Highly Diastereoselective and Enantioselective Preparation of Homoallylic Amines: Application for the Synthesis of β-Amino Acids and γ-Lactams
作者:P. Veeraraghavan Ramachandran、Thomas E. Burghardt
DOI:10.1002/chem.200401295
日期:2005.7.18
furnished homoallylic amines in good yields and high ee. A 11B NMR spectroscopy study revealed that the reactions do not proceed, even at room temperature, unless a molar equivalent of water or methanol is added. The first reagent-controlled asymmetric crotylboration and alkoxyallylboration of aldimines furnishing beta-methyl or beta-alkoxy homoallylic amines in very high diastereoselectivity and enantioselectivity
Catalytic Manufacturing Method for Imine Having No Substituent Group on the Nitrogen, and Use for the Imine Produced
申请人:POSTECH ACADEMY-INDUSTRY FOUNDATION
公开号:US20150344428A1
公开(公告)日:2015-12-03
The present invention relates to a method for manufacturing an imine having no substituent group on the nitrogen by using, as a catalyst, a metal complex on an organic azide compound, and more specifically relates to a method in which a metal-complex catalyst is used to produce, from an organic azide having an alpha-hydrogen, an imine having no substituent group on the nitrogen via a continuous nitrogen removal and 1,2-hydrogen transfer reaction. The imine having no substituent group on the nitrogen manufactured by means of the method of the present invention can synthesise diverse coupling products comprising amine compounds by means of reactions with diverse nucleophiles.
Asymmetric Petasis Borono‐Mannich Allylation Reactions Catalyzed by Chiral Biphenols
作者:Yao Jiang、Scott E. Schaus
DOI:10.1002/anie.201611332
日期:2017.2
Chiral biphenols catalyze the asymmetric Petasis borono‐Mannich allylation of aldehydes and amines through the use of a bench‐stable allyldioxaborolane. The reaction proceeds via a two‐step, one‐pot process and requires 2–8 mole % of 3,3′‐Ph2‐BINOL as the optimal catalyst. Under microwave heating the reaction affords chiral homoallylic amines in excellent yields (up to 99 %) and high enantioselectivies
Chiral Synthesis of Functionalized Tetrahydropyridines: γ-Aminobutyric Acid Uptake Inhibitor Analogues
作者:P. Veeraraghavan Ramachandran、Thomas E. Burghardt、Layla Bland-Berry
DOI:10.1021/jo0508200
日期:2005.9.1
N-aluminoimines, furnished functionalized aminodienes, which underwent ring-closing metathesis to provide chiral C5−C6 disubstituted tetrahydropyridine-3-carboxylates. This methodology has been applied for the synthesis of a chiral C6-substituted tetrahydropyridine with known GABA-inhibiting properties at low concentrations.