Scalable and sustainable electrochemical allylic C–H oxidation
作者:Evan J. Horn、Brandon R. Rosen、Yong Chen、Jiaze Tang、Ke Chen、Martin D. Eastgate、Phil S. Baran
DOI:10.1038/nature17431
日期:2016.5.5
transformation, the majority of conditions still use highly toxic reagents (based around toxic elements such as chromium or selenium) or expensive catalysts (such as palladium or rhodium). These requirements are problematic in industrial settings; currently, no scalable and sustainable solution to allylicoxidation exists. This oxidation strategy is therefore rarely used for large-scale synthetic applications
Improving the Monooxygenase Activity and the Regio- and Stereoselectivity of Terpenoid Hydroxylation Using Ester Directing Groups
作者:Emma A. Hall、Md. Raihan Sarkar、Joel H. Z. Lee、Samuel D. Munday、Stephen G. Bell
DOI:10.1021/acscatal.6b01882
日期:2016.9.2
enzyme CYP101B1, fromNovosphingobiumaromaticivoransDSM12444, binds norisoprenoids more tightly than monoterpenoids and oxidized these substrates with high regioselectivity. Ionols bound less tightly to CYP101B1 than ionones, but the levels of product formation remained high and the selectivity of oxidation was similar to that observed for the parent norisoprenoid. The structurally related sesquiterpene
Synthesis of new compounds that combine the diazaadamantane and monoterpenoid moieties was carried out based on the reaction between dimethylbispidinone and monoterpene-derived aldehydes. Investigation of the analgesic activity of the obtained products revealed that compound 5a synthesized from (-)-myrtenal had a higher efficacy compared with the reference drug, diclofenac sodium, in the acetic acid-induced writhing and hot plate tests. Compound 5a exhibits a low acute toxicity and does not cause damage to the gastric mucosa, and its analgesic effect is, at least partially, mediated by the cannabinoid system involving CB1 receptors.