41014-43-1Relevant articles and documents
Polarized ketene dithioacetals-versatile synthons for different heterocycles
Venkatesh,Premakumari,Padmaja,Padmavathi
, p. 1886 - 1892 (2012)
The reactivity of polarized ketene dithioacetals to develop a variety of heterocycles under different conditions was studied.
Synthesis and antioxidant activity of a new class of bis and tris heterocycles
Padmavathi, Venkatapuram,Venkatesh, Bhumireddy Chinnachennaiahgari,Muralikrishna, Akkarapalli,Padmaja, Adivireddy
, p. 745 - 752 (2012)
A series of novel heterocycles, bisbenzoxazolyl/benzothiazolyl/ benzimidazolyl pyrazoles/isoxazoles/pyrimidines were synthesized and evaluated for their antioxidant activity. The bisbenzoxazolylisoxazole 10 exhibited good antioxidant activity when compared with the standard ascorbic acid.
Excited-state intramolecular single and double proton transfer emission of 2,5-bis(benzoxazol-2-yl)thiophene-3,4-diol
Hao, Yongchao,Chen, Yi
, p. 186 - 190 (2016)
In this work, excited-state intramolecular single proton transfer emission (S-PTE) and double proton transfer emission (D-PTE) are presented by employing 2,5-bis(benzoxazol-2-yl)thiophene-3,4-diol (1) as a prototype. 1 has been strategically designed and synthesized in an aim to explore single proton transfer and double proton transfer in the excited state. In solution 1 exhibits the lowest lying S0 → S1 absorption at ~395 nm. Upon excitation, two large Stokes shifted emission bands maximized at 475 nm and 550 nm are resolved, which are ascribed to the tautomer emission resulting from single proton transfer and double proton transfer isomers, respectively. It is found that solvents have greatly influenced on excited-state intramolecular proton transfer emission.
Benzoxazole derivative and preparation method and application thereof
-
Paragraph 0062-0065, (2019/04/17)
The invention provides a benzoxazole derivative and a preparation method and application thereof. Studies discover that the benzoxazole derivative provided herein has good P2Y14 inhibitory activity and anti-inflammatory activity, and is suitable for the p
Synthesis of Benzazolyl Pyrimidines Under Ultrasonication and Their Antimicrobial Activity
Kayathi, Narendra Babu,Sowmya, Donthamsetty V.,Adivireddy, Padmaja,Venkatapuram, Padmavathi
, p. 1024 - 1032 (2018/02/21)
(1) The benzoxazolyl/benzothiazolyl/benzimidazolyl pyrimidines were prepared under ultrasonication in the presence of pyridine/dimethylaminopyridine and triethylamine. (2) Better yields were recorded in 4-(N,N-dimethylamino)pyridine and Et3N. (3) The presence of electron withdrawing chloro, bromo, and nitro substituents enhanced antimicrobial activity (13c, 13e, 14e: minimum inhibitory concentration?=?6.25?μg/well against Bacillus subtilis; 13e, 14e: minimum inhibitory concentration?=?6.25?μg/well against Aspergillus niger).