Ruthenium Porphyrin Catalyzed Intramolecular Carbenoid C−H Insertion. Stereoselective Synthesis of Cis-Disubstituted Oxygen and Nitrogen Heterocycles
作者:Wai-Hung Cheung、Shi-Long Zheng、Wing-Yiu Yu、Guo-Chuan Zhou、Chi-Ming Che
DOI:10.1021/ol034806q
日期:2003.7.1
[reaction: see text] A ruthenium porphyrin-catalyzed stereoselective intramolecularcarbenoid C[bond]H insertion is described. Using [Ru(II)(TTP)(CO)] as catalyst, aryl tosylhydrazones are converted to 2,3-dihydrobenzofurans, 2,3-dihydroindoles, and beta-lactams in good yields and remarkable cis selectivity (up to 99%). Enantioselective synthesis of 2,3-dihydrobenzofurans is also achieved with [Ru(II)(D(4)-Por*)(CO)]