[EN] NOVEL PHOSPHOROUS (V)-BASED REAGENTS, PROCESSES FOR THE PREPARATION THEREOF, AND THEIR USE IN MAKING STEREO-DEFINED ORGANOPHOSHOROUS (V) COMPOUNDS<br/>[FR] NOUVEAUX RÉACTIFS À BASE DE PHOSPHORE (V), LEURS PROCÉDÉS DE PRÉPARATION ET LEUR UTILISATION DANS LA FABRICATION DE COMPOSÉS ORGANOPHOSHOREUX (V) STÉRÉODÉFINIS
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2019200273A1
公开(公告)日:2019-10-17
The present invention relates to novel phosphorous (V) (P(V)) reagents, methods for preparing thereof, and methods for preparing organophosphorous (V) compounds by using the novel reagents.
Synthesis of Alkenyl Boronates from Epoxides with Di-[B(pin)]-methane via Pd-Catalyzed Dehydroboration
作者:Stephanie A. Murray、Eugenia C. M. Luc、Simon J. Meek
DOI:10.1021/acs.orglett.7b03853
日期:2018.1.19
A practical and broadly applicable catalytic method for the synthesis of (E)-alkenylborons is presented. Reactions are promoted by [Pd(Cl)(η3-C3H5)]2 and proceed by the dehydroboration of cyclic borates. Through the use of epoxides and readily available di-B(pin)-methane (pin = pinacolato), a range of allylic alcohol-containing alkenyl boronates, including those that contain a tertiary alcohol, may
提出了一种实用且广泛适用的合成(E)-烯基硼的催化方法。反应通过促进[加入Pd(Cl)的(η 3 -C 3 H ^ 5)] 2和由环状硼酸盐的dehydroboration进行。通过使用环氧化物和现成的二-B(pin)-甲烷(pin =频哪醇),可以制备一系列含烯丙基醇的烯基硼酸酯,包括那些含有叔醇的硼酸烯基硼酸酯,其收率可达75%。 > 20:1 é / ž。
One-Pot Synthesis of<i>N</i>-<i>tert</i>-Butylsulfinylimines and Homoallylamine Derivatives from Epoxides
作者:Alejandro Lahosa、Francisco Foubelo、Miguel Yus
DOI:10.1002/ejoc.201600612
日期:2016.8
The reaction of epoxides with tert-butanesulfinamide in the presence of a Lewis acid, such as erbium triflate or boron trifluoride–diethyl ether, in THF as solvent, under microwave or thermal activation, produces N-tert-butylsulfinylimines in reasonable yields. Aromatic and gem-disubstituted and trisubstituted alkyl epoxides performed better than mono-alkyl-substituted compounds. After imine formation
Performance of chiral tetracarbonylmolybdenum pyrindanyl amine complexes in catalytic olefin epoxidation
作者:Patrícia Neves、Lucie S. Nogueira、Anabela A. Valente、Martyn Pillinger、Isabel S. Gonçalves、Ivo E. Sampaio-Dias、Carlos A.D. Sousa、Fabio Rizzo-Aguiar、José E. Rodríguez-Borges
DOI:10.1016/j.jorganchem.2018.01.003
日期:2018.3
Tetracarbonylmolybdenum(0) complexes of the type cis-[Mo(CO)4(L)] containing chiral 7-(1-pyrindanyl) amine ligands were prepared and found to be effective precatalysts for the epoxidation of achiral (cis-cyclooctene) and prochiral (DL-limonene and trans-β-methylstyrene) olefins at 55 °C. Epoxides were the only products formed from cis-cyclooctene (100% yield) and trans-β-methylstyrene (100% selectivity
制备了含有手性7-(1-吡喃基)胺配体的顺式-[Mo(CO)4(L)]型四羰基钼(0)配合物,发现该化合物是有效的手性环氧化物(顺式-环辛烯)和55°C下的前手性(DL-柠檬烯和反式-β-甲基苯乙烯)烯烃。环氧化合物是唯一由顺式-环辛烯(100%收率)和反式-β-甲基苯乙烯(82-85%转化率的100%选择性)形成的产物,而主要产物是由DL-柠檬烯(80-82%1,2 -在85%转化率下的环氧选择性)。回收催化剂的表征表明,预催化剂是原位转化的到含有β-辛钼酸根阴离子[ β- Mo 8 O 26 ] 4-的稳定的多氧钼酸盐,它负责催化反应。
Tungstenocene-grafted silica catalysts for the selective epoxidation of alkenes
evenly dispersed larger monoclinic tungsten(VI) oxide aggregates, for the catalyst prepared via dry impregnation, respectively. Both W/SiO2 solids showed moderate to good conversion values in the epoxidation of (R)-(+)-limonene and methyl oleate (up to 68%), in the presence of aqueous hydrogen peroxide, with good selectivity to the desired epoxides (63% and 78%, respectively). The heterogeneous character