Microbiological Transformations 57. Facile and Efficient Resin-Based in Situ SFPR Preparative-Scale Synthesis of an Enantiopure “Unexpected” Lactone Regioisomer via a Baeyer−Villiger Oxidation Process
作者:Iris Hilker、María C. Gutiérrez、Véronique Alphand、Roland Wohlgemuth、Roland Furstoss
DOI:10.1021/ol049508n
日期:2004.6.1
[reaction: see text] The microbiological Baeyer-Villiger oxidation of (-)-bicyclo[3.2.0]hept-2-en-6-one allowed exclusive formation of the "unexpected" lactone regioisomer in 84% yield, high chemical purity, and enantiopure form. Substrate (25 g) was transformed in a 1 L bubble column reactor, following a in situ substrate feeding/product removal methodology, which afforded high volumetric productivity
[反应:参见文本](-)-双环[3.2.0] hept-2-en-6-one的微生物学Baeyer-Villiger氧化使得“意外”内酯区域异构体独家形成,产率为84%,化学纯度高和对映纯形式。按照原位底物进料/产品去除方法,将底物(25 g)在1 L鼓泡塔反应器中进行转化,该方法可提供高体积生产率(1.2 g L(-)(1)h(-)(1))。这说明了这种方法的高度“可持续化学”优点,该方法简单地在水性介质中,在室温和使用大气氧气的条件下进行。
Enzyme-catalysed inter-esterification procedure for the preparation of esters of a chiral secondary alcohol in high enantiomeric purity
作者:Emma L. A. Macfarlane、Stanley M. Roberts、Nicholas J. Turner
DOI:10.1039/c39900000569
日期:——
Chiral esters of high optical purity were obtained by an enzyme-controlled inter-esterification procedure in which the constituent hydrolysis and esterification reactions were suitably matched.
AbstractAn asymmetric synthesis of the diterpenoid 17‐deoxyprovidencin is described. Key steps include an aldol addition, a base‐catalyzed Wipf‐type furan formation, a Z‐selective ring‐closing metathesis for macrocyclization, a photochemical E/Z isomerization to a highly strained and conformationally restricted ring system, and the stereoselective formation of two epoxides on the ring.
Macfarlane, Emma L. A.; Roberts, Stanley M.; Steukers, Veronique G. R., Journal of the Chemical Society. Perkin transactions I, 1993, # 19, p. 2287 - 2290
作者:Macfarlane, Emma L. A.、Roberts, Stanley M.、Steukers, Veronique G. R.、Taylor, Philip L.
DOI:——
日期:——
Newton, Roger F.; Reynolds, Derek P.; Kay, Paul B., Journal of the Chemical Society. Perkin transactions I, 1983, p. 675 - 682
作者:Newton, Roger F.、Reynolds, Derek P.、Kay, Paul B.、Wallace, Timothy W.、Roberts, Stanley M.、et al.