[EN] (6R,10R)-6,10,14-TRIMETYLPENTADECAN-2-ONE PREPARED FROM 3,7-DIMETYLOCT-2-ENAL OR 3,7-DIMETYLOCTA-2,6-DIENAL [FR] (6R,10R)-6,10,14-TRIMÉTHYLPENTADÉCAN-2-ONE PRÉPARÉE À PARTIR DE 3,7-DIMÉTHYLOCT-2-ÉNAL OU 3,7-DIMÉTHYLOCTA-2,6-DIÉNAL
PROCESS OF ASYMMETRIC HYDROGENATION OF KETALS AND ACETALS
申请人:DSM IP ASSETS B.V.
公开号:US20160185683A1
公开(公告)日:2016-06-30
The present invention relates to a process of the asymmetric hydrogenation of a ketal of an unsaturated ketone or an acetal of an unsaturated aldehyde by molecular hydrogen in the presence of at least one chiral iridium complex. This process yields chiral compounds in a very efficient way and is very advantageous in that the amount of iridium complex can be remarkably reduced.
Natural deep eutectic solvents promote low-impact acetalization reactions on a wide range of substrates. The reaction medium is fully recycled without weakening of the catalytic activity up to ten times.
Conversion of Substrate Analogs Suggests a Michael Cyclization in Iridoid Biosynthesis
作者:Stephanie Lindner、Fernando Geu-Flores、Stefan Bräse、Nathaniel H. Sherden、Sarah E. O’Connor
DOI:10.1016/j.chembiol.2014.09.010
日期:2014.11
The core structure of the iridoid monoterpenes is formed by a unique cyclization reaction. The enzyme that catalyzes this reaction, iridoid synthase, is mechanistically distinct from other terpene cyclases. Here we describe the synthesis of two substrate analogs to probe the mechanism of iridoid synthase. Enzymatic assay of these substrate analogs along with clues from the product profile of the native substrate strongly suggest that iridoid synthase utilizes a Michael reaction to achieve cyclization. This improved mechanistic understanding will facilitate the exploitation of the potential of iridoid synthase to synthesize new cyclic compounds from nonnatural substrates.
(6R,10R)-6,10,14-TRIMETYLPENTADECAN-2-ONE PREPARED FROM 3,7-DIMETYLOCT-2-ENAL OR 3,7-DIMETYLOCTA-2,6-DIENAL
申请人:DSM IP Assets B.V.
公开号:EP2935191A1
公开(公告)日:2015-10-28
PREPARATION OF (6R,10R)-6,10,14-TRIMETYLPENTADECAN-2-ONE FROM 3,7-DIMETYLOCT-2-ENAL OR 3,7-DIMETYLOCTA-2,6-DIENAL