Preparation of a chiral building block based on 1,3-syn-diol using Pseudomonas fluorescens lipase and its application to the synthesis of a hunger modulator.
Preparation of a chiral building block based on 1,3-syn-diol using Pseudomonas fluorescens lipase and its application to the synthesis of a hunger modulator.
A Convenient Synthesis of (2<i>S</i>,4<i>R</i>)-1-Acetoxy-2,4-<i>O</i>-Isopropylidene-1,2,5-Pentanetriol by Using Lipase Catalyzed Regio- and Enantioselective Reactions
作者:Kazutoshi Miyazawa、Naoyuki Yoshida
DOI:10.1246/cl.1993.1529
日期:1993.9
(2S,4R)-1-Acetoxy-2,4-O-isopropylidene-1,2,5-pentanetriol, which is expected to be an intermediate for a synthesis of an inhibitor of HMG-CoA reductase, was synthesized by lipase catalyzed regio- and enantioselective transesterifications.
phenyl 4,4'-bis(oxazoline) [AraBOX] is described. The novel ligand is prepared in two efficient steps from a bis-[(O-silyl)β-amino alcohol], via conversion into an intermediate bis(benzamide) followed by a one-pot deprotection-activation-ring closure (DARC) oxazoline formation. To our knowledge, this is the first reported synthesis of an oxazoline ring via this DARC method. The synthesis of two precursor
Über die pentantetrole-(1,2,4,5) und die Konfiguration der 2,4-Dihydroxyglutarsäuren
作者:B. M. Roth[]、H. Schaltegger
DOI:10.1002/hlca.19640470626
日期:——
Es wurde das meso- bzw. das rac.-Pentantetrol-(l,2,4,5) aus den entsprechenden Dihydroxyglutarsäuren bereitet, Das racemische Tetrol wurde überdie d-campherketale in die Enantiomeren gespalten.
Concise Synthesis of Yashabushidiol A and (±)-Diospongin A
作者:Tse-Lok Ho、Bin Tang、Guohua Ma、Pengfei Xu
DOI:10.1002/jccs.201100664
日期:2012.3
Synthesis of (±)‐diospongin A has been achieved from the (2SR,4RS)‐pentane‐1,2,4,5‐tetraol in six steps. An intermediate has also been converted into yashabushidiol A. This work features a desymmetric cyclization and reduction of a meso‐1,7‐diarylheptanoid precursor to furnish the desired cis‐2,6‐disubstituted tetrahydropyran.
Synthesis of chiral building blocks using Pseudomonas Fluorescens lipase catalyzed asymmetric hydrolysis of Meso diacetates
作者:Zhuo-Feng Xie、Hiroshi Suemune、Kiyoshi Sakai
DOI:10.1016/s0957-4166(00)80142-1
日期:1993.5
Two chiral building blocks were prepared using a lipase-catalyzed asymmetric hydrolysis of the corresponding meso-diacetates. The chirality in the hydrolyzed products was conveniently incorporated into that of (R)-muscone and hunger modulator.