Copper-Catalyzed Hydroxylation of Aryl Halides with Tetrabutylammonium Hydroxide: Synthesis of Substituted Phenols and Alkyl Aryl Ethers
作者:Tharmalingam Punniyamurthy、Rajesh Paul、Md Ali
DOI:10.1055/s-0030-1258965
日期:2010.12
hydroxylation of aryl iodides and aryl bromides with tetrabutylammonium hydroxide pentahydrate is described. For this, the combination of copper(I) iodide and 8-hydroxyquinaldine at 70-130 ˚C in a mixture of dimethyl sulfoxide and water (2:3) is used. The resultant phenols can be readily reacted with alkyl and allyl halides in situ to provide the corresponding alkyl or allyl aryl ethers in high yields
Selective nitration versus oxidative dealkylation of hydroquinone ethers with nitrogen dioxide
作者:R. Rathore、E. Bosch、J.K. Kochi
DOI:10.1016/s0040-4020(01)81329-6
日期:1994.1
Various alkyl-substituted p-dialkoxybenzenes (ArH) react readily with nitrogendioxide (NO2) in dichloromethane solution via either nitration (ArNO2) or oxidative dealkylation to quinones (Q). Spectral transients indicate that these coupled processes from the dialkoxybenzene radical cation (ArH+·) formed as the common reactive intermediate from electron-transfer in the disproprtionated precursor [ArH
Four constitutional isomers of BMpillar[5]arene were prepared from 1-butoxy-4-methoxybenzene and they showed different binding abilities with n-octyltrimethyl ammonium hexafluorophosphate.
Copillararene convoy: A linearsupramolecularpolymer can be efficiently constructed in solution with a copillararene monomer (see picture). Single‐crystal X‐ray analysis and NMR spectroscopy revealed that aggregation was enthalpically driven by quadruple CH⋅⋅⋅πinteractions between the octyl tail (blue) and the aromatic cavity (red).
The present invention provides a double-stranded polynucleotide having a sense strand polynucleotide consisting of a nucleotide sequence complementary to a target sequence in a target gene, and an antisense strand polynucleotide having a nucleotide sequence complementary to the sense strand polynucleotide, wherein an aryl or heteroaryl compound is bound to a phosphate group at the 5′-end of the antisense strand polynucleotide.