[EN] A PROCESS FOR THE PREPARATION OF SOFOSBUVIR INTERMEDIATES & ITS POLYMORPH<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION D'INTERMÉDIAIRES SOFOSBUVIR ET LEUR FORME POLYMORPHE
申请人:LUPIN LTD
公开号:WO2016181313A1
公开(公告)日:2016-11-17
The present invention provides a novel process for preparation N-[(2,3,4,5,6- Pentafluorophenoxy)phenoxyphosphinyl]-L-alanine 1-methylethyl ester (formula 2) and resolving the formula 2 in the presence base to form N-[(S)-(2,3,4,5,6- Pentafluorophenoxy)phenoxyphosphinyl]-L-alanine 1-methylethyl ester (formula 2').
Acid-catalyzed polyfluoroarylation of arenes with polyfluorinated mono- and tris(phenoxy)-1-oxaspiro[2.5]octa-4,7-dienes
作者:V. N. Kovtonyuk、L. S. Kobrina
DOI:10.1007/s11172-011-0307-4
日期:2011.10
4,5,6,7,8-Pentafluoro-6-pentafluorophenoxy-1-oxaspiro[2.5]octa-4,7-diene and 4,6,8-trifluoro-5,6,7-tris(pentafluorophenoxy)-1-oxaspiro[2.5]octa-4,7-diene react with electron-rich arenes in the presence of AlCl3 or H2SO4 to give polyfluorinated phenoxybiaryls.
Synthesis of Molybdenum Imido 2-Adamantylidene Complexes through α Hydrogen Abstraction
作者:Jordan W. Taylor、Richard R. Schrock、Charlene Tsay
DOI:10.1021/acs.organomet.0c00244
日期:2020.6.22
Mo(NAr)(Adene)(OTf)2(DME) (1, Adene = 2-adamantylidene) was prepared upon addition of triflic acid. Methods analogous to those that have been successful for synthesizing neopentylidene and neophylidene complexes were used to form Mo(NAr)(Adene)(OMes)2 (2; Mes = 2,4,6-trimethylphenyl), [Mo(NAr)(Adene)(OC6F5)2]2 (3), Mo(NAr)(Adene)(OC6F5)2(MeCN) (4), Mo(NAr)(Adene)(Cl)2(bipy) (5; bipy = 2,2′-bipyridine), M
将在乙醚中的2-金刚烷基MgBr加到Mo(NAr)2(Cl)2(DME)(Ar = 2,6- i -Pr 2 C 6 H 3)中,得到Mo(NAr)2(2-Ad)2( 2-Ad = 2-金刚烷基,DME = 1,2-二甲氧基乙烷),通过加入三氟甲磺酸制备了Mo(NAr)(Adene)(OTf)2(DME)(1,Adene = 2-金刚烷)。使用类似于已成功合成新亚戊二烯和新戊二烯配合物的方法形成Mo(NAr)(Adene)(OMes)2(2 ; Mes = 2,4,6-三甲基苯基),[Mo(NAr)(Adene )(OC 6 F 5)2 ] 2(3),Mo(NAr)(Adene)(OC 6 F 5)2(MeCN)(4),Mo(NAr)(Adene)(Cl)2(bipy)(5 ; bipy = 2,2 ′-联吡啶),Mo(NAr)(Adene)(Cl)(OHMT)(6 ; OHMT = O-2
Nucleophilic Addition to the η<sup>2</sup>-Alkyne Ligand in [CpFe(CO)<sub>2</sub>(η<sup>2</sup>-R−C⋮C−R)]<sup>+</sup>. Dependence of the Alkenyl Product Stereochemistry on the Basicity of the Nucleophile
acyl intermediates formed by initial nucleophilicaddition of basic nucleophiles at the CO ligand, (2) trans-alkenyl complexes 4 result from addition of less basic nucleophiles to the η2-alkyne ligand from the exo-side, and (3) the equilibrium of the CO addition governed by the basicity of the nucleophile is the key step of the diversity of the stereochemistry of the alkenyl products. Reactions of
阳离子η的反应2 -alkyne铁络合物,[FP(η 2 -Ph-C⋮CPH)] BF 4(1)[Fp的=(η 5 -C 5 H ^ 5)的Fe(CO)2 ],各种O-,N-和C-亲核试剂提供了包含Ph-C C-Ph键的产物。即,顺式- (3)和反式-烯基配合物(4),FP-C(PH)C(Ph) -组成女,和metallacycles中,CP(CO)的Fe-C(PH)C(PH)-C(Ô )-Nu [在O(5)或Nu(6)]。的C的构造的晶体学测定用C部分3点4的产物分布的和分析表明,基本亲核试剂轴承烷基取代基产生的顺式烯基配合物(3)和/或所述metallacycles(5,6),而碱性较弱的带有芳基取代基的亲核试剂提供了反式-烯基配合物(4)。亲核试剂的产物分布与p K b值之间的相关性得出以下结论:(1)产物3,5,和6从由初始的亲核加成基本亲核试剂在CO的配体形成的酰基中间体出现,(
Formation of Fluorinated 1-Oxaspiro[2.5]octa-4,7-dienes from Polyfluorinated Cyclohexa-2,5-dienones with Diazomethane and Reactions with Aryl and2-Chloroethyl Isocyanates
作者:Vladimir N. Kovtonyuk、Ljubov S. Kobrina、Olga M. Kataeva,、Günter Haufe
DOI:10.1002/ejoc.200400559
日期:2005.3
The reactions of four polyfluorinatedcyclohexa-2,5-dienones 1a–1d, additionally substituted with an electron withdrawing substituent at the 4-position, with diazomethane give mixtures of two diastereomeric fluorinated1-oxaspiro[2.5]octa-4,7-dienes 2 and 3. Compounds 2a/3a and 2b/3b react with aryl and 2-chloroethyl isocyanates in the presence of lithium chloride or sodium pentafluorophenoxide to