The absorption and fluorescence spectra, the fluorescence quantum yields and lifetimes of fluorescein and three series of alkylated fluorescein, namely, esters, ethers and ester ethers of fluorescein in SDS, CTAB and TX-100 micelles, were investigated. The interactions between the dyes and micelles, and the existing structure forms of the dyes in micelles were also studied. All alkylated fluore...

substituted naphthofurans and naphthopyrans were constructed at high temperature from allyl or propargyl naphthyl ethers via claisen rearrangement in moderate to good yields. also, substituted (trimethylsilyl)-naphthofurans were synthesized from the corresponding naphtofurans.

Past studies on the toxicological effects of ethylene glycol alkyl ethers as well as the recent data on these chemicals in Japan are reviewed. Only a few researchers have participated in the study of ethylene glycol alkyl ethers in Japan. The effects of ethylene glycol alkyl ethers on testis and embryotoxic effects of ethylene glycol monomethyl ether (EGM) have been studied, as has the teratoge...

nickel (ii) and copper (ii) complexes of highly unsymmetrical tetradentate schiff base have been synthesized by the template reaction of half-units n-(1-hydroxy-2-acetonaphtone)-1-amino-2-phenyleneimine (hl) and n-(2-hydroxyacetophenone)-1-amino-2-phenyleneimine (hl1) with the glyoxalphenylhydrazone. the complexes have been characterized by elemental analyses, conductance, ir, 1h nmr and uv spe...

A palladium-catalyzed oxidative coupling of arene C-H bonds with benzylic ethers via C-H bond activation is described. The reaction proceeds efficiently with a broad range of substrates bearing conventional directing groups with excellent functional group compatibility. This protocol potentially provides opportunities to use dibenzyl ethers as new acyl equivalents for catalytic acylation reacti...

silica chloride converted benzyl or tert-butyl esters to the corresponding acid chlorides and alkyl chlorides. it also converted benzyl or tert-butyl phenyl ethers to the corresponding allcyl chlorides and phenol

Synthesis of unsymmetrical and bifunctional building blocks based on 1,1,3,3-tetramethyldisiloxane is presented which allows compounds with a wide spectrum reactive groups bonded to alkenes alkynes be obtained.

Kathryn Rosica of the Chemical Manufacturers Association raised an interesting point in her letter (EHP vol. 102, p. 1006). Neither the term "glycol ethers" nor the term "ethylene glycol ethers" strictly identifies a class of chemicals whose members all share a common distinctive toxicological profile. As Rosica correctly noted, "Higher molecular weight ethylene glycol monoethers that have been...

Mukaiyama Michael addition of silyl enol ethers 13 to the 1,2-quinone-4-carboxylate 6 (formed in situ by oxidation of the catechol ester 8) afforded the 2-subsituted 7-hydroxybenzofuran-4-carboxylates 14 in fair to good yields. Alkyl and aryl systems work well, but highly electron-rich silyl enol ethers could not be used because of competing oxidation.