Enzymatic halocyclization of allenic alcohols and carboxylates: a biocatalytic entry to functionalized O-heterocycles
作者:J. Naapuri、J. D. Rolfes、J. Keil、C. Manzuna Sapu、J. Deska
DOI:10.1039/c6gc01926a
日期:——
Chloroperoxidase fromCaldariomycesfumago catalyzes the aerobic oxidative halocyclization of allenic alcohols and carboxylates yielding functionalized furan and pyran heterocycles as valuable synthetic scaffolds. Thanks to an oxidase-initiated redox cascade,...
Enzymatic Bromocyclization of α‐ and γ‐Allenols by Chloroperoxidase from
<i>Curvularia inaequalis</i>
作者:Janne M. Naapuri、Philip K. Wagner、Frank Hollmann、Jan Deska
DOI:10.1002/open.202100236
日期:2022.1
Vanadate-dependent chloroperoxidasefromCurvulariainaequalis catalyzes 5-endo-trig bromocyclizations of α-allenols as well as the 5-exo-trig bromocyclizations of γ-allenols to produce valuable halofunctionalized furans. An aqueous biphasic emulsion, based on either cationic or non-ionic surfactants, acts as reaction medium, and allows effective halogenation reactions utilizing hydrogen peroxide as
Arene CH Bond Functionalization Coupling with Cyclization of Allenes
作者:Rong Zeng、Juntao Ye、Chunling Fu、Shengming Ma
DOI:10.1002/adsc.201300408
日期:2013.7.8
Under the catalysis of a rhodium(III) complex, the cyclization of 2,3‐allenols was most probably initiated with the CHbondfunctionalization of N‐methoxybenzamides using the tetramethylcyclopentadiene anion (C5Me4−) as ligand, affording differently substituted 2,5‐dihydrofuran derivatives. Highly efficient axial‐to‐central chirality transfer has been observed.