The First Synthesis of Enantiopure α-Amino Ketimines and Amino Aziridines
摘要:
Chiral l-aminoalkyl chloromethyl ketimines 2 are synthesized in enantiomerically pure form starting from l-aminoalkyl chloromethyl ketones 1 and different amines. Reduction of amino ketimines 2 and subsequent spontaneus cyclization affords aminoalkyl aziridines 3 with high diastereoisomeric excess and without detectable racemization.
Ring Opening of Nonactivated 2-(1-Aminoalkyl) Aziridines: Unusual Regio- and Stereoselective C-2 and C-3 Cleavage
作者:José M. Concellón、Estela Riego
DOI:10.1021/jo034440v
日期:2003.8.1
We have studied the ring opening of nonactivated amino aziridines 1 by water under acidic conditions. Depending on the acid used, amino aziridines are cleaved at C-3 or C-2 with high regioselectivity, and total stereoselectivity, affording chiral 2,3-diaminoalkan-1-ols 3 or 1,3-diaminoalkan-2-ols 4 in high yield.
Regio- and Stereoselective C-2 and C-3 Cleavage of 2-(1-Aminoalkyl)aziridines with Alcohols, Carboxylic Acids, and Sodium Iodide
作者:José M. Concellón、Estela Riego、José Ramón Suárez
DOI:10.1021/jo0350514
日期:2003.11.1
aziridines 1 using several nucleophiles, such as alcohols, carboxylic acids, and sodium iodide, is described. Depending on the nucleophile used, aziridines 1 are cleaved at C-3 or C-2 with total regio- and stereoselectivity, affording chiral 2-alkoxy-1,3-diamines 2 with alcohols, or O-acylated-1-hydroxy-2,3-diamines 6 with carboxylic acids in moderate or high yield. In the case of the aziridines derived