Chemoenzymatic Synthesis of Substituted Azepanes by Sequential Biocatalytic Reduction and Organolithium-Mediated Rearrangement
作者:Wojciech Zawodny、Sarah L. Montgomery、James R. Marshall、James D. Finnigan、Nicholas J. Turner、Jonathan Clayden
DOI:10.1021/jacs.8b11891
日期:2018.12.26
Enantioenriched 2-aryl azepanes and 2-arylbenzazepines were generated biocatalytically by asymmetric reductive amination using imine reductases or by deracemization using monoamine oxidases. The amines were converted to the corresponding N'-aryl ureas, which rearranged on treatment with base with stereospecific transfer of the aryl substituent to the 2-position of the heterocycle via a configurationally
Enantioenriched 2-aryl azepanes 和 2-arylbenzazepines 是通过使用亚胺还原酶的不对称还原胺化或通过使用单胺氧化酶的 deracemization 生物催化生成的。胺被转化为相应的 N'-芳基脲,在用碱处理时重排,芳基取代基通过构型稳定的苄基锂中间体立体有择地转移到杂环的 2-位。这些产品是以前无法获得的富含对映体的 2,2-二取代氮杂环庚烷和苯并氮杂。