摘要:
Described herein is a process for the manufacture of hydrofluoroalkanols of the structure RfCFClCHROH, comprising reacting a halofluorocarbon of the structure RfCFX2, wherein each X is independently selected from Cl, Br, and I, with an aldehyde and a reactive metal in a reaction solvent to generate a reaction product comprising a metal hydrofluoroalkoxide, neutralizing said metal hydrofluoroalkoxide to produce a hydrofluoroalkanol, and recovering the hydrofluoroalkanol. Also described herein are methods of manufacturing hydrofluoroalkenes of the structure RfCF=CHR from halofluorocarbons of the structure RfCFX2, wherein each X is independently selected from Cl, Br, and I, comprising (1) reacting halofluorocarbons of the structure RfCFX2, wherein each X is independently selected from Cl, Br, and I, with an aldehyde and a reactive metal to generate a reaction product comprising a metal hydrofluoroalkoxide, and reductively dehydroxyhalogenating said metal hydrofluoroalkoxide to produce a hydrofluoroalkene or (2) reacting a hydrofluoroalkanol of the structure RfCFXCHROH or a hydrofluoroalkoxide of the structure RfCFXCHROMX, wherein M is a reactive metal in the +2 oxidation state, with a carboxylic acid anhydride and a reactive metal in a reaction solvent to form a hydrofluoroalkene and isolating the hydrofluoroalkene. In particular, 2,3,3,3,-tetrafluoro-1-propene may be manufactured with this process. Also described are compounds of the formula RfCFClCHROC(=O)R'.
摘要:
Disclosed is a magnesium compound obtained by reacting the following components (i), (ii) and (iii). (i) Metal magnesium (ii) Alcohol (iii) A metal dihalide compound represented by the general formula (I) below wherein M is not less than 0.001 mole relative to 1 mole of magnesium in the metal magnesium (i). MX2 (I) (In the formula, X represents a halogen atom and M represents Mn, Fe, Co or Zn.)
摘要:
Ti, Zr Hf and La precursors for use in MOCVD techniques have a ligand of the general formula OCR (R )CH2X, wherein R is H or an alkyl group, R is an optionally substituted alkyl group and X is selected from OR and NR2, wherein R is an alkyl group or a substituted alkyl group.
摘要:
The present invention provides a continuous melt process for the preparation of a unique zinc oxide/pentaerythritol chemical product that can be used as a stabilizer. The process comprises the steps of providing a continuous processor having a product feed zone, a reaction zone, and a discharge zone; feeding zinc oxide and pentaerythritol into the product feed zone and providing a raw material mixture comprising the zinc oxide and said pentaerythritol; maintaining a temperature of from about 185 DEG C to about 245 DEG C in the reaction zone; maintaining a temperature of from about 185 DEG C to about 245 DEG C in the discharge zone; transporting the raw material mixture into the reaction zone and maintaining a residence time for the raw material mixture in the transition zone of from about 10 to about 60 seconds so as to provide a reacted chemical product; transporting the reacted product into said discharge zone; and removing the reacted chemical product from the discharge zone.
摘要:
A series of phenylalkylaminoalkyl derivatives of Formula I
wherein Ar is naphtyl or phenyl; R¹ is hydrogen, fluoro or R⁴CONH-; R² is hydrogen or C₁ - ₆ alkyl; R₃ is C₁ - ₆ alkyl; R⁴ is C₁ - ₆ alkyl or phenyl- C₁ - ₆ alkyl; x is zero or the integers 1 and 2; m is selected from the integers 1 to 6; and n is selected from the integers 2 and 3, has been found to provide effective antiischemic protection for CNS tissue, particularly neurons. A method of treatment to protect against CNS ischemia, such as that resulting from trauma or stroke or other ischemic conditions, comprises administration of these novel compounds to an individual in need of such treatment.
摘要翻译:一系列式I的苯基烷基氨基烷基衍生物其中Ar是萘基或苯基; R 1是氢,氟或R 4 CONH-; R 2是氢或C 1-6烷基; R3是C1-6烷基; R 4是C 1-6烷基或苯基-C 1-6烷基; x为零或整数1和2; m选自整数1至6; 并且已经发现n从整数2和3中选择,为CNS组织,特别是神经元提供有效的抗缺血保护。 用于保护CNS缺血的治疗方法,例如由外伤或中风或其它缺血状况引起的CNS缺血的方法包括向需要这种治疗的个体施用这些新化合物。
摘要:
Procédé de préparation d'un dérivé énolique à partir d'une cétone, par l'action d'un composé organométallique, ce composé étant un organo-manganeux mixte conduisant à la formation d'un énolate de Mn.
摘要:
Metal alkoxides, including those not containing ligands derived from an alkoxy alcohol, can be solubilized in an alkoxyalkanol solvent. The resulting solution is useful in the fabrication of metal oxide films on a substrate.
摘要:
Tin tetra-alkoxides absent halogenic impurities are prepared by a two-step process comprising a first step reaction of tin tetrahalide with an alcohol and ammonia. A second step reacts the product of the first step with a metal amide and additional alcohol. An alternative second step reacts the product of the first step with a metal alkoxide.