Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Novel Oxidative, Liquid-Phase Chlorination Procedures for the Preparation of (Dichloroiodo)arenes from Iodoarenes

100%

Obeid N. , Skulski L.

Polish Journal of Chemistry

2000

tom Vol. 74, nr 11

1609-1615

One improved and eight novel oxidative, liquid-phase chlorination procedures for the preparation of (dichloroiodo)arenes, ArICl2, from iodoarenes, ArI, are presented in this paper.KMnO4, activatedMnO2, KCIO3, NaIO4, NaIO3źH2O, concentrated nitric acid, sodium perborate monohydrate, sodium percarbonate, and a stable ureaźH2O2 complex are used as oxidants, which oxidize hydrochloric acid to produce in situ a very active chlorine. The crude yields for the PhICl2 obtained are good or excellent (63.5–99%).

Improved syntheses of some diaryliodonium salts from symmetric diarylmercurials and (dichloroiodo)arenes (Willgerodt method)

100%

Skulski L. , Wroczyński P.

Bulletin of the Polish Academy of Sciences. Chemistry

1999

tom Vol. 47, No. 3

231-238

Extensive experiments with the title method enabled us to synthesize the fol-lowing unsymmetric iodonium salts (in crude yields given): (i) 4-acetamidophenyl-phenyl-iodonium iodide (80% ) from 4,4'-mercuriobis( acetanilide) and (dichloroiodo)benzene; (ii) 4-dimethylaminophenyl-phenyliodonium chloride (60%) from 4,4'-mercuriobis(N,N -dimethylaniline) and ( dichloroiodo )benzene. Attempts to synthesize 8-(phenyliodonio )caf-feine iodide from 8,8'-mercuriobis( caffeine) and ( dichloroiodo )benzene were unsuccessful. Hence, 8-( 4-methoxyphenyliodonio ) caffeine bromide (49%), the first iodine(III) derivative of caffeine, was obtained otherwise, i.e. from 8-iodocaffeine and anisole by the short-cut, oxidative method worked up in our laboratory (1995).