Application of Pd-Catalyzed C–H Alkylation Reaction in Total Syntheses of Twelve Amicoumacin-Type Natural Products
作者:Hui-Hong Wang、Zhao Li、Yi-Yue Feng、Gao-Feng Yin、Tao Shi、Dian He、Xiao-Dong Wang、Zhen Wang
DOI:10.1021/acs.orglett.1c02576
日期:2021.9.3
Enantioselective total syntheses of 12 amicoumacin-type natural products are accomplished with a palladium(II)-catalyzed C–H alkylation as the key step to furnish the 3,4-dihydroisocoumarin scaffold. The target chemicals are assembled in a convergent protocol by merging 3,4-dihydroisocoumarin derived amine part with categories of acid segments that are efficiently prepared by chemoselective catalytic
12 种阿米香豆素类天然产物的对映选择性全合成是通过钯 (II) 催化的 C-H 烷基化作为提供 3,4-二氢异香豆素支架的关键步骤完成的。通过将 3,4-二氢异香豆素衍生的胺部分与通过手性 1,2-二羟乙基呋喃-2(5H)-ones 的化学选择性催化氧化有效制备的酸链段类别合并,将目标化学品组装在一个收敛协议中。随后,研究了阿米香霉素对五种癌细胞系和一种正常细胞系的细胞毒性。
Total synthesis of AI-77-B
作者:Simon D. Broady、Jost E. Rexhausen、Eric J. Thomas
DOI:10.1039/c39910000708
日期:——
Stereoselective hydroxylation of the β-lactam ester 8 is a key step in a totalsynthesis of AI-77-B 1.
β-内酰胺酯8的立体选择性羟基化是AI-77-B 1完全合成的关键步骤。
Concise Synthesis of PM-94128 and Y-05460M-A
作者:Masaru Enomoto、Shigefumi Kuwahara
DOI:10.1021/jo9014968
日期:2009.10.2
The enantioselective total synthesis of PM-94128, a potent cytotoxin of microbial origin, was accomplished by a concise nine-step sequence of reactions in 14% overall yield from N-Boc-L-leucine. The synthesis of Y-05460M-A, a one-carbon lower homologue of PM-94128, was also achieved from N-BOC-L-valine by the same approach, which enabled its stereochemical determination.