Ja. Zoltewicz et Mp. Cruskie, TOTAL SYNTHESIS OF THE INCORRECTLY PROPOSED QUATERPYRIDINE ISOLATED FROM THE HOPLONEMERTINE SEA WORM, Tetrahedron, 51(42), 1995, pp. 11401-11410
Quaterpyridine 1 was synthesized for the first time using palladium-ca
talyzed cross-coupling reactions. Its proton NMR spectrum shows that i
s not the natural product called nemertelline isolated from nemertine
marine worms as claimed in 1976.