Intramolecular reactions involving positions C(2), C(6) and (C2), C(7) in the bicyclo[3.3.1]nonane ring system
作者:Roger Bishop、William Parker、James Ronald Stevenson
DOI:10.1039/p19810000565
日期:——
Reactions likely to involve C(2)–C(6) and C(2)–C(7) intramolecular reactions in bicyclo[3.3.1]nonane derivatives are discussed in terms of the conformations available to the ringsystem. While endo-6-hydroxybicyclo[3.3.1]-nonan-2-one (11) incorporated three deuterium atoms (excluding the hydroxy-group) on heating with NaOD, the exo-isomer (17) exchanged the six hydrogens adjacent to the oxygenation
Ein rascher zugang zu optisch aktiven adamantan-derivaten
作者:Gerhard Hoffmann、Rainer Wiartalla
DOI:10.1016/s0040-4039(00)87734-5
日期:——
Stereoselective bioreduction for the resolution of racemic mixtures of bicyclo[3.3.1]nonane-2,6-dione using vegetables
作者:Albinas Zilinskas、Jolanta Sereikaite
DOI:10.1016/j.molcatb.2013.01.022
日期:2013.6
Screening of various vegetables as biocatalysts for the stereoselective bioreduction and resolution of racemic bicyclo[3.3.1]nonane-2,6-dione was performed. Vegetables of the family Apiaceae, i.e. the roots of parsnip (Pastinaca sativa), celery (Apium graveolens), parsley (Petroselinum crispum) and carrot (Daucus carota) were found to be the best. The methodology described here allows the efficient enantioseparation of (+)-enantiomer of bicyclo[3.3.1]nonane-2,6-dione. The reaction time, temperature and the amount of celery roots were optimized and (+)-enantiomer was obtained with the optical purity of 90-98% and the yield of more than 90%. (C) 2013 Elsevier B.V. All rights reserved.