this convergent approach proceeds in only 16
首次公开了强效抗菌剂 Dynobactin A 的全合成。该合成采用单一的氮丙啶开环策略来接触该复杂十肽中存在的两个不同的 β-芳基支链氨基酸。这种聚合方法具有许多独特的操作来导航固有敏感和差向异构的官能团,从商业材料中仅需要 16 个步骤 (LLS),并且应该有助于合成用于药物化学研究的众多类似物。
Scalable Total Syntheses of <i>N</i>-Linked Tryptamine Dimers by Direct Indole−Aniline Coupling: Psychotrimine and Kapakahines B and F
作者:Timothy Newhouse、Chad A. Lewis、Kyle J. Eastman、Phil S. Baran
DOI:10.1021/ja1009458
日期:2010.5.26
This report details the invention of a method to enable syntheses of psychotrimine (1) and the kapakahines F and B (2, 3) on a gram scale and in a minimum number of steps. Mechanistic inquiries are presented for the key enabling quaternization of indole at the C3 position by electrophilic attack of an activated aniline species. Excellent chemo-, regio-, and diastereoselectivities are observed for reactions with o-iodoaniline, an indole cation equivalent. Additionally, the scope of this reaction is broad with respect to the tryptamine and aniline components. The anti-cancer profiles of 1-3 have also been evaluated.