Enantioselectivity in the Biotransformation of Mono- and Bicyclic Monoterpenoids with the Cultured Cells of<i>Nicotiana tabacum</i>
作者:Hiroki Hamada
DOI:10.1246/bcsj.61.869
日期:1988.3
The biotransformation of the enantiomeric pairs of p-menthane and bicyclo[2.2.1] and [3.1.1]heptane derivatives with the culturedcells of Nicotianatabacum was investigated. It was found that (i) the culturedcells discriminate the enantiomers of p-menthan-2-ol and bicyclo[2.2.1]heptan-2-ol and bicyclo[3.1.1]heptan-3-ol derivatives, and enantioselectively convert these alcohols to the corresponding
inherent double controlled strategy of sterically hindered propargyl alcohols without the installing of external directing groups. Its synthetic robustness and practicality have been illustrated by the concise synthesis of bervastatin, a hypolipidemic drug, and late‐stage modification of complex alkynes with precise regioselectivity.
A short and efficient synthesis of a diterpenoid with a 1,2-seco-cladiellane carbon skeleton is described, starting from geraniol and carvone. One-step oxidative cyclization with a RuO2/NaIO4 system leads to two diastereomeric, bicyclic triols, which contain six stereogenic centers and will be helpful in the synthesis of eleutherobin. The stereochemical outcome of this cyclization has been determined
Microbial Baeyer–Villiger oxidation of terpenones by recombinant whole-cell biocatalysts—formation of enantiocomplementary regioisomeric lactones
作者:Petra Černuchová、Marko D. Mihovilovic
DOI:10.1039/b703175k
日期:——
Recombinant whole-cell expression systems for BaeyerâVilliger monooxygenases of various bacterial origin were utilized in the regiodivergent biooxidation of cyclic terpenones enabling access to enantio- and regioisomeric lactones on preparative scale.
Stereoselective synthesis of (6R)- and (6S)-diosphenol and Ψ-diosphenol
作者:David F Schneider、Murray S Viljoen
DOI:10.1016/s0040-4020(02)00492-1
日期:2002.6
Methods are discussed for the stereoselective synthesis of the (R)-and (S)-enantiomers of the diosphenols (5)–(8) by utilizing the commercially available stereoisomers (9), (12), (23) and (25) of carvone and limonene, respectively, as chiral starting materials.