专利号:US-2003162992-A1 优先权日:2001-12-14 标 题 :Preparation of intermediates useful in the synthesis of antiviral nucleosides 发明人:WATANABE KYOICHI A; DU JINFA 摘要:The present invention is an efficient process for the manufacture of α-acyloxyacetaldehyde, a key intermediate in the synthesis of 1,3-oxathiolane and 1,3-dioxolane nucleosides.
专利号:US-10940467-B2 优先权日:2014-01-27 标 题 :Synthesis of molecular sieves having MWW framework structure 发明人:JOHNSON IVY D; HRYCENKO NADYA A 权利人:EXXONMOBIL CHEMICAL PATENTS INC 摘要:The present invention provides an improved method for making molecular sieves having MWW framework structure using precipitated aluminosilicates (PAS), and the use of molecular sieves so made in processes for catalytic conversion of hydrocarbon compounds.
专利号:US-5686645-A 优先权日:1991-10-24 标题:Synthesis of isocyanate precursors from primary formamides 发明人:FARAJ MAHMOUD K 权利人:ARCO CHEM TECH 摘要:A selective process for the production of unsymmetric carbamates and ureas is disclosed. In the process, a primary formamide is reacted with a dialkyl amine or an alcohol in the presence of a Group VIII transition metal catalyst. The unsymmetric carbamates and ureas are useful precursors to isocyanates.
专利号:US-8729283-B2 优先权日:2009-01-29 标 题 :Chain-selective synthesis of fuel components and chemical feedstocks 发明人:OLSON EDWIN S 权利人:ENERGY & ENVIRON RES CT FOUND 摘要:A method comprising providing a starting composition comprising a polyunsaturated fatty acid, a polyunsaturated fatty ester, a carboxylate salt of a polyunsaturated fatty acid, a polyunsaturated triglyceride, or a mixture thereof; self-metathesizing the starting composition or cross-metathesizing the starting composition with at least one short-chain olefin in the presence of a metathesis catalyst to form self-/cross-metathesis products comprising: cyclohexadiene; at least one olefin; and one or more acid-, ester-, or salt-functionalized alkene; and reacting cyclohexadiene to produce at least one cycloalkane or cycloalkane derivatives. A method for producing cycloalkanes for jet fuel by providing a starting composition comprising at least one selected from the group consisting of algal and polyunsaturated vegetable oils, subjecting the starting composition to metathesis to produce metathesis product comprising at least one olefin, cyclohexadiene, and at least one acid-, ester-, or salt-functionalized alkene, and reacting the at least one olefin and cyclohexadiene to form cycloalkane(s).
专利号:US-7833926-B2 优先权日:2005-07-01 标题 :Arylphenoxy catalyst system for producing ethylene homopolymer or copolymers of ethylene and α-olefins 发明人:WOO TAE WOO; OK MYUNG AHN; HAHN JONG SOK; LEE MAL-OU; KANG SANG OOK; KO SUNG-BO; KIM TAE-JIN; KIM SUNG-KWAN 权利人:SK ENERGY CO LTD 摘要:The present invention relates to an arylphenoxy catalyst system producing an ethylene homopolymer or copolymers of ethylene and α-olefins, and a method of producing an ethylene homopolymer or copolymers of ethylene and α-olefins having a high molecular weight under a high temperature solution polymerization condition using the same. The catalyst system includes a group IV arylphenoxy-based transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst. In the transition metal catalyst, a cyclopentadiene derivative and arylphenoxide as fixed ligands are located around the group IV transition metal, arylphenoxide is substituted with at least one aryl derivative and is located at the ortho position thereof, and the ligands are not crosslinked to each other. The catalyst includes an environmentally-friendly raw material, synthesis of the catalyst is economical, and thermal stability of the catalyst is excellent. It is useful for producing an ethylene homopolymer or copolymers of ethylene and α-olefins having various physical properties in commercial polymerization processes.
专利号:US-8207337-B2 优先权日:2007-01-29 标 题:Reagent for organic synthesis reaction containing organic triol borate salt 发明人:MIYAURA NORIO; YAMAMOTO YASUNORI 权利人:MIYAURA NORIO; YAMAMOTO YASUNORI; WAKO PURE CHEM IND LTD 摘要:[Problem] n To provide an organoboron compound-containing reagent for organic synthesis reactions which undergoes no trimerization with dehydration, does not necessitate activation with a base, and is stable and highly active. n [Means for Solving Problems] n The reagent for organic synthesis reactions contains an organic triol borate salt represented by any of the general formulae (I) to (III) and general formula (XVI): (wherein R 1 represents alkyl, alkenyl, etc.; R 2 represents optionally substituted alkyl, alkenyl, alkynyl, etc. or represents hydrogen; m + represents an alkaline metal ion, phosphonium ion, or given ammonium ion; M 2+ represents an alkaline earth metal; X represents halogen or alkoxide; Y represents an alkali metal ion, etc.; A represents optionally substituted methylene; and n represents an integer).