Synthesis of Optically Pure 2-Azido-1-arylethanols with Isolated Enzymes and Conversion to Triazole-Containing β-Blocker Analogues Employing Click Chemistry
作者:Haribabu Ankati、Yan Yang、Dunming Zhu、Edward R. Biehl、Ling Hua
DOI:10.1021/jo8009616
日期:2008.8.1
α-azidoacetophenone derivatives catalyzed by a recombinant carbonyl reductase from Candida magnoliae (CMCR) or an alcohol dehydrogenase from Saccharomyces cerevisiae (Ymr226c). This provides an effective route to this class of important compounds in optically pure form. (S)-2-Azido-1-(p-chlorophenyl)ethanols reacted with alkynes employing click chemistry to afford high yields of optically pure triazole-containing
Efficient Enantioselective Reduction of Ketones with <i>Daucus carota</i> Root
作者:J. S. Yadav、S. Nanda、P. Thirupathi Reddy、A. Bhaskar Rao
DOI:10.1021/jo010399p
日期:2002.5.1
active alcohols are the potential chiral building blocks for the synthesis of pharmaceutically important molecules and asymmetricchiral ligands. Hence, this biocatalytic approach is found to be the most suitable for the preparation of a wide range of chiralalcohols and gave inspiration for the development of a new biotechnological process.
Asymmetric azidohydroxylation of styrene derivatives mediated by a biomimetic styrene monooxygenase enzymatic cascade
作者:Lía Martínez-Montero、Dirk Tischler、Philipp Süss、Anett Schallmey、Maurice C. R. Franssen、Frank Hollmann、Caroline E. Paul
DOI:10.1039/d1cy00855b
日期:——
established a cascade for the asymmetric azidohydroxylation of styrene derivatives leading to chiral substituted 1,2-azido alcohols via enzymatic asymmetric epoxidation, followed by regioselective azidolysis, affording the azido alcohols with up to two contiguous stereogenic centers. A newly isolated two-component flavoprotein styrene monooxygenase StyA proved to be highly selective for epoxidation
Microwave-assisted benzyne-click chemistry: preparation of 1H-benzo[d][1,2,3]triazoles
作者:Haribabu Ankati、Ed Biehl
DOI:10.1016/j.tetlet.2009.06.004
日期:2009.8
[3+2] cycloadditions of various azides to benzyne, 3-methoxybenzyne, and 4,5-difluorobenzyne. In the three-component reaction, the aryne is generated, in the presence of an azide prepared in situ, by the reaction of an o-(trimethylsilylaryl) triflate with either CsF or KF/18-Crown-6. However, in the two-component reactions, a freshly prepared azide is added to the reaction vessel prior to aryne generation
Ten different fluorinated aromatic epoxides have been tested as potential substrates for halohydrin dehalogenase (HHDH) HheC. The majority of investigated epoxides are useful building blocks in synthetic chemistry applications, with a number of them being polysubstituted. Moderate to high enantioselectivities (ER = 15 → 200) were observed in azidolysis, allowing the synthesis of enantioenriched (R)-azido