In the presence of a catalytic amount of samariumdiiodide in methylene chloride, aromatic imines react with Danishefsky diene to form tetrahydropyridine-4-ones in high yields. Under the same conditions, various imino-aldol reactions afford β-amino esters or β-amino ketones.
<i>trans</i>-Symmetric Dynamic Covalent Systems: Connected Transamination and Transimination Reactions
作者:Fredrik Schaufelberger、Lei Hu、Olof Ramström
DOI:10.1002/chem.201500520
日期:2015.6.26
transaminations as a new type of dynamiccovalent reaction is described. The key 1,3‐proton shift is under complete catalytic control and can be conducted orthogonally to, or simultaneous with, transimination in the presence of an amine to rapidly yield two‐dimensional dynamicsystems with a high degree of complexity evolution. The transamination–transimination systems are proven to be fully reversible
Scandium triflate catalyzed cycloaddition of imines with 1,1-cyclopropanediesters: efficient and diastereoselective synthesis of multisubstituted pyrrolidines
作者:Yan-Biao Kang、Yong Tang、Xiu-Li Sun
DOI:10.1039/b512195g
日期:——
A tandem ring-opening–cyclization reaction of cyclopropanes with imines in the presence of 5 mol% of scandium triflate was developed for the highly diastereoselective synthesis of multisubstituted pyrrolidines.
Barbier-type allylation of unactivated aldimines with allyl bromides in the presence of indium powder took place rapidly in alcoholic solvents to give homoallylic amines in fair to good yields.
Phosphatase inhibitors—III. Benzylaminophosphonic acids as potent inhibitors of human prostatic acid phosphatase
作者:Scott A. Beers、Charles F. Schwender、Deborah A. Loughney、Elizabeth Malloy、Keith Demarest、Jerold Jordan
DOI:10.1016/0968-0896(96)00186-1
日期:1996.10
phenylphosphonic acid, and a rigid conformer produced by an internal salt bridge between the phosphonate and the alpha-amino group. Replacement of the phosphonic acid moiety with a phosphinic or carboxylic acid as well as deletion of the benzyl substitution of the alpha-amino group led to great reductions in potency.