A quinoline alkaloid rich Quisqualis indica floral extract enhances the bioactivity. Issue 10 (19th May 2021)

• Record Type: Journal Article
• Authors: Rout, Prasant Kumar; Kumar, Prashant; Rao, Y. Ramachandra; Kumar, Anant; Bawankule, Dnyaneshwar U.; Singh, Ruchi; Singh, Kijay Bahadur; Chanotiya, Chandan Singh; Naik, S. N.
• Is Part Of: Natural product research. Volume 35:Issue 10(2021)
• Page Start: 1632
• Page End: 1638
• Publication Date: 2021-05-19
• Subjects: Quisqualis indica -- HS-SPME -- Essential oil -- Absolute -- Quinoline-4-carbonitrile -- Pd/Ac Catalyst -- Anti-inflammatory; Natural products -- Periodicals; Natural products -- Research -- Periodicals; Biological Factors -- Periodicals; Biological Products -- Periodicals; 547
• DOI: 10.1080/14786419.2019.1634709
• Languages: English
• ISSNs: 1478-6419

Abstract

Abstract: A volatile alkaloid quinoline-4-carbonitrile (QCN) was isolated from the floral extract of Quisqualis indica . Major compounds were trans -linalool oxide (1.0, 4.5%), methyl benzoate (1.0, 4.0%), 2, 2, 6-trimethyl-6-vinyl-tetrahydropyran-3-one (7.4, 17.8%), 2, 2, 6-trimethyl-6-vinyl-tetrahydropyran-3-ol (1.0, 1.2%), ( E, E )-α-farnesene (29.1, 16.1%), QCN (5.7, 1.3%) in live and picked flowers, respectively. Flower compositions were altered due to change in enzymatic reaction at the time of picking. Some rearrangements of oxygenated terpenoids occurred in the process of hydrodistillation to obtain essential oil. Chemical synthesis of QCN and its selectively reduced products derived from QCN were prepared through green reaction process. The catalytic modification of QCN has produced quinoline-4-methylamine; the later compound has shown enhanced bio-activities. QCN and floral extract (absolute) have shown potential anti-inflammatory and antioxidant activities. Besides, floral absolute has shown significant anti-inflammatory and antioxidant activities due to improved QCN (19.7%) content to synergize amongst terpenoids and benzenoids as compared to the essential oil with 1.1% of QCN. GRAPHICAL ABSTRACT: