Phenol-Directed Enantioselective Allylation of Aldimines and Ketimines
摘要:
Phenols are effective directing and activating groups for our allylchlorosilane reagents, allowing the highly enantioselective allylation of a range of 2-aminophenol-derived aldimines. When the phenol is incorporated into the substrate ketimines may be allylated highly enantioselectively, leading to the experimentally simple synthesis of a range of tertiary carbinamine structures.
Toward a Versatile Allylation Reagent: Practical, Enantioselective Allylation of Acylhydrazones Using Strained Silacycles
作者:Richard Berger、Philippe M. A. Rabbat、James L. Leighton
DOI:10.1021/ja035001g
日期:2003.8.1
A highly practical method for the enantioselectiveallylation of acylhydrazones has been developed. The previously reported strained silacycle reagent 1 reacts with a wide variety of acylhydrazones to give the hydrazide products with good enantioselectivity (83-89% ee, typically). It has been demonstrated that the products may be isolated without chromatography by recrystallization in >/=98% ee.
Phenol-Directed Enantioselective Allylation of Aldimines and Ketimines
作者:Philippe M. A. Rabbat、S. Corey Valdez、James L. Leighton
DOI:10.1021/ol062589y
日期:2006.12.1
Phenols are effective directing and activating groups for our allylchlorosilane reagents, allowing the highly enantioselective allylation of a range of 2-aminophenol-derived aldimines. When the phenol is incorporated into the substrate ketimines may be allylated highly enantioselectively, leading to the experimentally simple synthesis of a range of tertiary carbinamine structures.