“…1-Indolizinylalanine (3) has been prepared as a potential tryptophan antimetabolite; l-indolizineacetic acid (4), an analog of 3-indoleacetic acid, has shown moderate auxinic activity; and numerous alkylindolizines (5), arylindolizines (6), and alkylaminoalkylindolizines (7,8) have been synthesized and shown to influence the central nervous, system. 1-Indolizinylalanine (3) has been prepared as a potential tryptophan antimetabolite; l-indolizineacetic acid (4), an analog of 3-indoleacetic acid, has shown moderate auxinic activity; and numerous alkylindolizines (5), arylindolizines (6), and alkylaminoalkylindolizines (7,8) have been synthesized and shown to influence the central nervous, system.…”