Asymmetric Synthesis of α-Chloro-β-amino-<i>N</i>-sulfinyl Imidates as Chiral Building Blocks
作者:Filip Colpaert、Sven Mangelinckx、Stijn De Brabandere、Norbert De Kimpe
DOI:10.1021/jo200082w
日期:2011.4.1
New chiral α-chloro-β-amino-N-sulfinyl imidates were synthesized in high yield and excellent diastereomeric excess via highly anti-selective Mannich-type reactions of (RS)-methyl N-tert-butanesulfinyl-2-chloroethanimidate with aromatic aldimines. The α-chloro-β-amino-N-sulfinylimidates proved to be excellent building blocks for the asymmetric synthesis of β-amino-α-chloro amides and esters, aziridine-2-carboxylic
新的手性α氯-β氨基ñ -亚磺酰基亚氨酸酯以高收率和优异的对映体过量通过高度合成抗(的-选择性曼尼希型反应ř小号) -甲基ñ -叔-butanesulfinyl -2- chloroethanimidate与芳族醛亚胺。事实证明,α-氯代-β-氨基-N-亚磺酰基亚氨酸酯是β-氨基-α-氯代酰胺和酯,氮丙啶-2-羧酸酰胺和酯,反式-2-芳基-3的不对称合成的极好的构建基。 -氯氮杂环丁烷和4-苯基恶唑烷丁-2-酮-5-羧酸甲酯。获得的绝对抗-非对映选择性是与α-甲基取代的亚胺所观察到的立体化学结果相反的。