Microwave assisted Leimgruber–Batcho reaction for the preparation of indoles, azaindoles and pyrroylquinolines
作者:Jason Siu、Ian R. Baxendale、Steven V. Ley
DOI:10.1039/b313012f
日期:——
catalysed Leimgruber-Batcho indole synthesis using microwave acceleration is described. This approach has permitted the preparation of a variety of heteroaromatic enamine intermediates in good yield and high purities. Subsequent catalytic hydrogenation reactions, under various conditions including the use of a solid-phase encapsulated catalyst, furnish the corresponding indole derivatives in good yields
Ortho-nitrotoluenes are condensed with formamide acetals to yield the corresponding otho-nitro-.beta.-aminestyrenes which undergo cyclization upon reduction to yield indoles.