Visible light mediated selective oxidation of alcohols and oxidative dehydrogenation of N-heterocycles using scalable and reusable La-doped NiWO<sub>4</sub> nanoparticles
A systematic study led to a selective synthesis of aldehydes under an argon atmosphere while the ODH of partially saturated heterocycles under an oxygen atmosphere resulted in very good to excellent yields. The methodology is atom economical and exhibits excellent tolerance towards various functional groups, and broad substrate scope. Furthermore, a one-pot procedure was developed for the sequential
Dehydrogenation of 1-aryl(hetaryl)-1,2,3,4-tetrahydro-9H-β-carboline-3-carboxylic acids and their esters with dimethyl sulfoxide
作者:M. G. Abramyants、D. A. Lomov、T. I. Zavyazkina
DOI:10.1134/s1070428016110117
日期:2016.11
boline-3-carboxylic acids derivatives with dimethyl sulfoxide leads to the formation of 1-aryl(hetaryl)-9Н-β-carbolines. Simultaneously with the dehydrogenation decarboxylation occurs. At the oxidation with dimethyl sulfoxide of methyl 1-aryl (hetaryl)-1,2,3,4-tetrahydro-9Н-β-carboline-3-carboxylicates methyl 1-aryl(hetaryl)-9Н-β-carboline-3-carboxylates formed whose hydrolysis afforded the corresponding
1-芳基(杂芳基)-1,2,3,4-四氢-9-氧化脱氢Н -β-β-咔啉-3-羧酸的衍生物与二甲亚砜通向1-芳基(杂芳基)-9形成Н - β-咔啉。与脱氢同时发生脱羧。在用甲基1-芳的二甲亚砜(杂芳基)-1,2,3,4-四氢-9-氧化Н -β-β-咔啉-3- carboxylicates甲基-1-芳基(杂芳基)-9- Н -β咔啉形成3-羧酸盐,其水解得到相应的1-芳基(杂芳基)-9Н -β-咔啉-3-羧酸。
Metal free one pot synthesis of β-carbolines via a domino Pictet-Spengler reaction and aromatization
A convenient and efficient metal free, atom economical flexible synthesis of β-carbolines involving a domino Pictet-Spengler reaction and aromatization in oxygen atmosphere in N-methyl-2-pyrollidone (NMP) is described. Variety of aryl, heteroaryl and aliphatic aldehydes were found to be good substrates for this methodology. Several β-carbolines (6a-6t) and β-carboline methylesters (7a-7e) were synthesized
Natural β-carboline alkaloids are ideal models for the discovery of pharmaceutically important entities. Various 1-substituted β-carbolines were synthesized from commercially inexpensive tryptophan and demonstrated significant in vitro antifungal activity against G. graminis. Significantly, compound 4m (EC50 = 0.45 μM) with carboxamide at 1-position displayed the best efficacy and nearly 20 folds enhancement
Facile and Efficient One-Pot Synthesis of β-Carbolines
作者:Jian-Guo Tang、Han Liu、Zhong-Yu Zhou、Ji-Kai Liu
DOI:10.1080/00397910903097245
日期:2010.4.26
tetrahydrocarboline 3 from tryptophan methyl ester 1 and aldehyde 2 by Pictet–Spengler reaction, followed by treatment with trichlorocyanuric acid, provides a facile and efficient route for a one-pot synthesis of β-carbolines with excellent yields.