| Hauptseite > Publikationsdatenbank > Tyrosinases in Organic Chemistry: A Versatile Tool for the α-Arylation of β-Dicarbonyl Compounds |
| Journal Article | FZJ-2019-00483 |
; ; ; ; ; ; ;
2018
Wiley-VCH Verl.
Weinheim
This record in other databases:
Please use a persistent id in citations: doi:10.1002/ejoc.201800188
Abstract: A tyrosinase‐mediated arylation towards a variety of different building blocks is presented. Utilizing phenol or simple substituted phenols, the corresponding quinones are synthesized in a two‐step procedure by an enzyme‐catalyzed oxidation (tyrosinase from Aspergillus oryzae). The activated intermediates undergo a 1,4‐addition with selected β‐dicarbonyl compounds. Starting from phenol, yields of isolated product for the hydroxylation‐oxidation‐arylation sequence range from 43–77 %, whereas substituted acceptors provided 9–55 %, only. Different substitution patterns on phenol revealed that electron donating functionalities are preferentially accepted to electron withdrawing ones, whereas ortho‐substituted phenols are not accepted at all.
|
The record appears in these collections: |