METHOD FOR MANUFACTURING TRICYCLODECANE MONO-METHANOL MONOCARBOXYLIC ACID DERIVATIVE
申请人:Kawakami Hiroyuki
公开号:US20120203026A1
公开(公告)日:2012-08-09
Provided is a method for manufacturing a tricyclodecane mono-methanol monocarboxylic acid derivative that can be used as a raw material for high heat-resistant alicyclic polyesters and the like.
The provided method for manufacturing a tricyclodecane mono-methanol monocarboxylic acid derivative is characterized in that a tricyclodecane mono-methanol monocarboxylic acid derivative represented by the following formula (III) is obtained by reacting the dicyclopentadiene represented by the following formula (I) with a formic acid compound in the presence of a catalytic system containing a ruthenium compound, a cobalt compound, and a halide salt, to give a tricyclodecene monocarboxylic acid derivative represented by the formula (II), and then hydroformylating the tricyclodecene monocarboxylic acid derivative.
(in the formulae (II) and (III), R represents a hydrogen, an alkyl group having 1 to 5 carbon atoms, a vinyl group, or a benzyl group.)
New Prodigiosin Derivatives Obtained by Mutasynthesis in <i>Pseudomonas putida</i>
作者:Andreas S. Klein、Andreas Domröse、Patrick Bongen、Hannah U. C. Brass、Thomas Classen、Anita Loeschcke、Thomas Drepper、Luca Laraia、Sonja Sievers、Karl-Erich Jaeger、Jörg Pietruszka
DOI:10.1021/acssynbio.7b00099
日期:2017.9.15
The deeply red-colored natural compound prodigiosin is a representative of the prodiginine alkaloid family, which possesses bioactivities as antimicrobial, antitumor, and antimalarial agents. Various bacteria including the opportunistic human pathogen Serratia marcescens and different members of the Streptomycetaceae and Pseudoalteromonadaceae produce prodiginines. In addition, these microbes generally accumulate many structurally related alkaloids making efficient prodiginine synthesis and purification difficult and expensive. Furthermore, it is known that structurally different natural prodiginine variants display differential bioactivities. In the herein described mutasynthesis approach, 13 different derivatives of prodigiosin were obtained utilizing the GRAS (generally recognized as safe) classified strain Pseudomonas putida KT2440. Genetic engineering of the prodigiosin pathway together with incorporation of synthetic intermediates thus resulted in the formation of a so far unprecedented structural diversity of new prodiginine derivatives in P. putida. Furthermore, the formed products allow reliable conclusions regarding the substrate specificity of PigC, the final condensing enzyme in the prodigiosin biosynthesis pathway of S. marcescens. The biological activity of prodigiosin toward modulation of autophagy was preserved in prodiginine derivatives. One prodiginine derivative displayed more potent autophagy inhibitory activity than the parent compound or the synthetic clinical candidate obatoclax.
[EN] CATALYST FOR DEHYDROGENATION OF 4,5,6,7 TETRAHYDROINDOLE INTO INDOLE AND METHOD FOR PREPARING THEREOF<br/>[FR] CATALYSEUR POUR LA DÉSHYDROGÉNATION DU 4,5,6,7-TÉTRAHYDROINDOLE EN INDOLE ET PROCÉDÉ SERVANT À PRÉPARER CELUI-CI
申请人:A E FAVORSKY IR I OF CHEMISTRY
公开号:WO2008147246A1
公开(公告)日:2008-12-04
[EN] The present invention relates generally to the field of organic synthesis. More particularly, this invention pertains to catalysis for the process of heterocyclic compounds dehydrogenation, precisely to a method for preparing catalyst of 4,5,6,7-tetrahydroindole dehydrogenation to indole. A new catalyst system contains nickel sulfide deposited on aluminum oxide and doped with sodium and chlorine ions. The method for catalyst preparing includes aluminum oxide treatment with nickel chloride in aqueous media in the presence of surfactant (sodium dodecylsulfonate) and further reaction with sulfide of alkali metal in aqueous medium in the presence of hydrochloric acid at room temperature. The catalyst is isolated by filtration without additional washing that promotes simultaneous doping of the catalyst with sodium and chlorine ions, the fixing of dopants on catalyst is carried out at IOOOC during 20 hours. Some examples of catalysis process for makeup catalyst, for the same which spent 89 hours in catalysis process and for regenerated one are given. [FR] La présente invention concerne d'une façon générale le domaine de la synthèse organique. Plus particulièrement, cette invention concerne la catalyse pour un procédé de déshydrogénation de composés hétérocycliques, précisément un procédé servant à préparer un catalyseur de déshydrogénation du 4,5,6,7-tétrahydroindole en indole. Le nouveau système catalyseur contient du sulfure de nickel déposé sur de l'oxyde d'aluminium et dopé avec des ions sodium et chlore. Ledit procédé servant à préparer le catalyseur comprend le traitement de l'oxyde d'aluminium avec du chlorure de nickel dans un milieu aqueux en présence d'un tensioactif (le dodécylsulfonate de sodium) et la réaction subséquente avec un sulfure de métal alcalin dans un milieu aqueux en présence d'acide chlorhydrique à température ambiante. Le catalyseur est séparé par filtration sans lavage supplémentaire ce qui favorise le dopage simultané du catalyseur avec des ions sodium et chlore, la fixation des dopants sur le catalyseur étant ensuite effectuée à 100 °C pendant 20 heures. Quelques exemples de procédé de catalyse utilisant du catalyseur fraîchement produit, celui-ci utilisé pendant 89 heures dans un procédé de catalyse et du catalyseur régénéré sont donnés.