Optical Resolution of <i>C</i><sub>2</sub>-Symmetric Racemic 1,4-Diols with <i>o</i>-Xylylene Structure by Chiral Resolving Agent (<i>S</i>)-ALBO-V
作者:Masatoshi Asami、Lvling Zhong、Naoki Sekiguchi、Kumiko Yamada、Yuya Hiwatashi、Toshiro Taniguchi、Naoya Hosoda、Suguru Ito
DOI:10.1246/bcsj.20150066
日期:2015.7.15
Optical resolution of C2-symmetric racemic 1,4-diols, 1,2-bis(1-hydroxyalkyl)benzene, was examined using (S)-5-allyl-2-oxabicyclo[3.3.0]octene ((S)-ALBO-V) as chiral resolving agent. Diastereomeric...
Reactions selectives des organonagnesiens avec les lactols et les lactones. Synthese des diols primaires-secondaires
作者:P. Canonne、J. Plamondon、M. Akssira
DOI:10.1016/s0040-4020(88)90027-0
日期:1988.1
Synthesis of α,β-unsaturated dioxanes, dioxolanes and dioxepanes by trans-acetalisation of dimethylacetals with meso or C2-symmetrical 1,2-, 1,3- and 1,4-diols
Several o-dibenzylic diols were prepared reacting organometallics with o-phthalaldehyde at room temperature in ether. The identity of the meso and C-2-symmetrical (D,L) isomers as well as their ratio were determined by chiral gas chromatography. The meso and C-2 (racemic) stereoisomeric diols were easily separated by flash chromatography on silica gel. A set of 18 alpha,beta-unsaturated acetals were then prepared reacting those, as well as commercially available 1,2, 1,3 and 1,4 diols, with the corresponding methylacetals in acidic medium. A trans-acetalisation procedure adapted to the cases of fragile allylic alcohols or unfavorable 1,6 diols-derived dioxonanes based on a Dean-Stark trapping of methanol was also employed. (C) 2003 Elsevier Ltd. All rights reserved.
Sanna; Cignarella; Anania, Farmaco, Edizione Scientifica, 1985, vol. 40, # 10, p. 777 - 785
作者:Sanna、Cignarella、Anania、Siri、Desole
DOI:——
日期:——
CANONNE, P.;PLAMONDON, J.;AKSSIRA, M., TETRAHEDRON, 44,(1988) N 10, 2903-2912