Pyridinium 1,1′-Binaphthyl-2,2′-disulfonates as Highly Effective Chiral Brønsted Acid−Base Combined Salt Catalysts for Enantioselective Mannich-Type Reaction
作者:Manabu Hatano、Toshikatsu Maki、Katsuhiko Moriyama、Manabu Arinobe、Kazuaki Ishihara
DOI:10.1021/ja806875c
日期:2008.12.17
established, for the first time, a practical synthesis of chiral 1,1'-binaphthyl-2,2'-disulfonic acid (BINSA 1) from inexpensive BINOL. An efficient enantioselective catalysis in the Mannich-type reactions of diketones and ketoester equivalents with aldimines was developed using chiral 1-achiral 2,6-diarylpyridine (2) combined salts, which acted as convenient chiral tailor-made Brønsted acid-base organocatalysts
我们首次从廉价的 BINOL 建立了手性 1,1'-联萘-2,2'-二磺酸 (BINSA 1) 的实用合成方法。使用手性 1-非手性 2,6-二芳基吡啶 (2) 化合盐开发了二酮和酮酯等价物与醛亚胺的曼尼希型反应中的高效对映选择性催化,其作为方便的手性定制 Brønsted 酸碱原位有机催化剂.