<i>N</i>-Benzoyl-<scp>L</scp>-Threonine-Isopropyl-Ester-Mediated Crystallization-Induced Dynamic Resolution of α-Bromo Arylacetates for the Asymmetric Synthesis of α-Thio and α-Oxy Arylacetates
作者:Kon Ji Park、Yelim Kim、Myung-su Lee、Yong Sun Park
DOI:10.1002/ejoc.201301539
日期:2014.3
N-Benzoyl-L-threonine-isopropyl-ester-mediated crystallization-induced dynamic resolution (CIDR) of configurationally labile α-bromo arylacetates has been investigated. The CIDR was successfully used for the asymmetric preparation of these compounds with up to 98:2 dr, under solution and solvent-free conditions. Subsequent nucleophilic substitution reactions with sulfur and oxygen nulceophiles gave
已经研究了 N-苯甲酰基-L-苏氨酸-异丙基酯介导的结晶诱导动态拆分 (CIDR) 的构型不稳定 α-溴芳基乙酸酯。在溶液和无溶剂条件下,CIDR 成功地用于这些化合物的不对称制备,比例高达 98:2 dr。随后与硫和氧亲核试剂的亲核取代反应得到了高达 98:2 dr 的 α-硫代和 α-氧基芳基乙酸酯。该方法进一步开发用于制备高对映体富集的 2-苯硫基-2-芳基乙醇(最高 97:3 er)和 1,4-苯并恶嗪-3-酮(最高 94:6 er)。