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P-stereogenic PNP pincer-Pd catalyzed intramolecular hydroamination of amino-1,3-dienes†
Zehua Yang,Chao Xia,Delong Liu,Yangang Liu,Masashi Sugiya
Organic & Biomolecular Chemistry Pub Date : 01/05/2015 00:00:00 , DOI:10.1039/C4OB02402H
Abstract

A new P-stereogenic PNP pincer-Pd complex was readily prepared from optically pure 2,6-bis[(boranato(tert-butyl)methylphosphino)methyl]pyridine. It was used in the asymmetric intramolecular hydroamination of amino-1,3-dienes, with the desired products being obtained in good yields and with excellent regioselectivities and up to moderate enantioselectivities. The absolute configuration of one of the hydroamination products was determined by X-ray crystallography studies. This simple and efficient procedure can be used for the synthesis of allyl-type chiral pyrrolidine derivatives.

Graphical abstract: P-stereogenic PNP pincer-Pd catalyzed intramolecular hydroamination of amino-1,3-dienes
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