Enantioselective Synthesis of δ-Lactones with Lipase-Catalyzed Resolution and Mitsunobu Reaction
摘要:
Both enantiomers of a series of delta-lactones (e.g., delta-decalactone, delta-dodelactone, and delta-hexadecalactone) were synthesized stereoselectively by Novozym 435-catalyzed resolution. Furthermore, only (S)-enantiomers of delta-lactones were synthesized with a combination of Novozym 435-catalyzed resolution and Mitsunobu reaction.
Cascade Biotransformations via Enantioselective Reduction, Oxidation, and Hydrolysis: Preparation of (<i>R</i>)-δ-Lactones from 2-Alkylidenecyclopentanones
作者:Ji Liu、Zhi Li
DOI:10.1021/cs400101v
日期:2013.5.3
cascade biotransformation involving enantioselective reduction of a C═C double bond, Baeyer–Villiger oxidation, and lactone hydrolysis was developed as a green and sustainable tool for synthesizing enantiopure δ-lactones. One-pot cascade biotransformations were achieved with Acinetobacter sp. RS1 containing a novel enantioselective reductase and an enantioselective lactone hydrolase and Escherichia coli
Enoyl acyl carrier protein reductase (FabI) catalyzed asymmetric reduction of the CC double bond of α,β-unsaturated ketones: preparation of (R)-2-alkyl-cyclopentanones
作者:Ji Liu、Jinchuan Wu、Zhi Li
DOI:10.1039/c4cc04150j
日期:——
Enoyl-ACP reductase (FabI) was identified as a non-OYE 'ene'-reductase for asymmetric reduction of the C=C double bond of alpha, beta-unsaturated ketones. Reduction of several 2-alkylidenecyclopentanones with A-FabI and E-FabI gave (R)-2-alkylcyclopentanones in 95-90% and 70-81% ee, respectively. The product ee was improved to 99-98% in high yield by subsequent one-pot biooxidation.
A method for the chromatographic resolution of tetrahydropyran-2-ones
作者:Philip Ashworth、Shiddappa L. Belagali、Sharon Casson、Anna Marczak、Philip Kocieński
DOI:10.1016/s0040-4020(01)80729-8
日期:1991.12
The spirocyclic ortholactones prepared from certain tetrahydropyran-2-ones (valerolactones) and (1R)-1-phenylpropan-1,3-diol are readily separable by flash chromatography on silica gel. Hydrolysis of the resolved ortholactones then provides the pure homochiral lactones.
Pd-Catalyzed kinetic resolution of cyclic enol ethers. An enantioselective route to functionalised pyrans
作者:Jean-Olivier Zirimwabagabo、Joseph P. A. Harrity
DOI:10.1039/c4cc00109e
日期:——
Functionalised cyclic enol ethers can be recovered with high levels of enantiocontrol after an asymmetric catalytic [1,3]-rearrangement reaction.
通过不对称催化[1,3]-重排反应,可以高度控制环状烯醚的手性,并使其得到回收。
Sustainable approach for highly-enantioselective synthesis of lactones by a Baeyer-Villiger monooxygenase from Fusarium
作者:Lan Huong Le Viet、Mayumi Tamura、Tomoko Matsuda
DOI:10.1016/j.tet.2024.133875
日期:2024.3
Baeyer-Villigermonooxygenases (BVMOs), flavin-dependent enzymes that use atmospheric oxygen to catalyze oxidation reactions, are valuable for various applications. In this study, we employed a novel BVMO from the fungus, sp. NBRC 109816, (BVMO) to synthesize diverse chiral lactones. The enzyme demonstrated a broad substrate compatibility with a variety of cyclic ketones. In addition, the preparative-scale