453-35-0Relevant articles and documents
Highly regio- and stereoselective 1,3-dipolar cycloaddition of stabilised azomethine ylides to 3,3,3-trihalogeno-1-nitropropenes: Synthesis of trihalomethylated spiroindenepyrroli(zi)dines
Barkov, Alexey Yu.,Zimnitskiy, Nikolay S.,Kutyashev, Igor B.,Korotaev, Vladislav Yu.,Moshkin, Vladimir S.,Sosnovskikh, Vyacheslav Ya.
, p. 37 - 44 (2017)
Reactions of (E)-3,3,3-trihalogeno-1-nitropropenes with stabilised azomethine ylides derived from ninhydrin and indenoquinoxalinones on the one hand, and sarcosine and proline on the other, proceed regio- and diastereoselectively to give a number of trihalomethylated spiroindenepyrrolidines and spiroindenepyrrolizidines in good yields.
6,7-DIHYDRO-4H-PYRAZOLO[1,5-A]PYRAZINE COMPOUNDS FOR THE TREATMENT OF INFECTIOUS DISEASES
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Page/Page column 44-45, (2018/03/26)
The present invention relates to compounds of the formula (I) or pharmaceutically acceptable salts, enantiomer or diastereomer thereof, wherein R1 to R4 are as described above. The compounds may be useful for the treatment or prophylaxis of hepatitis B virus infection.
The asymmetric Friedel-Crafts reaction of indoles with fluoroalkylated nitroalkenes catalyzed by chiral phosphoric acid
Lin, Jin-Hong,Xiao, Ji-Chang
supporting information; experimental part, p. 4536 - 4539 (2011/10/09)
The enantioselective Friedel-Crafts fluoroalkylation of indoles with fluoroalkylated nitroalkenes, catalyzed by chiral phosphoric acid is described. The regioselectivity of fluoroalkylated nitroalkenes is a problem worth discussing, and it was found that the carbon atom adjacent to the fluoroalkyl group is more reactive than that adjacent to NO2 group.