Pd-Catalyzed cyclization reactions of acetylene-containing α-amino acids
摘要:
Acetylene-containing amino acids, obtained in enantiopure form via an enzymatic resolution process, serve as versatile intermediates in the synthesis of various highly functionalized heterocycles. The key transformations, intramolecular OC- and NC-bond formation, proceed via Pd-catalysis. (C) 1998 Elsevier Science Ltd. All rights reserved.
acetylene-containing α-aminoacids were used as versatile starting materials for the synthesis of a variety of heterocycles via Pd-mediated cyclization reactions. Depending on the protecting group strategy, both the carboxylate and the amine function of the amino acids could participate in the cyclizations, thus giving rise to oxygen heterocycles (α-aminolactones) and nitrogen heterocycles (cyclic α-aminoacid derivatives)