2-(Chlorodiisopropylsilyl)-6-(trimethylsilyl)phenyl triflate serves as an efficient aryne precursor for intramolecular benzyne [4 + 2] or (2 + 2 + 2) cycloadditions. Key features of this precursor are (1) rapid connection of various arynophiles to the precursor via a Si–O bond and (2) generation of aryne undermildconditions using a combination of Cs2CO3 and 18-crown-6.
Diastereoselective Addition Reactions of Furyl Aldehydes Using Chiral Boronates as Auxiliary: Application to the Enantioselective Synthesis of 2,3-Disubstituted Furyl Alcohols
作者:Kin-Fai Chan、Henry N. C. Wong
DOI:10.1021/ol010196n
日期:2001.12.1
[reaction: see text] The addition reactions of various nucleophiles to a furyl aldehyde bearing a chiral boronate at the C-3 position furnished chromatographically separable diastereomers. The R diastereoselection was more favorable when no additive was added. Surprisingly, when lithium alkoxides were selected as additives, the S diastereoselection is superior instead. Further transformation of C-B
Programmed Polyene Cyclization Enabled by Chromophore Disruption
作者:Megan M. Solans、Vitalii S. Basistyi、James A. Law、Noah M. Bartfield、James H. Frederich
DOI:10.1021/jacs.2c02144
日期:2022.4.13
A new polyenecyclization strategy exploiting β-ionyl derivatives was developed. Photoinduced deconjugation of the extended π-system within these chromophores unveils a contrathermodynamic polyene that engages in a Heck bicyclization to afford [4.4.1]-propellanes. This cascade improves upon the limited regioselectivity achieved using existing biomimetic tactics and tolerates both electron-rich and
Partially Saturated Tricyclic Compounds and Methods of Making and Using Same
申请人:Cramp Susan Mary
公开号:US20140088078A1
公开(公告)日:2014-03-27
The invention provides tricyclic compounds and their use in treating medical disorders, such as obesity. Pharmaceutical compositions and methods of making various tricyclic compounds are provided. The compounds are contemplated to have activity against methionyl aminopeptidase 2.
Partially saturated tricyclic compounds and methods of making and using same
申请人:Cramp Susan Mary
公开号:US09290472B2
公开(公告)日:2016-03-22
The invention provides tricyclic compounds and their use in treating medical disorders, such as obesity. Pharmaceutical compositions and methods of making various tricyclic compounds are provided. The compounds are contemplated to have activity against methionyl aminopeptidase 2.