strategy for the synthesis of 1,3,4-oxadiazoles was established through direct annulation of hydrazides with methylketones. It was found that the use of K2CO3 as a base achieves an unexpected and highly efficient C–C bondcleavage. This reaction is proposed to go through oxidativecleavage of Csp3–H bonds, followed by cyclization and deacylation.
通过将酰肼与甲基酮直接环合,建立了一种合成1,3,4-恶二唑的新策略。发现使用K 2 CO 3作为碱可以实现意想不到且高效的C–C键裂解。建议该反应通过C sp 3 -H键的氧化裂解,然后环化和脱酰基。
Greener and rapid access to bio-active heterocycles: one-pot solvent-free synthesis of 1,3,4-oxadiazoles and 1,3,4-thiadiazoles
作者:Vivek Polshettiwar、Rajender S. Varma
DOI:10.1016/j.tetlet.2007.11.165
日期:2008.1
A novel one-pot solvent-free synthesis of 1,3,4-oxadiazoles and 1,3,4-thiadiazoles by condensation of acid hydrazide and triethyl orthoalkanates under microwave irradiations is reported. This green protocol was catalyzed efficiently by solid supported Nafion®NR50 and phosphorus pentasulfide in alumina (P4S10/Al2O3) with excellent yields.
BIARYL PDE4 INHIBITORS FOR TREATING PULMONARY AND CARDIOVASCULAR DISORDERS
申请人:Singh Jasbir
公开号:US20090136473A1
公开(公告)日:2009-05-28
The present invention relates to a genus of biaryl compounds containing at least one further ring. The compounds are PDE4 inhibitors useful for the treatment and prevention of stroke, myocardial infarct and cardiovascular inflammatory diseases and disorders. The compounds have general formula Ia, Ib, Ic or Id:
A particular embodiment is
SMALL MOLECULE INHIBITORS OF SUPEROXIDE DISMUTASE EXPRESSION
申请人:Northwestern University
公开号:US20160214969A1
公开(公告)日:2016-07-28
Disclosed are new small molecules and the uses thereof for inhibiting superoxide dismutase (SOD) expression. Also disclosed are pharmaceutical compositions comprising the small molecule inhibitors which may be administered in methods of treating diseases or disorders associated with elevated SOD expression or activity, including neurological diseases and disorders such as amyotrophic lateral sclerosis (ALS).
Cephem derivatives and antimicrobial agents containing the same
申请人:KATAYAMA SEIYAKUSYO CO. Ltd.
公开号:EP0641797A1
公开(公告)日:1995-03-08
Herein disclosed are novel cephem compounds represented by the following general formula (I), and antimicrobial agents which contains at least one of such novel cephem compounds as an active ingredient.