Abstract:
The present invention provides a composition including a polar organic extract of Eurycoma longifolia and a fraction derived from the polar organic extract, said composition comprising of quassinoids, coumarins, their glycosides, analogues and derivatives, which exhibits bioactivity of increasing spermatozoa production and spermatozoa quality in terms of morphology and motility, as well as increasing testosterone synthesis and release from cells of males. The extraction method of E. longifolia plant to produce the polar organic extract, and the subsequent purification to produce the fraction of polar organic extract containing the quassinoids, coumarins, their glycosides, analogues and derivatives, and uses for manufacturing a preparation for infertility treatment are also provided. The fraction of polar organic extract containing the quassinoids, coumarins, their glycosides, analogues and derivatives is formulated for medical applications via several routes of administration.
Abstract translation:本发明提供了一种组合物,其包含长尾a的极性有机提取物和衍生自极性有机提取物的级分,所述组合物包含类醌,香豆素,其糖苷,类似物和衍生物,其显示出增加精子产生和精子质量的生物活性 形态和运动条件,以及增加男性睾酮合成和释放。 E. longifolia植物的生产极性有机提取物的提取方法,随后的纯化生产含有类醌,香豆素,其糖苷,类似物和衍生物的极性有机提取物的部分,以及用于制造不孕症治疗的制剂的用途是 也提供。 含有类醌,香豆素,其糖苷,类似物和衍生物的极性有机提取物的部分通过几种给药途径配制用于医疗应用。
Abstract:
Free-flowing, non-agglomerating and attrition resistant, substantially spherical solid beads/spherules of a coumarin compound, advantageously having a particle size ranging from 100 .mu.m to 2,000 .mu.m, a loose bulk density ranging from 0.25 to 0.8 and a compressive strength ranging from 500 to 10,000 N/m.sup.2, dissolve rapidly in ethanol and are conveniently prepared by prilling/fragmenting a melt of the coumarin compound into a stream of a cooling gas.
Abstract translation:香豆素化合物的自由流动,非附聚和耐磨损,基本上球形的固体珠/小球,有利地具有100μm至2,000μm的粒度,0.25至0.8的松散堆积密度和0.25至0.8的压缩强度 范围在500至10,000N / m 2之间,迅速溶解在乙醇中,通过将香豆素化合物的熔体造粒/碎裂成冷却气体流方便地制备。
Abstract:
The present invention relates to a process for the preparation of aldehydes by hydrogen reduction of carboxylic acids, esters or anhydrides, characterized in that the reduction is conducted in the vapour phase, in the presence of a bimetallic catalyst of the ruthenium/tin type.
Abstract:
A process for producing a coumarin derivative represented by formula (II): ##STR1## wherein R.sub.1 to R.sub.4 are as defined in the specification, comprising the step of: subjecting to a ring formation and dehydrogenation reaction a 3-(2-cyclohexanoyl)-propionic acid ester derivative represented by formula (I): ##STR2## wherein R.sub.1 to R.sub.4 are as defined in the specification, the ring formation and dehydrogenation reaction being (1) conducted by use of a catalyst comprising a carrier having supported thereon palladium and either of chromium oxide and chromium hydroxide, or (2) conducted by use of a catalyst comprising a carrier having supported thereon palladium or a catalyst comprising a carrier having supported thereon palladium and either of chromium oxide and chromium hydroxide, in the presence of a promoter which is at least one member selected from the group consisting of magnesium trisilicate, zirconia, metallic chromium, and metallic tungsten.
Abstract:
A process for dehydrogenating hexahydrocoumarin or alkylated derivatives thereof is disclosed, wherein the selection of specific process conditions allows substantial amounts of coumarin or alkylated derivatives thereof to be produced along with dihydrocoumarin or alkylated derivatives thereof. The hexahydrocoumarin or derivatives are contacted with the catalyst at about the dehydrogenation temperature and then are dehydrogenated in the presence of a Group VIII metal dehydrogenation catalyst in the liquid phase at a temperature of 200*-375*C while removing hydrogen from the reaction zone, and the reaction product contains coumarin or alkylated derivatives thereof in a molar ratio of coumarin compounds:dihydrocoumarin compounds of at least 1:5. Coumarin and dihydrocoumarin, as well as alkylated derivatives thereof, are known compounds which are used in the fragance industry.
Abstract:
An organic light-emitting device comprising: a first electrode; a second electrode facing the first electrode; and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer comprises an emission layer and a fluorescent compound, wherein the fluorescent compound comprises a 3n-π*-to-1π-π* energy transition from a 3n-π* excited state to a 1π-π* excited state, an energy level in a 1n-π* excited state of the fluorescent compound is greater than an energy level in the 1π-π* excited state of the fluorescent compound, the fluorescent compound emits a fluorescent light by radiative energy transition of an exciton in the 1π-π* excited state to a ground state, and the energy level in the 1n-π* excited state, the energy level in the 1π-π* excited state, and the energy level in the 3n-π* excited state are each independently calculated by using a time dependent-Density Functional Theory method.
Abstract:
A process for producing coumarin and substituted coumarins starting from substituted hexahydrocoumarins or from substituted dihydrocoumarins. The process includes dehydrogenation in the presence of catalysts based on metals of Group VIII of the periodic table of the elements and in the presence of at least one easily reducible organic compound. The invention allows to achieve exceptionally high yields that do not require the recycling of the hexahydrocoumarin or of the dihydrocoumarin that are present at the end of the reaction, and also allows to achieve high selectivity and easy purification.
Abstract:
A process for the preparation of aldehydes by hydrogen reduction of carboxylic acids, esters or anhydrides, characterized in that the reduction conducted in the vapor phase, in the presence of a bimetallic catalyst of the ruthenium/tin type.
Abstract:
A process for producing a 3,4-dihydrocoumarin compound represented by formula (II): ##STR1## wherein R.sub.1 to R.sub.4 are as defined in the specification, comprising the steps of:(1) heating a 3-(2-cyclohexanoyl)propionic acid ester compound represented by formula (I): ##STR2## wherein R.sub.1 R.sub.5 are as defined in the specification, in the presence of at least one solid metal catalyst, thereby to allow said compound of formula (I) to undergo ring formation and dehydrogenation to yield said 3,4-dihydrocoumarin compound of formula (II) and, as a by-product, a coumarin compound represented by formula (III): ##STR3## wherein R.sub.1 to R.sub.4 are as defined above; (2) adding a catalyst which is as defined above to said reaction mixture, or bringing said reaction mixture into contact with oxygen to activate said catalyst used in said ring formation and dehydrogenation, without separating said coumarin compound from the reaction mixture that has undergone said ring formation and dehydrogenation; and(3) partially hydrogenating said by-product coumarin compound in said reaction mixture with hydrogen so as to convert said coumarin compound to a 3,4-dihydrocoumarin compound.
Abstract:
Coumarin compounds may be produced by the conversion of o-hydroxycinnamates or o-hydroxycinnamic acids in the presence of catalysts comprising compounds containing metals of Group VIII of the Periodic Table.