专利号:US-4985567-A 优先权日:1988-03-07 标题:Chiral phosphinopyrrolidine compounds and their use for asymmetric synthesis of optically active compounds 发明人:ACHIWA KAZUO; TAKEDA HIDEO 权利人:KAZUO ACHIWA; FUJI YAKUHIN KOGYO KK 摘要:New chiral phosphinopyrrolidine compounds of the general formula: ##STR1## wherein R 1 is hydrogen or --COA 1 , --COOA 2 , --CONHA 3 , --SO 2 A 4 or --PO(A 5 ) 2 , A 1 , A 2 , A 3 , A 4 and A 5 each represents independently alkyl or aryl, R 2 is phenyl, di(lower-alkyl)aminophenyl, lower-alkoxyphenyl or 3,5-dimethyl-4-methoxyphenyl, and R 3 is phenyl, lower-alkylphenyl, di(lower-alkyl)aminophenyl, lower-alkoxyphenyl or 3,5-dimethyl-4-methoxyphenyl, with the proviso that R 2 and R 3 may not simultaneously by phenyl, p-di(lower-alkyl)-aminophenyl or p-lower-alkoxyphenyl, as well as the use of these compounds as ligand for a metal complex catalyst for asymmetric synthesis of optically active compounds. The new chiral phosphinopyrrolidine compounds are useful ligands which attain both of high optical yield and high reaction efficiency in catalytic asymmetric reduction.
专利号:US-2009088576-A1 优先权日:2006-01-30 标题:Process for the Stereoselective Preparation of Alcohols From Alpha, Beta-Insaturated Compounds 发明人:HEROLD PETER; STUTZ STEFAN; MAH ROBERT; STOJANOVIC ALEKSANDAR; LYOTHIER ISABELLE; BEHNKE DIRK; SPINDLER FELIX; BAPPERT ERHARD 权利人:HEROLD PETER; STUTZ STEFAN; MAH ROBERT; STOJANOVIC ALEKSANDAR; LYOTHIER ISABELLE; BEHNKE DIRK; SPINDLER FELIX; BAPPERT ERHARD 摘要:A process for the synthesis of an alcohol of formula (I), using as intermediate a compound of formula (V).
专利号:US-5187103-A 优先权日:1991-01-31 标题:Colorimetric method and reagent for the assay of lithium in a test sample 发明人:CZECH BRONISLAW P; CHAPOTEAU EDDY; KUMAR ANAND 权利人:MILES INC 摘要:A chromogenic cryptand found to be especially selective in the determination of lithium in blood of the general formula (I): ##STR1## where: n=1 or 2, n R 1 and R 2 , same or different, are hydrogen, lower alkyl, lower alkenyl, or lower alkylidene; and n Q is a chromogenic moiety capable of providing a detectable response upon complexation of said compound with lithium ion and has the structure: ##STR2## wherein: X is CH, C--OH or N; and Z is p-nitrophenylazo, 2,4-dinitrophenylazo, 2,4,6-trinitrophenylazo, p-nitrostyryl, p-benzoquinonemonoimino, bis-(4-dimethylaminophenyl) hydroxymethyl, 3-phenylisothiazolyl-5-azo, thiazolyl-5-azo; or isothiazolyl-5-azo. n A reagent composition and synthesis of a preferred chromogenic cryptand are also disclosed.
专利号:US-4283574-A 优先权日:1980-01-28 标 题:Process for the synthesis of 2,6-xylenol and 2,3,6-trimethylphenol 发明人:LEACH BRUCE E 权利人:CONOCO INC 摘要:Phenol is methylated over an alumina catalyst using methanol, and the reaction product therefrom is combined with additional methanol over a promoted magnesium oxide catalyst. Major reaction products are ortho-cresol, 2,6-xylenol and 2,3,6-trimethylphenol. The promoted magnesium oxide catalyst contains metal promoters selected from the group consisting of titanium, chromium, and uranium together with sulfate ions.
专利号:US-6828466-B2 优先权日:2002-07-19 标题:Process for the synthesis of phenols from arenes 发明人:MALECZKA JR ROBERT E; SMITH III MILTON R; HOLMES DANIEL; SHI FENG 权利人:UNIV MICHIGAN STATE 摘要:A process to synthesize substituted phenols such as those of the general formula RR'R''Ar(OH) wherein R, R', and R'' are each independently hydrogen or any group which does not interfere in the process for synthesizing the substituted phenol including, but not limited to, halo, alkyl, alkoxy, carboxylic ester, amine, amide; and Ar is any variety of aryl or hetroaryl by means of oxidation of substituted arylboronic esters is described. In particular, a metal-catalyzed C-H activation/borylation reaction is described, which when followed by direct oxidation in a single or separate reaction vessel affords phenols without the need for any intermediate manipulations. More particularly, a process wherein Ir-catalyzed borylation of arenes using pinacolborane (HBPin) followed by oxidation of the intermediate arylboronic ester by OXONE is described.
专利号:US-2006035950-A1 优先权日:2004-08-09 标 题:Novel processes for preparing substantially pure anastrozole 发明人:ALNABARI MOHAMMED; FREGER BORIS; ARAD ODED; ZELIKOVITCH LIOR; SERYI YANA; DANON EDNA; DAVIDI GUY; KASPI JOSEPH 权利人:ALNABARI MOHAMMED; FREGER BORIS; ARAD ODED; ZELIKOVITCH LIOR; SERYI YANA; DANON EDNA; DAVIDI GUY; KASPI JOSEPH 摘要:The present invention provides novel processes for purifying anastrozole, devoid of using liquid chromatography. The purification processes are via the isolated anastrozole salt forms, either by crystallization or by selective acidic extractions, and optionally in both cases, converting the purified anastrozole salt to anastrozole base. Also provided is an improved process for the synthesis of anastrozole, which is obtained by alkylating the isolated and purified starting material 3,5-bis(2-cyanoprop-2-yl)benzylbromide, the process being devoid of using toxic, hazardous and environmental unfriendly solvents and reagents.
参考标题:Investigations On Gold‐catalyzed Thioalkyne Activation Toward Facile Synthesis Of Ketene Dithioacetals 作者:Xiaohan Ye,Jin Wang,Shengtao Ding,Seyedmorteza Hosseyni,Lukasz Wojtas,Novruz G. Akhmedov,Xiaodong Shi |发布日期:2017.8.4 摘要:From A Gold‐associated Thioketene Intermediate. Based On This Interesting Mechanistic Insight, A Gold(I)‐catalyzed Thioether Addition To Thioalkynes Was Developed As A Novel Approach To Prepare Ketene Dithioacetals With Good Yields And High Efficiency.
合成参考文献
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