Synthesis of Substituted Pyrrolin-4-ones from Amino Acids in Mild Conditions via a Gold-Catalyzed Approach
作者:Nicolas Gouault、Myriam Le Roch、Carole Cornée、Michèle David、Philippe Uriac
DOI:10.1021/jo900693a
日期:2009.8.7
The gold-catalyzedcyclization of various α-amino-ynone derivatives gave the corresponding pyrrolin-4-ones in high yields. Moreover, the use of gold(III) oxide as catalyst allows a moderate to total stereocontrol during the cyclization. These pyrrolin-4-ones are highly useful intermediates for the synthesis of functionalized pyrrolidines and other natural products.
Stereoselective synthesis of the right-hand heteroaromatic macrocycle of diazonamide A features C16–C18 bond formation in the Suzuki–Miyaura cross-coupling and atropodiastereoselective Dieckmann-type macrocyclization as key steps. The Suzuki–Miyaura cross-coupling gave the best yields when it was catalyzed by a palladium–dioxygen complex.