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Re: flyersdh post# 1716

Friday, 11/09/2012 5:16:06 PM

Friday, November 09, 2012 5:16:06 PM

Post# of 195759
Nice find Flyers. It's actually for the Perk NR...

"...the present invention refers to the novel class of chromophores as "Perkinamine NR(s)", for "nitro radical(s)". In addition, while the "nitro radical" species are persistent radicals, stable under air-free conditions, we have found that a core amine functionality of these species is selectively oxidized to nitroxyl radicals which are stable under ambient conditions"

They figured out by changing the sequence of the last two steps in the "regular Perk" synthesis process, they can make Perk NR:

"In contrast to the syntheses disclosed in the prior publications, the present inventors have found it advantageous to reverse the order of the penultimate and ultimate reactions, that is to form the electron accepting group ring last. When this is done, more control can be exerted on the final reaction to yield primarily perkinamine or primarily perkinamine NR depending on the nature of the base used to scavenge acid released during the ring closure."



BTW, Dr. Arduengo and another 'Bama associate are listed as co-inventors, along with Fred Sr., Fred Jr., Andrew, Dr. Eaton, and Dr. H.E. Simmons III.

Well done guys!

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