CAS: 288-13-1; 1H-Pyrazole

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甘油置于一水合肼,Potassium Iodide,Sodium Iodide,硫酸体系中,160.0 °C,500.01 Kpa 条件下,反应 2.5H,以91.1%的收率获得吡唑
参考文献:吡唑的工业生产方法
标题:吡唑的工业生产方法
摘要:本发明涉及一种吡唑的工业生产方法,属于吡唑的制备技术领域.本发明所述的吡唑的工业生产方法,是向甘油和水合肼的混合溶液中滴加硫酸,一步反应合成吡唑粗品,然后用氨中和过量的硫酸和吸收反应产生的二氧化硫,吡唑粗品经后处理得到吡唑精品.本发明操作简单,成本低,节能环保,收率高,改善了产品色度,提高了产品质量,适合大规模工业化生产和自动化生产.

专利信息

专利号:US-9755163-B2
优先权日:2010-04-30
标 题:Synthesis of four coordinated palladium complexes and their applications in light emitting devices thereof
发明人：LI JIAN; TURNER ERIC
权利人:ARIZONA BOARD OF REGENTS ACTING FOR AND ON BEHALF OF ARIZONA STATE UNIV; ARIZONA BOARD OF REGENTS ACTING FOR OR ON BEHALF OF ARIZONA STATE UNIV
摘要:Synthesis of four coordinated palladium complexes and their applications in light emitting devices thereof.

专利号:US-8822702-B2
优先权日:2002-12-20
标 题 :Synthesis of amines and intermediates for the synthesis thereof
发明人：BERENS ULRICH; DOSENBACH OLIVER; SPRENGER DANIEL
权利人:BERENS ULRICH; DOSENBACH OLIVER; SPRENGER DANIEL; BASF SE
摘要:The invention relates in a first embodiment to a method for the manufacture of esters of the formula I, n nor especially of amides of the formula II,n n nwherein the symbols have the meanings given in the specification, as well as other intermediates and compounds useful in the synthesis of tryptamines and other substances mentioned in the title. The synthesis methods and intermediates are useful in the synthesis of pharmaceuticals.

专利号:US-2024287520-A1
优先权日:2021-06-30
标题:Method for synthesis of linkage modified oligomeric compounds
发明人：RODRIGUEZ ANDREW A
权利人:IONIS PHARMACEUTICALS INC
摘要:The present disclosure provides methods of synthesizing modified oligonucletodies and oligomeric compounds (including oligomeric compounds that are antisense agents or portions thereof) comprising a modified oligonucleotide having at least one modified internucleoside linking group. In certain embodiments, the present disclosure provides stabilized formulations of certain sulfonyl azides for use in the synthesis of olignonucleotides comprising one or more sulfonyl phosphoramidate linkages. Some embodiments provide stabilized compositions of high energy reagents that may be used in the synthesis of modified oligonucleotides, allowing for safe process scale preparation thereof.

专利号:US-2022389226-A1
优先权日:2019-11-15
标 题:A continuous process for the synthesis of azo dyes involving in-situ generation of diazonium salts
发明人：KULKARNI AMOL ARVIND; SHUKLA CHINMAY ABHAY
权利人:COUNCIL SCIENT IND RES
摘要:The present disclosure provides a continuous process for the synthesis coupled compounds of diazonium salts including azo dyes involving in-situ generation of diazonium salts. It further discloses a set up to carry out the process for the synthesis of coupled compounds of diazonium salts.

专利号:US-2008086013-A1
优先权日:2006-06-15
标 题:Carbometallation of alkynes and improved synthesis of uniquinones
发明人：LIPSHUTZ BRUCE H
权利人:UNIV CALIFORNIA
摘要:Methods for the carbometallation of alkynes are presented. Those are useful for the synthesis of CoQ 10 and other ubiquinones as well as for the synthesis of ubiquinol analogs.

专利号:US-8642809-B2
优先权日:2007-09-25
标 题:Methods of synthesis of certain hydroxamic acid compounds
发明人：REISCH HELGE A; LEEMING PETER; RAJE PRASAD S
权利人:REISCH HELGE A; LEEMING PETER; RAJE PRASAD S; TOPOTARGET UK LTD
摘要:The present invention pertains to the general field of chemical synthesis, and more particularly to methods for the synthesis of certain hydroxamic acid compounds, and in particular, (E)-N-hydroxy-3-(3-phenylsulfamoyl-phenyl)-acrylamide, also known as PXD101 and Belinostat®, comprising, for example, the steps of: (SAF) sulfonamide formation; (PUR C ) optional purification; (AAA) alkenyl-acid addition, comprising: either (i): the steps of, in order: (ACAEA) alkenyl-carboxylic acid ester addition; (PUR E ) optional purification; and (CAD) carboxylic acid deprotection; or (ii): the step of: (ACAA) alkenyl-carboxylic acid addition; (PUR F ) optional purification; (HAF) hydroxamic acid formation; and (PUR G ) optional purification.