Ortho-lithiation with t-BuLi of the Boc-protected amine followed by addition of a Weinreb amide gave the 2-alkyl substituted 5-azaindole in good yield: J. Heterocycl. Chem., 29, 359 (1992), whereas DMF gave 6-azaindole in high yield: Synthesis, 877 (1996). 2-Substituted 6-azaindoles have also been synthesized in one step by direct dilithiation with s-BuLi, followed by reaction with an ester: J. Org, Chem., 70, 6512 (2005)./n
Indicaciones de peligro (UE): H301-H311-H315-H319-H335
Toxic if swallowed. Toxic in contact with skin. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Indicaciones de precaución: P260-P201-P280h-P304+P340-P405-P501a
Do not breathe dust/fume/gas/mist/vapours/spray. Obtain special instructions before use. Wear protective gloves/clothing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.