The carboxyl group (COOH) is an omnipresent functional group in organic molecules, and its direct catalytic activation represents an attractive synthetic method. Herein, we describe the first example of a direct catalytic nucleophilic activation of carboxylicacids with BH3·SMe2, after which the acids are able to act as carbon nucleophiles, i.e. enolates, in Mannich-type reactions. This reaction proceeds
Rhodium-catalyzed approach to mannich-type products using aldimine, α,β-unsaturated ester, and hydrosilaneElectronic supplementary information (ESI) available: experimental details. See http://www.rsc.org/suppdata/cc/b2/b202773a/
A rhodium-catalyzed method for the synthesis of β-amino esters was accomplished in a one-pot procedure from aldimine, α,β-unsaturated ester and hydrosilane.
利用铑催化的方法,通过一锅法从醛亚胺、α,β-不饱和酯和氢硅烷合成了β-氨基酯。
Asymmetric Synthesis of New Chiral β-Amino Acid Derivatives by Mannich-type Reactions of Chiral <i>N</i>-Sulfinyl Imidates with <i>N</i>-Tosyl Aldimines
作者:Filip Colpaert、Sven Mangelinckx、Norbert De Kimpe
DOI:10.1021/ol100073y
日期:2010.5.7
New chiral β-(sulfonylamino)sulfinylimidates are synthesized in high overall yield and excellent diastereomeric excess via highly anti-selective Mannich-type reactions of chiral N-tert-butanesulfinyl imidates with N-tosyl aldimines. Deprotection of the β-(sulfonylamino)sulfinylimidates gave access to enantiopure imidate hydrochlorides in high yields, as useful intermediates for an easy transformation