Aminodifluorosulfinium tetrafluoroborate salts were found to act as efficient deoxofluorinating reagents when promoted by an exogenous fluoride source and, in most cases, exhibited greater selectivity by providing less elimination byproduct as compared to DAST and Deoxo-Fluor. Aminodifluorosulfinium tetrafluoroborates are easy handled crystalline salts that show enhanced thermal stability over dialkylaminosulfur
The synthesis of N,N-disubstituted aminodifluorosulfinium tetrafluoroborate salts is reported, and their behavior as deoxofluorinating agent was evaluated. The deoxofluorination reactions were performed using a primary alcohol, a secondary alcohol and a ketone. Results show that subtle modification of the structure of the reagents can noticeably affect the reactivity and the selectivity in deoxofluorination
A compound of formula I and a method of treatment of diseases, related to modulation of the adenosine A
2
receptor system comprising administering a compound of formula
1
to a person in need of such treatment.
1-Amino-4,4-difluorocyclohexanecarboxylic acid as a promising building block for drug discovery: design, synthesis and characterization
作者:Pavel K. Mykhailiuk、Viktoriia Starova、Vladimir Iurchenko、Svitlana V. Shishkina、Oleg V. Shishkin、Oleksandr Khilchevskyi、Olga Zaporozhets
DOI:10.1016/j.tet.2013.03.072
日期:2013.5
1-Amino-4,4-difluorocyclohexanecarboxylic acid has been designed as a fluorinated analogue of the pharmacologically relevant 1-aminocyclohexanecarboxylic acid. The synthesis has been performed in three steps from a commercially available material in 22% overall yield. An impact of fluorine atoms on conformation, lipophilicity, acidity and fluorescent properties of the amino acid has been studied. Various