Anionic N-Fries Rearrangement of N-Alkyl-2-iodo Anilides Induced by Iodine−Magnesium Exchange: Application for Synthesis of Strained 1,2,3-Trisubstituted Indoles
摘要:
A superior, mild, high-yielding one-pot process for rapid access to oxo anilides has been developed that involves three cascade reactions: iodine-magnesium exchange, regiospecific ortho N-Fries rearrangement, and in situ trapping of the formed aniline anion. Coupled with McMurry cyclization, the two-step process allows ready synthesis of strained 1,2,3-trisubstituted indoles regioselectively.