Oxidation of acyclic monoterpenes by P450 BM-3 monooxygenase: influence of the substrate E/Z-isomerism on enzyme chemo- and regioselectivity
作者:Yomi Watanabe、Sabine Laschat、Michael Budde、Olena Affolter、Yuji Shimada、Vlada B. Urlacher
DOI:10.1016/j.tet.2007.06.104
日期:2007.9
terpenoids are highly valuable compounds for organic chemistry. Cytochrome P450 monooxygenase P450 BM-3 from Bacillus megaterium is able to catalyzeoxidation of terpenes with high efficiency. Mutations at the amino acid positions 47, 51, and 87 resulted in significantly enhanced activity and regioselectivity of the enzyme during oxidation of geranylacetone and related compounds. The activity of the mutant
Process for the preparation of ketones by ozonolysis
申请人:Nobis Markus
公开号:US20060224019A1
公开(公告)日:2006-10-05
The invention relates to a process for the preparation of a ketone from a tertiary alcohol having a double bond in the alpha position, that includes the step of contacting tertiary alcohol having a double bond in the alpha position with ozone in the presence of an inorganic base under ketone-forming reaction conditions.
Verfahren zur Darstellung von Ketonen durch Ozonolyse
申请人:Symrise GmbH & Co. KG
公开号:EP1710224B1
公开(公告)日:2007-12-19
US7335796B2
申请人:——
公开号:US7335796B2
公开(公告)日:2008-02-26
Hot Water-Promoted Ring-Opening of Epoxides and Aziridines by Water and Other Nucleopliles
作者:Zhi Wang、Yong-Tao Cui、Zhao-Bing Xu、Jin Qu
DOI:10.1021/jo702401t
日期:2008.3.1
Effective hydrolysis of epoxides and aziridines was conducted by heating them in water at 60 or 100 degrees C. Other types of nucleophile such as amines, sodium azide, and thiophenol could also efficiently open epoxides and aziridines in hot water. It was proposed that hot water acted as a modest acid catalyst, reactant, and solvent in the hydrolysis reactions.