e.g. Filippa Pettersson or Cancer Res. 75(6) , 1102-12, (2015) or 10.1002/anie.201600521
Regiospecific Bromination of 3-Methylindoles with NBS and Its Application to the Concise Synthesis of Optically Active Unusual Tryptophans Present in Marine Cyclic …
R Liu, P Zhang, T Gan, JM Cook
Index: Liu, Ruiyan; Zhang, Puwen; Gan, Tong; Cook, James M. Journal of Organic Chemistry, 1997 , vol. 62, # 21 p. 7447 - 7456
A regiospecific bromination of substituted 3-methylindoles at either the C (3) alkyl moiety or the C (2) position was achieved via a free radical bromination or electrophilic process, respectively. The regiospecificity of the bromination could be controlled by variation of both the substituent and the N (1) protecting group on the indole ring. In addition, enantiospecific syntheses of 5-methoxytryptophan (20) and 5-hydroxy-6-chlorotryptophan (21c) as well as ...
