A divergent and stereoselective approach to phenolic 1,7-dihydroxy-bisabolane sesquiterpenes: asymmetric total synthesis of (+)-curcutetraol, (+)-sydonol, (+)-sydonic acid, and (+)-7-O-methylsydonic acid
摘要:
The combined use of the Sharpless asymmetric epoxidation, a number of stereospecific chemical transformations, and the 3,5-hexadienoic acid benzannulation protocol allowed us to devise a new, divergent, and stereoselective approach to terpenes with a chiral tertiary hydroxyl group at the ortho-position of a phenol functional group. Accordingly, the natural occurring enantiomeric forms of the bisabolane sesquiterpenes (+)-curcutetraol, (+)-sydonol, (+)-sydonic acid, and (+)-7-O-methylsydonic acid were synthesized with high enantiomeric purity starting from geraniol. The latter two acids were prepared in enantioenriched form for the first time. (C) 2013 Elsevier Ltd. All rights reserved.
An efficient general method for the construction of opticallyactive3-hydroxyalkynefunctionalities has been developed using opticallyactive α,β-epoxy alcohols readily accessible from non-chiral allyl alcohol precursors.
[EN] EPOXYAZULENE DERIVATIVES USEFUL FOR TREATING CANCER AND DIABETES<br/>[FR] DÉRIVÉS D'ÉPOXYAZULÈNE UTILES POUR TRAITER LE CANCER ET LE DIABÈTE
申请人:US HEALTH
公开号:WO2016168281A1
公开(公告)日:2016-10-20
Disclosed is a compound of formula (I) in which R1-R5 and X1 are as described herein. Also provided are methods of using a compound of formula (I), including a method of treating cancer and a method of treating diabetes.
Enantioselective Synthesis of (−)-Englerins A and B
作者:Kian Molawi、Nicolas Delpont、Antonio M. Echavarren
DOI:10.1002/anie.201000890
日期:2010.5.3
All that glitters is gold: The total synthesis of the natural enantiomers of englerins A and B has been completed using a gold‐catalyzed stereoselective domino alkyne/alkene/carbonylcyclization of an enyne with an unprotected alcohol group at a stereogenic allylic position (see scheme; TES=triethylsilyl).
[EN] ENGLERIN DERIVATIVES FOR TREATMENT OF CANCER<br/>[FR] DÉRIVÉS D'ENGLÉRINE DANS LE TRAITEMENT DU CANCER
申请人:US HEALTH
公开号:WO2019010298A1
公开(公告)日:2019-01-10
Disclosed is a compound of formula (I) in which a, R1- R5 and X1 are as described herein. Also disclosed are a pharmaceutical composition containing the compound and a method of using the compound for treating cancer, such as renal cancer.