Diastereoselective Rh-Mediated Construction of 2,3,5-Trisubstituted Tetrahydrofurans
摘要:
Dirhodium(II) carboxylate catalyzed cyclization of a series of gamma-alkoxy-alpha-diazo esters 1 has been shown to proceed with substantial diastereoselectivity, producing the 2,3,5-trisubstituted tetrahydrofurans 2 and 3. The diastereoselectivity of the cyclization improved as the electron-withdrawing ability of the substituent R increased. A mechanistic hypothesis is presented.
Diastereoselective Rh-Mediated Construction of 2,3,5-Trisubstituted Tetrahydrofurans
摘要:
Dirhodium(II) carboxylate catalyzed cyclization of a series of gamma-alkoxy-alpha-diazo esters 1 has been shown to proceed with substantial diastereoselectivity, producing the 2,3,5-trisubstituted tetrahydrofurans 2 and 3. The diastereoselectivity of the cyclization improved as the electron-withdrawing ability of the substituent R increased. A mechanistic hypothesis is presented.
2,3,5-trisubstituted tetrahydrofurans by Rh-mediated cyclization of an α-diazo ester
作者:Douglass F. Taber、Ying Song
DOI:10.1016/0040-4039(95)00346-e
日期:1995.4
Dirhodium(II) carboxylate catalyzed cyclization of a gamma-alkoxy-alpha-diazo ester 1 was found to proceed with substantial diasatereoselectivity, producing the 2,3,5-trisubstituted tetrahydrofurans 2a and 2b in a ratio of 4 : 1.
Diastereoselective Rh-Mediated Construction of 2,3,5-Trisubstituted Tetrahydrofurans
作者:Douglass F. Taber、Ying Song
DOI:10.1021/jo960758u
日期:1996.1.1
Dirhodium(II) carboxylate catalyzed cyclization of a series of gamma-alkoxy-alpha-diazo esters 1 has been shown to proceed with substantial diastereoselectivity, producing the 2,3,5-trisubstituted tetrahydrofurans 2 and 3. The diastereoselectivity of the cyclization improved as the electron-withdrawing ability of the substituent R increased. A mechanistic hypothesis is presented.