Rhodium‐Catalyzed Asymmetric Transfer Hydrogenation of Heterocyclic Diaryl Ketones: Facile Access to Key Intermediate of Baloxavir<sup>†</sup>
作者:Li Wang、Renwei Xiao、Jingyuan Song、Long‐Sheng Zheng、Qiwei Lang、Gen‐Qiang Chen、Xumu Zhang
DOI:10.1002/cjoc.202300487
日期:2024.1
a highly efficient and enantioselective transfer hydrogenation of dibenzoheptaheterocyclic ketones catalyzed by an arene-tethered TsDPEN-based Rh(III) catalyst has been successfully developed, and a variety of dibenzoheptaheterocyclic ketones were reduced by a 1/1 mixture of formic acid and DBU (1,8-diazabicyclo[5.4.0]undec-7-ene) with high yields and enantioselectivities. With this method, the asymmetric
过渡金属催化的不对称转移氢化已被证明是合成手性醇的有效方法。在此,成功开发了芳烃系链TsDPEN基Rh(III)催化剂催化的二苯并七杂环酮的高效对映选择性转移氢化,并通过甲酸和DBU的1/1混合物还原多种二苯并七杂环酮(1,8-二氮杂双环[5.4.0]十一碳-7-烯)具有高产率和对映选择性。该方法实现了7,8-二氟二苯并[ b , e ]thiepin-11(6H ) -one的不对称还原,提供了巴洛沙韦关键中间体巴洛沙韦酯的关键中间体,收率>99%,ee值>99%。底物/催化剂摩尔比为1000。