Novel ruthenium-catalyzed cleavage of allyl protecting group in lactams
摘要:
A convenient and general method of synthesis of NH-lactams via Grubbs' carbene promoted isomerization of the respective N-allyl lactams followed by RuCl3-catalyzed enamide cleavage has been developed. (C) 2003 Elsevier Ltd. All rights reserved.
General and efficient synthesis of β-lactams bearing a quinone moiety at N1, C3 or C4 positions
作者:Benito Alcaide、Pedro Almendros、Nati R Salgado
DOI:10.1016/s0040-4039(00)02298-x
日期:2001.2
A general and efficient synthesis of cis- and trans-β-lactams bearing a quinone moiety at N1, C3 or C4 positions has been developed in a racemic form. In some cases this methodology offers the possibility of achieving the 2-azetidinone-quinone in an optically pure form.
A Practical Ruthenium-Catalyzed Cleavage of the Allyl Protecting Group in Amides, Lactams, Imides, and Congeners
作者:Benito Alcaide、Pedro Almendros、Jose M. Alonso
DOI:10.1002/chem.200501227
日期:2006.3.20
deprotection of N-allylic amide-like moieties was developed. The first examples accounting for the ruthenium-catalyzed deallylation of amides, lactams, imides, pyrazolidones, hydantoins, and oxazolidinones have been achieved by the sequential use of Grubbs carbene (isomerization step) and RuCl(3) (oxidation step). A variety of substrates, including enantiopure multifunctional beta- and gamma-lactams, can
Novel ruthenium-catalyzed cleavage of allyl protecting group in lactams
作者:Benito Alcaide、Pedro Almendros、José M. Alonso
DOI:10.1016/j.tetlet.2003.09.165
日期:2003.11
A convenient and general method of synthesis of NH-lactams via Grubbs' carbene promoted isomerization of the respective N-allyl lactams followed by RuCl3-catalyzed enamide cleavage has been developed. (C) 2003 Elsevier Ltd. All rights reserved.