Efficient and Practical One-Pot Conversions of N-Tosyltetrahydroisoquinolines into Isoquinolines and of N-Tosyltetrahydro-β-carbolines into β-Carbolines through Tandem β-Elimination and Aromatization
An efficient, practical, and general method for conversions of N-tosyltetrahydroisoquinolines (N-tosyl-THIQs) into isoquinolines and of N-tosyltetrahydro-β-carbolines (N-tosyl-THBCs) into β-carbolines is described. Treatment of N-tosyl-THIQs or N-tosyl-THBCs with base in dimethyl sulfoxide afforded dihydroisoquinolines or dihydro-β-carbolines as intermediates, and these were then oxidized in situ by
Selenium dioxide oxidation of tetrahydro-β-carboline derivatives
作者:Franco Gatta、Domenico Misiti
DOI:10.1002/jhet.5570240449
日期:1987.7
The oxidation of some tetrahydro-β-carboline derivatives with selenium dioxide led to the formation of 1,4-dihydro or fully aromatic β-carbolines, depending on the nature and the number of substituents at 1 position. The oxidation of 2-acetyl derivatives followed a different course and the products originated by the attack at C-1 of the ring C of the tetrahydro-β-carboline were obtained.
A series of new podophyllotoxin linked β-carboline congeners have been synthesized by coupling various substituted β-carboline acids with 4β-aminopodophyllotoxin. Evaluation of their anticancer activity against a panel of human cancer cell lines such as lung cancer (A549), prostate cancer (DU-145), MDA MB-231 (breast cancer), HT-29 (colon cancer) and HeLa (cervical cancer) suggested that 7i and 7j
issue that generally occurs in areas with developed animal husbandry. In search of safe and effective therapeutic agents against echinococcosis, we designed and synthesized new 1,3-substituted β-carbolinederivatives based on harmine. Among them, compounds 1a, 1c, and 1e displayed potent inhibitory activity against Echinococcus granulosus in vitro, significantly better than albendazole and harmine. The
Simple and efficient method for aromatization of tetrahydro-β-carbolines by using K2S2O8 as a catalyst and its antimicrobial activity comparison with molecular docking studies
A novel and efficient aromatization of tetrahydro-beta-carbolines under mild conditions using K2S2O8 as a catalyst was developed. The method is applicable for all kinds of C-1 substituted systems. All synthesized compounds were screened for their in vitro antibacterial activity against Staphylococus aureus, Bacillus subtilis, Escherichia coli, and Klebsiella pneumonia, as well as fungi, such as Aspergillus flavus and Fusarium oxysporum. Compounds 4b, 4g, 4i, and 4k demonstrated excellent in vitro antibacterial and antifungal activities than the standard drugs. The docking studies were carried out for most active compounds 4b, 4g, 4i, and 4k.