The direct C-4 substitution of indole; an X-ray crystal structure analysis of 4-(trimethylsilyl)indole
Abstract
Indole was converted into the 1,4-diacetyl and 1-acetyl-4-(3-chloropropanoyl) derivatives by direct C-4 electrophilic substitution via 4-(trimethylsilyl)indole (3c); the structure of (3c) was confirmed by a single crystal X-ray analysis.