Synthesis of the C2Symmetric 1,3-Dicyclohexyl-1,3-Propanediol and Diamine Enantiomers
摘要:
The parent C-2-symmetric (R,R)- and (S,S)-1,3-dicyclohexyl-1,3-propanediols and diamines are readily obtained from the corresponding diphenyldiol precursors.
Stereoselective reduction of β hydroxyketones to 1,3-diols highly selective 1,3-asymmetric induction via boron chelates
作者:Koichi Narasaka、Fong-Chang Pai
DOI:10.1016/0040-4020(84)80006-x
日期:1984.1
Highly selective asymmetric induction can be achieved in the reduction of acyclic β-hydroxyketones via boron chelates. Treatment of β-hydroxyketones (1) with tributyl or tri-isobutylborane and successively with sodium borohydride afforded syn-1,3-diols (3) in highly stereo-selective manner, Syn -α-substituted-β -hydroxyketones (8) were also reduced to give syn, syn-1,3-diols (9) exclusively. The reaction
STEREOSELECTIVE SYNTHESIS OF<i>MESO</i>(OR<i>ERYTHRO</i>) 1,3-DIOLS FROM β-HYDROXYKETONES
作者:Koichi Narasaka、Hong Chang Pai
DOI:10.1246/cl.1980.1415
日期:1980.11.5
Meso(or erythro) 1,3-diols are prepared in high stereoselectivity from β-hydroxyketones by the treatment with tributylborane and the successive reduction with sodium borohydride.