摘要:
A modified opioid is provided comprising modified morphine molecules, wherein for each morphine molecule, one or more carbon atoms are replaced with silicon atoms. A method is further provided for modifying an opioid comprising morphine molecules, said method comprising the step of replacing one or more carbon atoms with silicon atoms.
摘要:
Metallic clusters can be produced by contacting a metal salt such as a metal nitrate with an organic reducing agent. Metals can be selected from a group consisting of metals exhibiting octahedral coordination, and nitrates of the selected metal or metals are contacted with, for example nitrosobenzene. Binary, tertiary, or other clusters can be produced.
摘要:
The present invention relates to a metal complex of the general formula M(L)n, wherein each L is independently selected and represents a ligand and at least one L is vitamin B12 (cyanocobalamin) or a derivative thereof bound through the nitrogen atom of its cyanide group to M, which is an element selected from the transition metals, thus, forming a M-NC—[Co] moiety with [Co] representing vitamin B12 without cyanide and wherein n is 1, 2, 3, 4, 5 or 6. The complex can be prepared by mixing a precursor molecule with vitamin B12. The metal complexes can be used for radiodiagnostics, chemotherapy and radionuclide therapy.
摘要:
A system comprising solid media and a gaseous atmosphere, said solid media having a first condition which is hydrogenated and a second condition which is partially or fully dehydrogenated relative to said first condition, and wherein said gaseous atmosphere comprises nitrogen.
摘要:
There is provided a process for preparing a lithium amide composition in which in a first step lithium metal is brought into contact with ammonia to form lithium bronze and in a second step the lithium bronze is reacted with a 1,3-diene or an arylolefin, such as butadiene, isoprene, piperylene, dimethylbutadiene, hexadiene, styrene, methyl styrene, divinylbenzene, naphthalene or anthracene, in the presence of a solvent wherein the temperature is maintained at or below the boiling point of ammonia. Examples of solvents include pentane, cyclopentane, hexane, heptane, octane, cyclohexane, toluene, xylene, cumene, ethyl benzene, tetraline, diethyl ether, tetrahydrofuran (THF), 2-methyl-THF, tetrahydropyran, diisopropyl ether, dibutyl ether, dioxan, methyl-tert-butyl ether or glycol ether. Lithium amide compositions obtainable by said process show improved activity, particularly in reactions involving enolate formation.
摘要:
In one aspect, the invention provides a novel quaternary hydrogen storage composition having a hydrogenated state and a dehydrogenated state. Further, the present invention provides methods of storing hydrogen in a hydrogen storage composition, and methods of releasing hydrogen by reacting a nitride composition and a hydride composition.
摘要:
A system comprising solid media and a gaseous atmosphere, said solid media having a first condition which is hydrogenated and a second condition which is partially or fully dehydrogenated relative to said first condition, and wherein said gaseous atmosphere comprises nitrogen.
摘要:
In one aspect, the invention provides a hydrogen storage composition having a hydrogenated state and a dehydrogenated state. In the hydrogenated state, such composition comprises an amide and a hydride. In a dehydrogenated state, the composition comprises an imide.
摘要:
Fine metallic nitride powders having a high purity are prepared, without causing any plugging or other problems in the reaction apparatus and with easy heat control of the reaction, by reacting a metallic halide with liquid ammonia in the presence of an organic solvent which has a specific gravity higher than that of liquid ammonia, and also is not miscible or is only slightly miscible with liquid ammonia at a reaction temperature. The process according to the present invention is effected by introducing the metallic halide into the lower organic solvent layer of the reaction system.
摘要:
Thioaminophosphazenes containing at least one group of the formula: ##STR1## in which R is H, optionally substituted monovalent hydrocarbyl or optionally substituted divalent hydrocarbyl joining together two nitrogen atoms,R.sup.2 is optionally substituted hydrocarbyl, and represented by the formula: ##STR2## WHEREIN N = 1 TO 100, Y.sup.1 and Y.sup.2 together represent O or S, or each independently represents a monovalent substituent selected from Cl, Br, optionally substituted hydrocarbyl, optionally substituted hydrocarbyloxy and ##STR3## where R has the above meaning and R.sup.1 is H, optionally substituted hydrocarbyl or --SR.sup.2, A is a monovalent substituent of the class defined for Y.sup.1, B is H, R.sup.2, SR.sup.2, COR.sup.2 or SO.sub.2 R.sup.2, or if n is 3 or more, A and B together may represent a direct link between --P=N-- units in a cyclic structure.The products are useful in preventing premature vulcanization in vulcanizable rubber compositions.
摘要翻译:包含至少一种下式的硫代氨基膦腈:其中R是H,任选取代的一价烃基或任选取代的二价烃基,两个氮原子连在一起,R2是任选取代的烃基,由下式表示: (2)在N = 1〜100的情况下,Y1和Y2一起表示O或S,或各自独立地表示选自Cl,Br,任选取代的烃基,任选取代的烃氧基和其中R具有上述 意义和R 1是H,任选取代的烃基或-SR 2,A是为Y 1定义的类别的一价取代基,B是H,R 2,SR 2,COR 2或SO 2 R 2,或者如果n是3或更多,则A和B可以一起 表示循环结构中的P = N - 单元之间的直接连接。