4514 results about "Alkylbenzenes" patented technology

A self-adaptive cement system includes cement, water and at least one additive that reacts or and expands in contact with oil and gas. Several chemical products have been identified including rubber alkylstyrene, polynorbornene, resins such precrosslinked substituted vinyl acrylate copolymers and diatomaceous earth. These additives have the effect of making the cement self-healing in the event of physical failure or damage such as micro-annuli. The self healing property is produced by the contact with subterranean hydrocarbon fluids, the potential repair mechanism is thus activated if and when needed in case of start of loss of zonal isolation. In another embodiment, the expansion is deliberately induced by pumping a hydrocarbon fluid in the vicinity of the set cement.

A silane composition for preparing a semiconductor thin films of a solar cell is disclosed. The silane composition contains a polysilane compound represented by the formula SinRm (n is an integer of 3 or more, m is an integer of n to (2n+2) and an m number of R's are each independently a hydrogen atom, alkyl group, phenyl group or halogen atom, with the proviso that when all the m number of R's are hydrogen atoms and m=2n, n is an integer of 7 or more), and at least one silane compound selected from cyclopentasilane, cyclohexasilane and silylcyclopentasilane.

Treating or preventing the early stages of degeneration of articular cartilage or subchondral bone in the affected joint of a mammal is accomplished by administering a chondroprotective compound of Formula (I):where A is hydroxy, (C1-C4)alkoxy, amino, hydroxy-amino, mono-(C1-C2)alkylamino, di-(C1-C2)alkylamino; X and Y are independently H or (C1-C2)alkyl; and n is 1 or 2; R6 is halogen, (C1-C3)alkyl, trifluoromethyl, or nitro; R9 is H; (C1-C2)alkyl; phenyl or phenyl-(C1-C2)alkyl, where phenyl is optionally mono-substituted by fluoro or chloro; -C(=O)-R, where R is (C1-C2)alkyl or phenyl, optionally mono-substituted by fluoro or chloro; or -C(=O)-O-R', where R1 is (C1-C2)alkyl.This treatment ameliorates, diminishes, actively treats, reverses or prevents any injury, damage or loss of articular cartilage or subchondral bone subsequent to said early stage of said degeneration. Whether or not a mammal needs such treatment is determined by whether or not it exhibits a statistically significant deviation from normal standard values in synovial fluid or membrane from the affected joint, with respect to at least five of the following substances: increased interleukin-1 beta (IL-1beta); increased tumor necrosis factor alpha (TNFalpha); increased ratio of IL-1beta to IL-1 receptor antagonist protein (IRAP); increased expression of p55 TNF receptors (p55 TNF-R); increased interleukin-6 (IL-6); increased leukemia inhibitory factor (LIF); decreased insulin-like growth factor-1 (IGF-1); decreased transforming growth factor beta (TGFbeta); decreased platelet-derived growth factor (PDGF); decreased basic fibroblast growth factor (b-FGF); increased keratan sulfate; increased stromelysin; increased ratio of stromelysin to tissue inhibitor of metalloproteases (TIMP); increased osteocalcin; increased alkaline phosphatase; increased cAMP responsive to hormone challenge; increased urokinase plasminogen activator (uPA); increased cartilage oligomeric matrix protein; and increased collagenase.

Synthetic pathways are disclosed for synthesizing derivatives or analogs of fentanyl. Specifically set out are pathways for synthesizing alfentanil, sufentanil and remifentanil. The disclosed methods require fewer steps and produce a greater yield of product than methods reported in the prior art. The pathways to all these compounds begin with a common pathway of condensing a piperidone with a primary amine so as to form a 4-amino carboxyamino-piperidine, wherein N of said piperidone is a —N—COO—(CH2)nCH3, alkylating an N of said primary amine which was condensed with said piperidone thereby producing an N-alkyl-anilide, and hydrolyzing said —COO—(CH2)nCH3? group of said 4-amino-4-carboxyamino-piperidine following the condensation reaction so as to form a piperidine hydrolysis product. This product can then be convened to remifentanil in a 4 step reaction. Also, this hydrolysis product can be treated with a hydride to yield a 4-hydroxymthyl-piperidine which can be converted to alfentanil in 3 further steps, to sufentanil in 3 more steps, or to a variety of remifentanil analogs in two steps.

The invention discloses phosphorescent luminescent materials and a preparation method and application thereof. The invention is characterized in that the phosphorescent luminescent materials are red light materials containing a metal iridium complex; a structural general formula of the phosphorescent luminescent materials is shown in the specification; and in the structural general formula, R1 and R2 are independently one of alkyl, phenyl, halogen-substituted phenyl, alkyl-substituted phenyl, naphthyl, anthryl, a halogen substituent, methoxy, phenoxy, cyano-substituted carbazolyl, substituted N-phenylcarbazolyl, quinolyl, thiazolyl, thienyl, an aromatic amino group, a group with an azole structure, an aromatic heterocyclic radical, a substituted aromatic heterocyclic radical and a silicon alkyl substituent respectively. The phosphorescent materials have high luminous efficiency; and the high luminous efficiency shows that the compounds can be taken as luminescent materials or main luminescent materials and applied to electroluminescent devices. Through data test and comparison, the materials are organic electroluminescent materials which have excellent performance and a good prospect, and particularly are phosphorescent red light materials which have good performance; and moreover, a method for synthesizing the luminescent materials is simple and low in cost.