Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5277588 | Tetrahedron Letters | 2008 | 4 Pages |
Abstract
Helically chiral azahexahelicene 3 was prepared in four steps using the Mizoroki-Heck coupling followed by classical oxidative photodehydrocyclisation. Resolution of this new chiral system was achieved through separation by HPLC providing (â)- and (+)-3 in high optical purity. The absolute configurations of (â)- and (+)-3 were assigned as M and P, respectively, by means of circular dichroism. Each of the hexacyclic systems (M)-(â)- and (P)-(+)-3 was reacted with boron tribromide to provide the corresponding helical pyridophenols in good yields.
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Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Faouzi Aloui, Riadh El Abed, Angéla Marinetti, Béchir Ben Hassine,