Tandem Claisen Rearrangement/6-<i>endo</i>Cyclization Approach to Allylated and Prenylated Chromones
作者:Bernd Schmidt、Martin Riemer、Uwe Schilde
DOI:10.1002/ejoc.201501151
日期:2015.12
o-acylphenols reacted upon microwave irradiation to form C-allylated or -prenylated chromone derivatives, depending on the substitution pattern of the arene and the allyl substituent. The reaction proceeds through a tandemClaisen rearrangement and 6-endo-trig or 6-endo-dig cyclization sequence. For prenyl ethers, the tandem sequence can be extended by a Cope rearrangement to furnish 6-prenylchromones.
Organocatalytic Enantioselective Michael–Acetalization–Reduction–Nef Reaction for a One-Pot Entry to the Functionalized Aflatoxin System. Total Synthesis of (−)- Dihydroaflatoxin D<sub>2</sub> and (−)- and (+)-Microminutinin
作者:Wei-Lun Huang、Arun Raja、Bor-Cherng Hong、Gene-Hsiang Lee
DOI:10.1021/acs.orglett.7b01473
日期:2017.7.7
enantioselective synthesis of the aflatoxin system with multiple stereocenters via a sequence of organocatalytic Michael–acetalization–reduction–Nef reactions that proceed with high enantioselectivities (90–99% ee). The one-pot reaction sequence provides a facile entry to the aflatoxin system, including dihydroaflatoxin D2, which includes a formal total synthesis of aflatoxin B2. The first total synthesis of (−)-
[EN] RESORCINOL DERIVATIVES AS HSP90 INHIBITORS<br/>[FR] DÉRIVÉS DU RÉSORCINOL COMME INHIBITEURS DE LA HSP90
申请人:NERVIANO MEDICAL SCIENCES SRL
公开号:WO2010121963A1
公开(公告)日:2010-10-28
The present invention relates to substituted resorcinol derivatives which inhibit the activity of Heat Shock Protein HSP90. The compounds of the invention are therefore useful in treating proliferative diseases such as cancer and neurodegenerative diseases. The present invention also provides processes for preparing these compounds, pharmaceutical compositions comprising them, methods of treating diseases and the pharmaceutical compositions comprising these compounds.
Michael Additions of Highly Basic Enolates to <i>ortho</i>-Quinone Methides
作者:Robert S. Lewis、Christopher J. Garza、Ann T. Dang、Te Kie A. Pedro、William J. Chain
DOI:10.1021/acs.orglett.5b00972
日期:2015.5.1
which ketone or esterenolates and ortho-quinone methides (o-QMs) are generated in situ in a single reaction flask from silylated precursors under the action of anhydrous fluoride is reported. The reaction partners are joined to give a variety of β-(2-hydroxyphenyl)-carbonyl compounds in 32–94% yield in a single laboratory operation. The intermediacy of o-QMs is supported by control experiments utilizing