PHOSPHORAMIDITE LIGAND AND PRODUCTION METHOD OF ALLYLIC AMINE USING THE SAME
申请人:CARREIRA Erick M.
公开号:US20090054689A1
公开(公告)日:2009-02-26
The present invention provides a production method of an allylic amine represented by the formula (III):
wherein R
3
is as defined in the specification,
which comprises reacting by an allylic alcohol represented by the formula (II):
wherein R
3
is as defined in the specification,
with sulfamic acid, in the presence of a phosphoramidite ligand represented by the formula (I):
wherein each symbol is as defined in the specification, and an iridium complex. According to the present invention, a primary allylic amine can be produced directly from an allylic alcohol, without use of an activator for an allylic alcohol and conversion of an allylic alcohol into an activated compound thereof.
Rapid Identification of a Scalable Catalyst for the Asymmetric Hydrogenation of a Sterically Demanding Aryl Enamide
作者:Laurent Lefort、Jeroen A. F. Boogers、Thijs Kuilman、Robert Jan Vijn、John Janssen、Harrie Straatman、Johannes G. de Vries、André H. M. de Vries
DOI:10.1021/op100011y
日期:2010.5.21
High throughput screening was used to find a cost-effective and scalable catalyst for the asymmetrichydrogenation of a sterically demanding enamide as an intermediate towards a new potent melanocortin receptor agonist useful in the treatment of obesity. Lessons drawn from the testing of a first library of 96 chiral monodentate phosphoramidites led to the design of a second focused library of 16 chiral
Cobalt-Catalyzed Enantioselective Directed C–H Alkylation of Indole with Styrenes
作者:Pin-Sheng Lee、Naohiko Yoshikai
DOI:10.1021/ol503119z
日期:2015.1.2
A cobalt-chiral phosphoramidite catalyst promotes enantioselective imine-directed C2-alkylation of Boc-protected indoles with styrenes. The reaction affords 1,1-diarylethane products in moderate to good yields with good enantioselectivities under mild conditions. A deuterium-labeling experiment suggests that the enantioselectivity is controlled by both the styrene insertion and the C-C reductive elimination steps.
US7863443B2
申请人:——
公开号:US7863443B2
公开(公告)日:2011-01-04
On the Asymmetric Iridium‐Catalyzed N‐Allylation of Amino Acid Esters: Improved Selectivities through Structural Variation of the Chiral Phosphoramidite Ligand
The ligand makes the difference: A new chiral phosphoramidite ligand allows to perform the Ir-catalyzed N-allylation of amino acid esters with unsurpassed stereoselectivity employing readily accessible branched (racemic) allyl carbonates.
配体与众不同:一种新的手性亚磷酰胺配体允许使用易于获得的支链(外消旋)碳酸烯丙酯以无与伦比的立体选择性对氨基酸酯进行 Ir 催化的 N-烯丙基化。