Photoredox Catalysis Enables Decarboxylative Cyclization with Hypervalent Iodine(III) Reagents: Access to 2,5-Disubstituted 1,3,4-Oxadiazoles
作者:Jian Li、Xue-Chen Lu、Yue Xu、Jin-Xia Wen、Guo-Quan Hou、Li Liu
DOI:10.1021/acs.orglett.0c03663
日期:2020.12.18
A novel approach to 2,5-disubstituted 1,3,4-oxadiazoles derivatives via a decarboxylative cyclization reaction by photoredox catalysis between commercially available α-oxocarboxylic acids and hypervalent iodine(III) reagent is described. This powerful transformation involves the coupling reaction between two different kinds of radical species and the formation of C–N and C–O bonds.
(3-(4-(AMINOMETHYL)PHENOXY OR PHENYLTHIO)AZETIDIN-1-YL)(5-PHENYL-1,3,4-OXADIAZOL-2-YL)METHANONE COMPOUNDS
申请人:Bökman-Winiwarter Susanne Doris Margit
公开号:US20120010189A1
公开(公告)日:2012-01-12
Disclosed herein are azetidinyl compounds of formula I,
as described herein, pharmaceutical compositions comprising an azetidinyl compound, and a method of using an azetidinyl compound in the treatment or prophylaxis of a melanin-concentrating hormone related disease or condition.
<i>N</i>-Heterocyclic Carbene-Catalyzed Cyclization of Aldehydes with α-Diazo Iodonium Triflate: Facile Access to 2,5-Disubstituted 1,3,4-Oxadiazoles
作者:Hang Huang、Xianghua Zou、Si Cao、Zhihong Peng、Yingying Peng、Xi Wang
DOI:10.1021/acs.orglett.1c01128
日期:2021.6.4
novel organocatalytic process for synthesis of complex 1,3,4-oxadiazoles from readily accessible aldehydes. By exploiting the nucleophilicity of the putative Breslow intermediate and the inherent electrophilicity of α-diazo iodoniumtriflate, we have found that N-heterocyclic carbene catalyst promotes efficient cyclization of various aldehydes and α-diazo iodoniumtriflates. The reaction proceeds under
This invention relates to a cyanotriazole compound represented by the formula (1):, wherein each symbols are defined in the specification, or a salt thereof. The compound or a salt thereof stimulates the citric acid cycle activity and/or improves hyperglycemia with less side effects, and excellent safety, and therefore, it is useful for treating and/or preventing diseases or disorders on which citric acid cycle activation and/or improvement of hyperglycemia has a prophylactic and/or therapeutic effect, for example, diabetes, impaired glucose tolerance, insulin resistance, diabetic complications, obesity, dyslipidemia, hepatic steatosis, atherosclerosis and/or cardiovascular disease, as well as diseases or disorders that would benefit from stimulating energy expenditure.