Atom-Economical Route to Substituted Pyridines via a Scandium Imide
摘要:
Taking advantage of a tautomerization process between (PNP)Sc=N(DIPP)(NC5H5) (PNP = N[2-P(CHMe2)(2)-4-methylphenyl](2)(-), DIPP = 2,6-iPr(2)C(6)H(3)) and (PNP)Sc(NH-(DIPP))(eta(2)-NC5H4) (1), we demonstrate in this work that pyridine can be both activated and functionalized with isonitriles (in one case catalytically) to ultimately afford mono- and bis-imino-substituted pyridines. Several intermediates in the cycle have been isolated and characterized.