Mohapatra S, Bandyopadhyay A, Barma DK, Capdevila JH, Falck JR. Chiral alpha,beta-dialkoxy- and alpha-alkoxy-beta-aminostannanes: preparation and copper-mediated cross-coupling.
Org Lett 2004;
5:4759-62. [PMID:
14653667 DOI:
10.1021/ol035458v]
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Abstract
Addition of Zn(n-Bu(3)Sn)(2) to prochiral aldehydes affords anti-alpha,beta-dialkoxy- and anti-alpha-alkoxy-beta-aminostannanes in good yield (up to 77%) and excellent diastereoselectivity (up to 98% de). syn-Isomers are accessed from the initial adducts via Mitsunobu inversion/saponification. The corresponding thionocarbamates undergo mild Cu(I)-mediated cross-coupling with a variety of organic halides, inter alia, allylic, cinnamylic, propargylic, and acetylenic, with retention of configuration. [reaction: see text]
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