A Catalytic Tethering Strategy: Simple Aldehydes Catalyze Intermolecular Alkene Hydroaminations
作者:Melissa J. MacDonald、Derek J. Schipper、Peter J. Ng、Joseph Moran、André M. Beauchemin
DOI:10.1021/ja208867g
日期:2011.12.21
Herein we describe a catalytic tethering strategy in which simplealdehyde precatalysts enable, through temporary intramolecularity, room-temperature intermolecular hydroamination reactivity and the synthesis of vicinal diamines. The catalyst allows the formation of a mixed aminal from an allylic amine and a hydroxylamine, resulting in a facile intramolecular hydroamination event. The promising enantioselectivities
Regioselective reductive transamination of peptidic amides enabled by a dual Zr(IV)–H catalysis
作者:Jian-Tao Tang、Yu Gan、Xuejiao Li、Baihua Ye
DOI:10.1016/j.chempr.2022.11.002
日期:2022.12
is a common structural motif of peptides and biologically active molecules, is a highly attractive target for catalytic transformations. Despite its high synthetic potential, the chemical inertness of the amide bond, owing to its resonance stabilization, has rendered this approach challenging. Existing catalytic modes essentially include metal-catalyzed carbon–nitrogen bond activation, transamidation
Highly Enantioselective Intermolecular Hydroamination of Allylic Amines with Chiral Aldehydes as Tethering Catalysts
作者:Melissa J. MacDonald、Colin R. Hesp、Derek J. Schipper、Marc Pesant、André M. Beauchemin
DOI:10.1002/chem.201203462
日期:2013.2.18
Chirally LinkedIn: Chiralaldehydes are effective tetheringcatalysts for enantioselectiveintermolecularhydroamination, which provides access to vicinal diamine motifs in good yields and excellent enantioselectivities (see scheme). This work highlights simple chiral α‐oxygenated aldehydes as effective organocatalysts capable of efficiently inducing asymmetry through transient intramolecularity.