Synthesis of β,γ-disubstituted-γ-lactones through a Johnson–Claisen rearrangement: a short route to xylobovide, nor-canadensolide, canadensolide, sporothriolide and santolinolide
摘要:
The Johnson-Claisen rearrangement of allyl alcohols with chiral vicinal diol functionality was employed to access chiral beta,gamma-disubstituted-gamma-lactones in high enantio- and diastereoselectivity. These were efficiently converted into nor-canadensolide, the advanced gamma-(lactone-lactol) intermediate for xylobovide, canadensolide and sporothriolide and the lactone moiety of the santolinolides. (C) 2009 Elsevier Ltd. All rights reserved.
Synthesis of β,γ-disubstituted-γ-lactones through a Johnson–Claisen rearrangement: a short route to xylobovide, nor-canadensolide, canadensolide, sporothriolide and santolinolide
摘要:
The Johnson-Claisen rearrangement of allyl alcohols with chiral vicinal diol functionality was employed to access chiral beta,gamma-disubstituted-gamma-lactones in high enantio- and diastereoselectivity. These were efficiently converted into nor-canadensolide, the advanced gamma-(lactone-lactol) intermediate for xylobovide, canadensolide and sporothriolide and the lactone moiety of the santolinolides. (C) 2009 Elsevier Ltd. All rights reserved.
Process for Preparing 5,7 Diaminopyrazolo [1,5-a] Pyrimidine Compounds
申请人:Liotta Dennis C.
公开号:US20120041198A1
公开(公告)日:2012-02-16
Processes for the preparation of certain 5,7-diaminopyrazolo[1,5-α]pyrimidine compounds comprising the reaction of a primary or secondary amine and a protected 5-halo-7-aminopyrazolo[1,5-α]pyrimidine compound in solvent system comprising water and one or more organic solvents, optionally in the presence of an exogenous base.
ACYCLIC AMINE INHIBITORS OF 5-METHYTIOADENOSINE PHOSPHORYLASE AND NUCLEOSIDASE
申请人:Clinch Keith
公开号:US20110046167A1
公开(公告)日:2011-02-24
The present invention relates to compounds of the general formula (I) which are inhibitors of 5′-methylthioadenosine phosphorylase or 5′-methylthioadenosine nucleosidase. The invention also relates to the use of these compounds in the treatment of diseases or conditions in which it is desirable to inhibit 5′-methylthioadenosine phosphorylase or 5′-methylthioadenosine nucleosidase including cancer, and to pharmaceutical compositions containing the compounds.
Synthesis of β,γ-disubstituted-γ-lactones through a Johnson–Claisen rearrangement: a short route to xylobovide, nor-canadensolide, canadensolide, sporothriolide and santolinolide
作者:Rodney A. Fernandes、Arun B. Ingle、Vijay P. Chavan
DOI:10.1016/j.tetasy.2009.11.018
日期:2009.12
The Johnson-Claisen rearrangement of allyl alcohols with chiral vicinal diol functionality was employed to access chiral beta,gamma-disubstituted-gamma-lactones in high enantio- and diastereoselectivity. These were efficiently converted into nor-canadensolide, the advanced gamma-(lactone-lactol) intermediate for xylobovide, canadensolide and sporothriolide and the lactone moiety of the santolinolides. (C) 2009 Elsevier Ltd. All rights reserved.