Asymmetric Transfer Hydrogenation of
<i>gem</i>
‐Difluorocyclopropenyl Esters: Access to Enantioenriched
<i>gem</i>
‐Difluorocyclopropanes
作者:Khalil Yamani、Hugo Pierre、Alexis Archambeau、Christophe Meyer、Janine Cossy
DOI:10.1002/anie.202008572
日期:2020.10.12
Catalytic enantioselective access to disubstituted functionalized gem‐difluorocyclopropanes, which are emerging fluorinated motifs of interest in medicinal chemistry, was achieved through asymmetric transfer hydrogenation of gem‐difluorocyclopropenyl esters, catalyzed by a Noyori–Ikariya (p‐cymene)‐ruthenium(II) complex, with (N‐tosyl‐1,2‐diphenylethylenediamine) as the chiral ligand and isopropanol
到二取代的官能化催化对映选择性访问宝石-difluorocyclopropanes,这些新兴的在药物化学兴趣氟化基序,通过的不对称转移氢化来实现宝石-difluorocyclopropenyl酯,由野依-Ikariya(催化p -cymene) -钌(II)络合物,其中(N-甲苯磺酰基-1,2-二苯基乙二胺)为手性配体,异丙醇为氢供体。得到的顺式-二氟环丙酸酯具有中等到高的对映选择性(ee = 66–99%),并且后官能化反应使人们能够获得包含顺式或反式的有价值的结构单元。-宝石-二氟环丙基基序。