Microbiological synthesis of optically active (2R,3S)-2,3-deuteriocyclohexan-1-ones and (2R,3S)-2-methyl-3-deuteriocyclohexan-1-one. Enantiospecificanti-addition of hydrogen to the double bond of cyclohex-2-en-1-ones.
摘要:
Addition of hydrogen to the double bond of cyclohexenones during microbiological reduction by Beauveria sulfurescens gives the trans product in high yield (90%) resulting from anti-addition to the si face on C-2 and the re face on C-3.
Microbiological synthesis of optically active 3-deuterio-cycloalkanones
作者:Gerard Dauphin、Jean-Claude Gramain、Alain Kergomard、Michel F. Renard、Henri Veschambre
DOI:10.1039/c39800000318
日期:——
Optically active 3-deuterio-cyclopentanone and 3-deuterio-cyclohexanone have been prepared by microbiologicalreduction of 3-deuterio αβ-unsaturated cyclic ketones by Beauveriasulfurescens.
Lewis Acid Promoted Double Bond Isomerization of Tetrahydroxanthones
作者:Anna M. Linsenmeier、Stefan Bräse
DOI:10.1002/ejoc.201201009
日期:2012.11
Herein, a method for the isomerization of the double bonds in tetrahydroxanthones is reported. Tetrahydroxanthones are readily available from salicylaldehydes and cycloalkenones and undergo isomerization upon treatment with AlCl3. The mechanism of the isomerization and follow-up chemistry of the products were investigated. Follow-up chemistry such as asymmetric Corey–Bakshi–Shibata (CBS) reduction
Lewis acid induced conjugate addition of alkenes to .alpha.,.beta.-unsaturated ketones or aldehydes
作者:Barry B. Snider、David J. Rodini、Jan Van Straten
DOI:10.1021/ja00538a028
日期:1980.8
Bostmembrun-Desrut, M.; Kergomard, A.; Renard, M. F., Agricultural and Biological Chemistry, 1983, vol. 47, # 9, p. 1997 - 2000
作者:Bostmembrun-Desrut, M.、Kergomard, A.、Renard, M. F.、Veschambre, H.
DOI:——
日期:——
Catalytic Carbon Insertion into the β-Vinyl C–H Bond of Cyclic Enones with Alkyl Diazoacetates
作者:Sung Il Lee、Byung Chul Kang、Geum-Sook Hwang、Do Hyun Ryu
DOI:10.1021/ol4000026
日期:2013.4.5
The first example of the boron Lewis acid catalyzed C-SP2-H functionalization of cyclic enones was achieved using diazoacetates. The insertion of the carbon atom of diazoacetates utilizes BF3 center dot Et2O or a newly designed oxazaborolidinium ion as a catalyst to afford beta-functionalized cyclic enones from simple cyclic enones In a single step and high yields. The reaction mechanism was investigated with deuterium labeled 2-cyclohexen-1-one.