Bis(2,2,2-trifluoroethyl) Carbonate as a Condensing Agent in One-Pot Parallel Synthesis of Unsymmetrical Aliphatic Ureas
摘要:
One-pot parallel synthesis of unsymmetrical aliphatic ureas was achieved with bis(2,2,2-trifluoroethyl) carbonate. The procedure worked well for both the monosubstituted and functionalized alkyl amines and required no special conditions (temperature control, order, or rate of addition). A library of 96 diverse ureas was easily synthesized.
A dual site catalyst for mild, selective nitrile reduction
作者:Zhiyao Lu、Travis J. Williams
DOI:10.1039/c3cc47384h
日期:——
We report a novel ruthenium bis(pyrazolyl)borate scaffold that enables cooperative reduction reactivity in which boron and ruthenium centers work in concert to effect selective nitrilereduction. The pre-catalyst compound [kappa(3)-(1-pz)2HB(N = CHCH3)]Ru(cymene)(+) TfO(-) (pz = pyrazolyl) was synthesized using readily-available materials through a straightforward route, thus making it an appealing
DUAL SITE CATALYST FOR MILD, SELECTIVE NITRILE REDUCTION
申请人:University of Southern California
公开号:US20160145193A1
公开(公告)日:2016-05-26
A ruthenium bis(pyrazolyl)borate scaffold that enables cooperative reduction reactivity in which boron and ruthenium centers work in concert to effect selective nitrile reduction is provided. The pre-catalyst compound [κ
3
-(1-pz)
2
HB(N═CHCH
3
)]Ru(cymene)
−
TfO
−
(pz=pyrazolyl) was synthesized using readily-available materials through a straightforward route, thus making it an appealing catalyst for a number of reactions.
Hydrosilane Reduction of Nitriles to Primary Amines by Cobalt–Isocyanide Catalysts
作者:Atsushi Sanagawa、Hideo Nagashima
DOI:10.1021/acs.orglett.8b03736
日期:2019.1.4
silylated primaryamines was achieved by combination of 1,1,3,3-tetramethyldisiloxane (TMDS) as the hydrosilane and a catalytic amount of Co(OPiv)2 (Piv = COtBu) associated with isocyanide ligands. The resulting silylated amines were subjected to acid hydrolysis or treatment with acid chlorides to give the corresponding primaryamines or imides in good yields. One-pot synthesis of primary amides to
通过将1,1,3,3-四甲基二硅氧烷(TMDS)作为氢化硅烷和催化量的与异氰配体缔合的Co(OPiv)2(Piv = CO t Bu)的组合,可以将腈还原为甲硅烷基化的伯胺。将所得的甲硅烷基化的胺进行酸水解或用酰氯处理,以高收率得到相应的伯胺或酰亚胺。铁-钴双催化剂体系也可以通过氢化硅烷将伯酰胺一锅合成伯胺。
Ruthenium complex based on [N,N,O] tridentate -2-ferrocenyl-2-thiazoline ligand for catalytic transfer hydrogenation
作者:J I Badillo-Gómez、E P Sánchez-Rodríguez、R A Toscano、M Gouygou、M C Ortega-Alfaro、J G López-Cortés
DOI:10.1016/j.jorganchem.2020.121630
日期:2021.1
Schiff base ligand L1 using the 2-Ferrocenyl-2-thiazoline as scaffold was developed. The 1,2-disubstituted ferrocene-based ligand was assembled using as key strategy the directed ortho-metalation (DoM) in 2-ferrocenyl-2-thiazoline. L1 was successfully obtained in 83% of overall yield after two-step synthesis. The coordination ability of L1 towards Ru(II) was evidenced and the resulting complex was characterized
开发了一种以2-二茂铁基-2-噻唑啉为骨架合成无膦的[N,N,O]-三齿席夫碱配体L1的新方法。使用2-铁茂铁基-2-噻唑啉中的定向邻位金属化(D o M)作为关键策略组装1,2-二取代的二茂铁基配体。两步合成后,L1以总收率的83%成功获得。证明了L1对Ru(II)的配位能力,并通过IR,UV-vis和EPR表征了所得的配合物。在各种底物的转移加氢中测试了其催化性能,得到了中等至优异的转化率。
Nicotinamide benzofused-heterocyclyl derivatives useful as selective inhibitors of pde4 isozymes
申请人:——
公开号:US20030186989A1
公开(公告)日:2003-10-02
Compounds useful as inhibitors of PDE4 in the treatment of diseases regulated by the activation and degranulation of eosinophils, especially asthma, chronic bronchitis, and chronic obstructive pulmonary disease, of Formula (1.0.0):
1
wherein R
5
and R
6
are taken together to form a moiety of partial Formulas (1.1.1) through (1.1.5):
2
or a pharmaceutically acceptable salt thereof.