Divergent Approach for the Synthesis of Gombamide A and Derivatives
作者:Mohana Rao Vippila、Sameer Nikhar、Alan P. Gracia、Gregory D. Cuny
DOI:10.1021/acs.orglett.6b02379
日期:2016.9.16
A synthesis of gombamide A (1) using N-terminal peptide extension, oxidative disulfide bond formation, and late-stage 4-hydroxystyrylamide installation has been achieved. This divergent method was also utilized to synthesize several gombamide A derivatives with modification to the 4-hydroxystyrylamide via cyclic peptide 2. The natural product and four derivatives were found to be devoid of Na+/K+-ATPase
已经实现了使用N端肽段延伸,氧化二硫键形成和后期4-羟基苯乙烯基酰胺装置合成Gombamide A(1)的方法。这种发散的方法还用于通过环肽2合成几种对4-羟基苯乙烯基酰胺有修饰的邻苯二甲酰胺A衍生物。发现该天然产物和四种衍生物在10μM下没有Na + / K + -ATPase活性。此外,这些化合物在10μM的浓度下对一组癌细胞没有细胞毒性。
First Total Synthesis of<i>N</i>-(3-Guanidinopropyl)-2-(4-hydroxyphenyl)-2-oxoacetamide
作者:Satish S. More、Akula Raghunadh、Ramanathan Shankar、Navin B. Patel、Dinesh S. Bhalerao、Unniaran K. Syam Kumar
DOI:10.1002/hlca.201300318
日期:2014.3
isolated from aqueous extracts of hydroid Campanularia sp., has been achieved. The α‐oxo amide 12, prepared via the oxidative amidation of 1‐[4‐(benzyloxy)phenyl]‐2,2‐dibromoethanone (9a) with 4‐[(tert‐butyl)(dimethyl)silyl]oxy}butan‐1‐amine (10a), has been used as the key intermediate in the total synthesis of 3 as HBr salt. On the way, an expeditious total synthesis of polyandrocarpamide C (2c),
Route to Functionalized Tetrahydrobenzo[<i>d</i>]azepines via Re<sub>2</sub>O<sub>7</sub>-Mediated Intramolecular Friedel–Crafts Reaction
作者:Yuzhu Zheng、Qing Huang、Xiong Fang、Youwei Xie
DOI:10.1021/acs.joc.3c01977
日期:2024.2.2
We describe a Re2O7-mediated intramolecular dehydrative Friedel–Crafts reaction for the efficient synthesis of various benzo-fused heterocycles such as benzazepines and benzazocines. This process is characterized by a broad substrate scope, mild reaction conditions, high efficiency, and high atom economy. The potential application of this methodology was exemplified by the facile preparation of a NMDA
我们描述了 Re 2 O 7介导的分子内脱水弗里德尔-克来福特反应,用于有效合成各种苯并稠合杂环化合物,例如苯并氮杂卓和苯并佐辛。该工艺具有底物范围广、反应条件温和、效率高、原子经济性高等特点。 NMDA 拮抗剂以及 SKF 38393 过程中的关键中间体的轻松制备证明了该方法的潜在应用。
Germanium(II)-Mediated Reductive Mannich-Type Reaction of α-Bromoketones to<i>N</i>-Alkylimines
作者:Shin-ya Tanaka、Nobuo Tagashira、Kouji Chiba、Makoto Yasuda、Akio Baba