Divergent Enantioselective Synthesis of (−)-Galanthamine and (−)-Morphine
作者:Barry M. Trost、Weiping Tang、F. Dean Toste
DOI:10.1021/ja054449+
日期:2005.10.1
tricyclic intermediate is available in six steps from 2-bromovanillin and the monoester of methyl 6-hydroxycyclohexene-1-carboxylate. This intermediate requires only two steps to convert to (-)-galanthamine. Using a Heck vinylation, we found that the fourth ring of codeine/morphine could be formed. The final ring formation involves a novel visible light-promoted hydroamination. Thus, six steps are required
[EN] INHIBITORS OF VIRAL REPLICATION, THEIR PROCESS OF PREPARATION AND THEIR THERAPEUTICAL USES<br/>[FR] INHIBITEURS DE RÉPLICATION VIRALE, LEUR PROCÉDÉ DE PRÉPARATION ET LEURS UTILISATIONS THÉRAPEUTIQUES
申请人:BIODIM LAB
公开号:WO2012140243A1
公开(公告)日:2012-10-18
The present invention relates to compounds, their use in the treatment or the prevention of viral disorders, including HIV.
Brønsted Acid Catalyzed Asymmetric Aldol Reaction: A Complementary Approach to Enamine Catalysis
作者:Guillaume Pousse、Fabien Le Cavelier、Luke Humphreys、Jacques Rouden、Jérôme Blanchet
DOI:10.1021/ol101176j
日期:2010.8.20
A syn-enantioselective aldolreaction has been developed using Brønstedacidcatalysis based on H8-BINOL-derived phosphoric acids. This method affords an efficient synthesis of various β-hydroxy ketones, some of which could not be synthesized using enamine organocatalysis.
Chitosan Aerogel Beads as a Heterogeneous Organocatalyst for the Asymmetric Aldol Reaction in the Presence of Water: An Assessment of the Effect of Additives
The catalytic properties of chitosan aerogel for the direct asymmetric aldol reaction in water assisted by various surfactants and acid co-catalysts have been evaluated by employing a range of donor and acceptor systems. A beneficial effect on both the yields and nantioselectivities was observed, and the combination of surfactants and acid co-catalysts has proven particularly useful in the case of