118535-37-8Relevant articles and documents
REACTIONS ON SOLID SUPPORTS PART IV: REACTIONS OF αβ-UNSATURATED CARBONYL COMPOUNDS WITH INDOLES USING CLAY AS CATALYST
Iqbal, Zafar,Jackson, Anthony H.,Nagaraja Rao, K. R.
, p. 2577 - 2580 (2007/10/02)
Indoles react with αβ-unsaturated carbonyl compounds in the presence of clay catalysts to give substituted indoles in good yields; in one case a 3-benzyl substituent already present migrated to the 2-position, being displaced by the incoming electrophile, thus confirming that electrophilic substitution in indole occurs primarily at the 3-position.