Regioselective synthesis of piperidinones by metal-catalyzed ring expansion-carbonylation reactions. Remarkable cobalt and/or ruthenium carbonyl catalyzed rearrangement and cyclization reactions
作者:Ming De Wang、Howard Alper
DOI:10.1021/ja00044a010
日期:1992.8
Carbonylation of pyrrolidines, catalyzed by cobaltcarbonyl, results in the formation of piperidinones. The reaction is regiospecific in most cases, and the yield of product is increased when rutheniumcarbonyl is present as a second catalyst. The dual catalytic system [Co 2 (CO) 8 /Ru 3 (CO) 12 ] is useful for the novel rearrangement of heterocyclic nitrogen ketones ((CH 2 ) n NCH 2 COR, n=4-7] to