The facile preparation of primary and secondary amines via an improved Fukuyama–Mitsunobu procedure. Application to the synthesis of a lung-targeted gene delivery agent
The facile preparation of primary and secondary amines via an improved Fukuyama–Mitsunobu procedure. Application to the synthesis of a lung-targeted gene delivery agent
Nickel-Catalyzed Denitrogenative Cyclization of 1,2,3,4-Benzothiatriazin-1,1(2<i>H</i>)-dioxides with Arynes To Synthesize Biaryl Sultams
作者:Vijaykumar H. Thorat、Yu-Lin Tsai、Yong-Ran Huang、Chien-Hong Cheng、Jen-Chieh Hsieh
DOI:10.1021/acs.orglett.2c00920
日期:2022.4.22
Herein, we report the nickel-catalyzed denitrogenative cyclization reaction of 1,2,3,4-benzothiatriazine-1,1-dioxides with arynes to generate the polysubstituted biaryl sultams with tolerance of a wide diversity of substituents on every subunit. The mechanistic study indicates that the reaction is initiated by the formation of a diradical species, which reacts with a nickel complex to form a nickelacycle
The compounds of the following formula:
wherein Ar, R and R
1
have the meanings given in the specification. This series of sulfonamido derivatives with a conserved uronamide group at the 5′ position provide superior A3 receptor affinity as well as selectivity. These new adenosine agonists are sulfonamido derivatives N-substituted with aliphatic groups (cyclic or linear) or aromatic radicals.
The present invention provides compounds of the formula
wherein Ar, R and R
1
have a meaning as defined herein in the specification. Compounds of formula (I) are agonists of the A
3
adenosine receptor and, thus, may be employed for the treatment of conditions mediated by the A
3
adenosine receptor. Accordingly, the compounds of formula (I) may be employed for treatment of behavioral depression, cerebral ischemia, hypotension, chemically induced seizures, inflammatory diseases, asthma, and cancer diseases expressing the adenosine A
3
receptor.