Showing papers on "Intramolecular reaction published in 1972"
19 citations
TL;DR: The data obtained in this study are consistent with the results of prior steady state studies of deactivation of aqueous ribonuclease by H atoms generated either externally or by radiolysis which showed that several amino acids containing divalent sulfur or aromatic groups are chemically altered within one rib onuclease molecule following addition of a single H atom.
16 citations
TL;DR: In this paper, the authors developed methods for intra molecular transfer or intramolecular reaction of the functionalized (R) portion of the carboxylic acid ester.
7 citations
Patent•
28 Nov 1972
TL;DR: An improved process for importing a 2,6-DIMETHYLNAPHTHALENE RICH product is described in this article, where the authors present an improved procedure for obtaining a 2.6-dimethylnaphthalene rich product.
Abstract: AN IMPROVED PROCESS FOR OBTAINING A 2,6-DIMETHYLNAPHTHALENE RICH PRODUCT COMPRISING THE CATALYTIC INTRAMOLECULAR REARRANGEMENT OF DIMETHYLNAPHTHALENES WHOSE CONTENT OF THE DIMETHYLNAPTHALENE FAMILY IS AT LEAST 60% BY WEIGHT AND NOT CONTAINING IN EXCESS OF 10 MOL PERCENT OF TRIMETHYLNAPHTHALENE, USING A MIXTED CATALYST CONSISTING OF (A) 65-95% BY WEIGHT OF A HYDROGEN FORM OF MORDENITE IN WHICH ABOVE 80% BY WEIGHT OF THE METAL CATIONS ARE REPLACED WITH HYDROGEN IONS, AND (B) 35-5% BY WEIGHT OF ASSISTANT CATALYST SELECTED FROM THE GROUP CONSISTING OF BENTONITE AND FULLER''S EARTH
6 citations
2 citations
TL;DR: In this article, the reactions of H atoms, OH radicals and hydrated electrons acting as isolated reagents upon ribonuclease in dilute aqueous solution were studied by the technique of pulse radiolysis-kinetic spectroscopy.
Abstract: The reactions of H atoms, OH radicals and hydrated electrons acting as isolated reagents upon ribonuclease in dilute aqueous solution were studied by the technique of pulse radiolysis-kinetic spectroscopy. The experiments show that initial action of these reagents upon the protein molecule is followed by intramolecular transformations. Two consecutive intramolecular steps have been observed in the reaction of H atoms, with specific rates of approximately 103 sec−1 and 1 sec−1. Some spectral features can be assigned to specific radical sites. For instance, electron adduct to disulfide is formed by the primary action of H atoms at pH 6.6, by the primary action of hydrated electrons at pH 7.6 and by intramolecular reaction of primary product formed by action of OH at pH 7.
1 citations