Alkylation of Rhodium Porphyrins Using Ammonium and Quinolinium Salts
摘要:
Alkylation of rhodium(III) porphyrins [Rh-II(por)] was achieved under relatively mild conditions in up to 98% yields, where readily available ammonium and quinolinium salts were utilized as the alkylating agents. This transformation tolerates air and water, thus serving as a convenient method to prepare a variety of alkyl- and benzyl-Rh-III(por) complexes. Preliminary mechanistic studies support an S(N)2-like reaction pathway involving a Rh-I(por) anion intermediate.