Stereospecific Nucleophilic Substitution of Enantioenriched Tertiary Benzylic Amines via in Situ Activation with Benzyne
作者:Yang Gui、Shi-Kai Tian
DOI:10.1021/acs.orglett.7b00365
日期:2017.4.7
A one-pot protocol has been developed for sequential benzyne activation and nucleophilicsubstitution of enantioenriched tertiary benzylic amines. In the presence of 2-(trimethylsilyl)phenyl triflate and CsF, a range of enantioenriched tertiary benzylic amines were substituted by various nucleophiles, delivering structurally diverse benzylic compounds in moderate to excellent yields with excellent
A highly efficient Ru catalyst based on an achiral, very simple, and inexpensive amino alcohol ligand (2‐amino‐2‐methylpropan‐1‐ol) has been developed for the asymmetric transfer hydrogenation (ATH) of chiralN‐(tert‐butylsulfinyl)imines. This complex is able to catalyze the ATH of both aromatic and the most challenging aliphatic sulfinylimines by using isopropyl alcohol as the hydrogen source. The
Asymmetric Synthesis of Chiral Primary Amines by Transfer Hydrogenation of <i>N</i>-(<i>tert</i>-Butanesulfinyl)ketimines
作者:David Guijarro、Óscar Pablo、Miguel Yus
DOI:10.1021/jo101057s
日期:2010.8.6
The diastereoselective reduction of (R)-N-(tert-butanesulfinyl)ketimines by a ruthenium-catalyzed asymmetrictransferhydrogenation process in isopropyl alcohol, followed by desulfinylation of the nitrogen atom, is an excellent method to prepare highly enantiomerically enriched α-branched primary amines (up to >99% ee) in short reaction times (1−4 h). (1S,2R)-1-Amino-2-indanol has been shown to be
Identification of (S)-selective transaminases for the asymmetric synthesis of bulky chiral amines
作者:Ioannis V. Pavlidis、Martin S. Weiß、Maika Genz、Paul Spurr、Steven P. Hanlon、Beat Wirz、Hans Iding、Uwe T. Bornscheuer
DOI:10.1038/nchem.2578
日期:2016.11
to 8,900-fold higher activity than the starting scaffold and are highly stereoselective (up to >99.9% enantiomeric excess) in the asymmetricsynthesis of a set of chiralamines bearing bulky substituents. These enzymes should therefore be suitable for use in the synthesis of a wide array of potential intermediates for pharmaceuticals. We also show that the motif can be engineered into other protein
The present invention relates to the manufacture of the compounds of formula (I)
said compounds of formula (I) being valuable intermediates in the manufacture of Dolastatin 10 analogues, which are useful in the treatment of cancer.