Diastereo- and enantioselective additions of α-nitro esters to imines for <i>anti</i>-α,β-diamino acid synthesis with α-alkyl-substitution
作者:Daniel J. Sprague、Anand Singh、Jeffrey N. Johnston
DOI:10.1039/c7sc05176j
日期:——
The discovery that a C2-symmetric bis(AMidine) [BAM] catalyst promotes an anti-selectiveaddition of α-substituted α-nitro esters to imines is described, providing α-substituted α,β-diamino ester products with high diastereo- and enantioselectivity. When compared to the function of a BAM catalyst reported previously, the pair offer a rare example of diastereodivergence using a bifunctional Brønsted