Pd(II)-mediated synthesis of 2-deoxy- and rare-C-glycosides
摘要:
The synthesis of 2-deoxy-C-glycosides and rare-C-saccharides from the gamma,delta -olefinic alcohols is described. In the presence of Pd(II) reagents these olefinic alcohols undergo an efficient intramolecular oxidative cyclisation to afford the target molecules. (C) 2001 Elsevier Science Ltd. All rights reserved.
Pd(II)-mediated synthesis of 2-deoxy- and rare-C-glycosides
摘要:
The synthesis of 2-deoxy-C-glycosides and rare-C-saccharides from the gamma,delta -olefinic alcohols is described. In the presence of Pd(II) reagents these olefinic alcohols undergo an efficient intramolecular oxidative cyclisation to afford the target molecules. (C) 2001 Elsevier Science Ltd. All rights reserved.
An iron(III) salt catalyzed retro-Claisencondensation between an alcohol and a 1,3-diketone was investigated. The mechanism involves the formation of a metal-induced six-membered cyclic transition state and cleavage of the C–C bond. Regioselective esterification and one-pot conversion of silyl ethers into esters with good yields was observed. Simple reaction conditions, high yields, and broad scope