A systematic strategy for preparation of uncommon sugars through enzymatic resolution and ring-closing metathesis
摘要:
A systematic synthetic strategy has been developed for producing uncommon sugars. This method involved kinetic resolution allylic alcohol followed by ring-closing-metathesis (RCM) to generate optical pure lactones as the common precursors. After further derivatization, four representative uncommon sugar units were successfully synthesized. (C) 2004 Elsevier Ltd. All rights reserved.
Diastereo- and enantioselective reduction of α,β-diketodithiane with the baker's yeast
作者:Tamotsu Fujisawa、Eiji Kojima、Toshiyuki Itoh、Toshio Sato
DOI:10.1016/s0040-4039(00)95133-5
日期:——
The Baker'syeastreduction of 1-(1,3-dithian-2-yl)-1,2-propanedione gave highly enantio-and diastereoselectively (S)-(+)-(1-1,3-dithian-2-yl)-2-hydroxy-1-propanone or (1S,23-(+)-(1)-(1,3-dithian-2-yl-1,2-propanediol, depending on the reaction time. The hydroxy ketone was reduced with diisobutylaluminum hydride to give (1R,2S)-1-(1,3-dithian-2-yl)-1,2-propanediol with high diastereoselectivity. The
Silyl nitronates and nitrile oxides in organic synthesis. A novel route to d,l-deoxysugars. Use of aluminum oxide as solid phase base for generation of
作者:K.B.G. Torssell、A.C. Hazell、R.G. Hazell
DOI:10.1016/s0040-4020(01)91358-4
日期:1985.1
to a diene. 2. Stereospecific hydroxylation of the double bond. 3. Unmasking of the aldol moiety by catalytic reduction of the 2-isoxazoline. The syntheses of D,L-deoxyribose, D,L-oleose, D,L-digitoxose, D,L-2-deoxygalactose, 1,3-dideoxyfructose, 3-deoxyfructose etc. are described. Basic aluminum oxide is introduced as a solid phase base for the one step synthesis of 2-isoxazolines from aldoximes and
Use of the Perdeuteroallyl Protecting Group Facile and straightforward transformations of propynoic acid into perdeuterated allyl bromide are described. The advantage of the pentadeuteroallyl protection for the 1H-N.M.R. structure elucidation of complex carbohydrate derivatives is demonstrated in the 2,6-dideoxy-L-ribo-series.
[EN] SEQUANAMYCIN MACROLIDES USEFUL IN THE TREATMENT OF TUBERCULOSIS<br/>[FR] MACROLIDES DE SÉQUANAMYCINE UTILES DANS LE TRAITEMENT DE LA TUBERCULOSE
申请人:SANOFI SA
公开号:WO2019020759A1
公开(公告)日:2019-01-31
The present invention relates to the compounds of formula (I), this process of preparation, and the therapeutic uses thereof. These macrolides of formula (I) are useful in the treatment of tuberculosis.