Synthesis and analysis of stable isotope-labelled N-acyl homoserine lactones
作者:Ewout Ruysbergh、Christian V. Stevens、Norbert De Kimpe、Sven Mangelinckx
DOI:10.1039/c6ra17797b
日期:——
stable isotope-labelled AHLs as a labelled standard for analysis via isotope dilution mass spectrometry, these compounds can be used to study the metabolic fate of the fatty acid tail of the AHL-molecule. These isotope-labelled compounds were fully characterized and used to synthesize the deuterated analogues of two commonly occurring AHL-degradation products, a tetramic acid and a ring opened N-acyl homoserine
Chemoenzymatic β-specific methylene C(sp<sup>3</sup>)–H deuteration of carboxylic acids
作者:Xicheng Wang、Zhaohui Sun、Tao Li、Saima Perveen、Pengfei Li
DOI:10.1039/d4gc00082j
日期:——
including borate, palladium, and lipase, enabled a one-pot β-specific methylene C(sp3)–H deuteration reaction of aliphatic acids using D2O. In the context of the widely used 8-aminoquinoline (8-AQ) directed C–H activation, this represented the first example of catalytic formation and cleavage of the directinggroup under mild conditions. Compared with previous deuteration methods, high chemo- and regioselectivity
Transformation of Zirconocene−Olefin Complexes into Zirconocene Allyl Hydride and Their Use as Dual Nucleophilic Reagents: Reactions with Acid Chloride and 1,4-Diketone
Zirconocene-olefin complexes Cp2Zr(H2C=CHR), prepared in benzene-THF at 0 degreesC, react with acid chlorides to provide homoallylic alcohols. The key is an equilibrium between the zirconocene-olefin complexes and the corresponding zirconocene allyl hydride complexes via allylic C-H bond cleavage of the coordinating alkenes. Furthermore, the zirconocene-olefin complexes are also available for the reaction with 1,4-diketone to afford anti-1,4-diols with excellent diastereoselectivity. Thus, Cp2Zr(H2C CHR) serves as a donor of both hydride and an allylic group. These reactions also proceed efficiently by using zirconocene-olefin complexes, derived from Cp2ZrCl2, Mg metal, and 1-alkenes.
A thorough study of the stereochemical consequences of the hydration/dehydration reaction catalyzed by .beta.-hydroxydecanoyl thioester dehydrase
作者:John M. Schwab、Asif. Habib、John B. Klassen
DOI:10.1021/ja00277a040
日期:1986.8
BODEN, N.;BUSHBY, R. J.;CLARK, L. D., J. CHEM. SOC. PERKIN TRANS., 1983, N 3, 543-551