This TFA-catalyzed [3+2] cycloaddition of organic azides with α-fluoronitroalkenes, used as synthetic surrogates of α-fluoroalkynes, provides a new route to multi-substituted fluorotriazoles with broader substrate scopes and high regioselectivity.

IN an investigation of the inethylation of (+)the basis of chemical correlations that this acid, pulegone, Djerassi ct nl,l employed the quasi-and hence ( +) -2-isopropyl-2-methylsuccinic acid racemate technique to deduce that (+)-2-iso-which occupies a key position in the definition of propyl-2-methylglutaric acid had the absolute the absolute configuration of numerous terpenes configuration (I). However, in an independent including ( + ) -~a m p h o r , ~ had the opposite coninvestigation concerning the absolute stereo-figuration (11). This contradiction has now been chemistry of various terpencs, Norin2 concluded on resolved in favour of ( 11) by an X-ray arbitration.

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