Rate constants for aryl radical cyclization to aldimines: synthesis of tetrahydroisoquinolines by fast 6-endo closures to carbon
摘要:
Aryl radicals cyclize to an imino functional group in a competition involving 6-endo closure to C and 5-exo closure to N. There is a large 6-endo preference forming tetrahydroisoquinolinyl radicals with k6-endo (80-degrees-C) > 10(8)s-1.