Diastereoselective Electrophilic Fluorination of Enantiopure α-Silylketones Using N-Fluoro-benzosulfonimide: Regio- and Enantioselective Synthesis of α-Fluoroketones
作者:Dieter Enders、Sophie Faure、Marcus Potthoff、Jan Runsink
DOI:10.1055/s-2001-18449
日期:——
synthesized in good yields and high enantiomeric excesses (ee = 87– 96%) from the corresponding simple cyclic and acyclic ketone precursors. The procedure involves a regioand diastereoselective electrophilic fluorination of enantiopure -silylketones 2 (de = 37– 98%) using commercially available N-fluorobenzosulfonimide as fluorinating agent, followed by a racemization–free cleavage of the silyl directing
Synthesis 2001, No. 15, 12 11 2001。文章标识符:1437-210X,E;2001,0,15,2307,2319,ftx,en;Z10001SS.pdf。© Georg Thieme Verlag Stuttgart · 纽约 ISSN 0039-7881 摘要: - 氟代酮 6 由相应的简单环状和非环状酮前体以高产率和高对映体过量(ee = 87–96%)合成。该过程包括使用市售的 N-氟苯磺酰亚胺作为氟化剂对对映体纯-甲硅烷基酮 2 (de = 37–98%) 进行区域和非对映选择性亲电氟化,然后以几乎定量的产率对甲硅烷基导向基团进行无消旋化裂解。