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. 2008 Oct 2;10(19):4375-8.
doi: 10.1021/ol8018456. Epub 2008 Aug 30.

Synthesis of high enantiopurity N-protected alpha-amino ketones by thiol ester-organostannane cross-coupling using pH-neutral conditions

Hao Li  1 , Hao Yang, Lanny S Liebeskind
Affiliations

Synthesis of high enantiopurity N-protected alpha-amino ketones by thiol ester-organostannane cross-coupling using pH-neutral conditions

Hao Li et al. Org Lett. .

Abstract

An efficient synthesis of high enantiopurity N-protected alpha-amino ketones is described. Complementing other studies using boronic acids and thiol esters, this Cu(I) diphenylphosphinate (CuDPP)-mediated, palladium-catalyzed coupling of alpha-amino thiol esters with aryl, heteroaryl, allyl, and alkenyl organostannanes gives N-protected alpha-amino ketones in high yields with high enantiopurity (in almost all cases) under mild and pH-neutral reaction conditions. The viability of pi-deficient heteroarylstannanes is an advantage of this reaction compared to the related boronic acid system.

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Figures

Figure 1
Figure 1
Structural Features Influencing Racemization
See this image and copyright information in PMC

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