Synthesis of β-Lactams by Palladium(0)-Catalyzed C(sp<sup>3</sup>)−H Carbamoylation
作者:David Dailler、Ronan Rocaboy、Olivier Baudoin
DOI:10.1002/anie.201703109
日期:2017.6.12
A general and user‐friendly synthesis of β‐lactams is reported that makes use of Pd0‐catalyzed carbamoylation of C(sp3)−H bonds, and operates under stoichiometric carbon monoxide in a two‐chamber reactor. This reaction is compatible with a range of primary, secondary and activated tertiary C−H bonds, in contrast to previous methods based on C(sp3)−H activation. In addition, the feasibility of an enantioselective
Proline-Based P,O Ligand/Iridium Complexes as Highly Selective Catalysts: Asymmetric Hydrogenation of Trisubstituted Alkenes
作者:Denise Rageot、David H. Woodmansee、Benoît Pugin、Andreas Pfaltz
DOI:10.1002/anie.201104105
日期:2011.10.4
O joins the mix: P,O ligands (L1) form efficient iridiumcatalysts for the asymmetric hydrogenation of olefins. The proline‐derived ligands lead to high enantioselectivities with several classes of alkenes, most notably with α,β‐unsaturated carboxylic esters and ketones, where they match or even surpass the ee values reported for the best N,P and C,N ligands.
Preparation of quinoline-substituted carbonate and carbamate derivatives
申请人:——
公开号:US20020013468A1
公开(公告)日:2002-01-31
The invention relates to a process for preparing quinoline-substituted carbonate and carbamate compounds, which are important intermediates in the synthesis of 6-O-substituted macrolide antibiotics. The process employs metal-catalyzed coupling reactions to provide a carbonate or carbamate of formula (I) or (II) or a substrate that can be reduced to obtain the same.
Synthesis and influenza virus sialidase inhibitory activity of analogues of 4-Guanidino-Neu5Ac2en (Zanamivir) modified in the glycerol side-chain
作者:David M Andrews、Peter C Cherry、David C Humber、Paul S Jones、Steven P Keeling、Paul F Martin、Caroline D Shaw、Stephen Swanson
DOI:10.1016/s0223-5234(00)80026-4
日期:1999.7
Analogues of 4-Guanidino-Neu5Ac2en (Zanamivir) have been prepared containing carbamate substituents at the 7-hydroxy position. (4S,5R,6R)-5-Acetylamino-6-[1R-[(6-aminohexyl)carbamoyloxy]-2R,3-dihydroxypropyl]-4-guanidino-5,6-dihydro-4H-pyran-2carboxylic acid and (4S,5R,6R)-5-Acetylamino-6-[1R-[heptylcarbamoyloxy]-2R,3-dihydroxypropyl]-4-guanidino-5,6-dihydro4H-pyran2-carboxylic acid were the two analogues
[EN] PREPARATION OF QUINOLINE-SUBSTITUTED CARBONATE AND CARBAMATE DERIVATIVES<br/>[FR] PREPARATION DE DERIVES DE CARBONATE ET DE CARBAMATE A SUBSTITUTION QUINOLINE
申请人:ABBOTT LAB
公开号:WO2001000582A1
公开(公告)日:2001-01-04
The invention relates to a process for preparing quinoline-substituted carbonate and carbamate compounds, which are important intermediates in the synthesis of 6-O-substituted macrolide antibiotics. The process employs metal-catalyzed coupling reactions to provide a carbonate or carbamate of formula (I) or (II) or a substrate that can be reduced to obtain the same.