作者:Carlo Cassani、Luca Bernardi、Francesco Fini、Alfredo Ricci
DOI:10.1002/anie.200900701
日期:2009.7.20
synthetic equivalents of a variety of α‐carboxylate anions. Phase‐transfer catalysis (PTC) enabled their mild deprotonation and catalytic asymmetric addition to highly reactive imines generated in situ from α‐amidosulfones (see scheme; Pg=protecting group). The synthetic utility of the products was demonstrated by their straightforward transformation into a range of β‐amino acid derivatives.
砜与砜:芳基磺酰乙酸盐可以看成是各种α-羧酸根阴离子的合成等价物。相转移催化(PTC)使它们能够轻度去质子化,并催化不对称添加到α-酰胺基砜现场生成的高反应性亚胺上(见方案; Pg =保护基)。通过将其直接转化为一系列β-氨基酸衍生物,证明了该产品的合成效用。