indole synthesis Baeyer–Emmerling indole synthesis An indole synthesis where an ortho-nitrocinnamic acid reacts with iron powder in a basic solution to form an indole. NAMERXN:4.1.41 RXNO RXNO:0000632 https://doi.org/10.1002/cber.186900201268 https://www.wikidata.org/wiki/Q3159940