865-49-6Relevant articles and documents
Brower,Hughes
, p. 7591,7592, 7595 (1978)
Kluger
, p. 2045 (1964)
Earing,Cloke
, p. 769 (1951)
A straightforward catalytic approach to obtain deuterated chloroform at room temperature
Higuera-Padilla, Angel Ruben,Kock, Flávio Vinícius Crizóstomo,Batista, Alzir Azevedo,Colnago, Luiz Alberto
, p. 917 - 920 (2020)
We report the catalytic activity for the complexes—cis-[RuCl2(dppb)(bipy)] (A), and [η6-(p-cymene)Ru (dppb)Cl]PF6 (B), wherein dppb = 1,4-bis(diphenylphosphine)butane, and bipy = 2,2′-bipyridine—for the synthesis of CDCl3 from CHCl3 using D2O as deuterium source. H/D exchange reactions were performed using a chloroform/D2O, 1:2 molar ratio, vigorously stirred, at room temperature. One mole of KOH was dissolved in D2O fraction and catalytic complexes from 0.002 to 0.05 mmol were dissolved in chloroform. The H/D exchange reactions were monitored using 13C nuclear magnetic resonance sequences without proton decoupling. The reaction using 0.01 mmol of compound A reached approximately 55percent of H/D conversion in 1 h. In the same time, the reactions with 0.002 mmol of compound A and without catalyst show approximately 28percent and 3percent H/D exchange, respectively. Without the catalysts, the H/D exchange was only 12.0percent in 5 h. For compound B, 55percent H/D conversion was observed in 1 h, only when 0.05 mmol was used, which is much higher catalyst concentration. After the isolation of the chloroform fraction and two more addition of D2O, it was possible to obtain 95.0percent H/D exchange in approximately 3 h, using 0.01 mmol of the compound A. Therefore, compound A is an efficient catalyst for a rapid and straightforward synthesis of CDCl3 from CHCl3 at room temperature and using D2O as deuterium source.
Novel chiral derivatizing reagent for the determination of enantiomeric excesses
-
, (2008/06/13)
A method for the determination of the enantiomeric composition of a chiral compound comprising (a) derivatising said chiral compound with a enantiomerically and diastereomerically pure compound of general formula I and (b) analysing the resulting mixture by an analytic technique. wherein Ar is an optionally substituted aromatic or heteroaromatic group.
Organophotoreceptor with a compound having a toluidine group
-
, (2008/06/13)
An improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate wherein the photoconductive element comprisesa) a charge transport material with the following formula where R1 and R2 are, independently, a carbazolyl group, an (N,N-disubstituted) aminoaryl group, such as a triphenyl amine group, or a julolidine group, and R3 and R4 are, independently, hydrogen, branched or linear alkyl group (e.g., a C1-C20 alkyl group), branched or linear unsaturated hydrocarbon group, cycloalkyl group (e.g. cyclohexyl group), or aryl group (e.g., phenyl group, naphthyl group, stilbenyl group, (9H-fluoren-9-ylidene)benzyl group, or tolanyl group);(b) an optional charge transport compound; and(c) a charge generating compound.
