Modular Syntheses of Phenanthroindolizidine Natural Products
作者:Young-In Jo、Martin D. Burke、Cheol-Hong Cheon
DOI:10.1021/acs.orglett.9b01397
日期:2019.6.7
A highlyconcise strategy for the total synthesis of phenanthroindolizidines was developed. The one-pot iterative Suzuki–Miyaura reaction of aryl boronic acids with ortho-bromoaryl N-methyliminodiacetate (MIDA) boronate followed by a second Suzuki–Miyaura reaction with a suitable pyridyl bromide provided ortho-aza-terphenyls. Subsequent saturation of the triple bond, treatment with mesyl chloride,
Cyano Group Removal from Cyano-Promoted Aza-Diels–Alder Adducts: Synthesis and Structure–Activity Relationship of Phenanthroindolizidines and Phenanthroquinolizidines
Phenanthroindolizidines and phenanthroquinolizidines were concisely synthesized by the reductive decyanization of cyano-promoted intramolecular aza-Diels–Alder cycloadducts followed by aryl–aryl coupling. Cyano groups were removed from α-aminoacrylonitriles via treatment with sodium borohydride in 2-propanol in almost quantitative yields; a possible mechanism was proposed and examined using D-labeling experiments
PHENANTHROINDOLIZIDINE AND PHENANTHROQUINOLIZIDINE ALKALOID HAVING A HYDROXYL GROUP ON THE PHENANTHRENE RING THEREOF, PREPARATION METHOD AND USE THEREOF
申请人:CHUANG TA-HSIEN
公开号:US20170152257A1
公开(公告)日:2017-06-01
A phenanthroindolizidine and phenanthroquinolizidine alkaloid having a hydroxyl group on the phenanthrene ring thereof was synthesized, which exhibits potent activity as an anticancer agent against, such as breast cancer, lung cancer, and prostate cancer.
Iron(III) chloride has been used to prepare polymethoxy-substituted phenanthrene-9-carboxylic acid via intramolecular oxidative coupling at room temperature in excellent yields. Mild reaction conditions and the use of environmentally friendly FeCl3 provide a novel practical route for the synthesis of the important phenanthrene ring. The further application of this protocol as the key step to total