2-Chloro-1,3-dimethylimidazolinium Chloride. 3. Utility for Chlorination, Oxidation, Reduction, and Rearrangement Reactions
摘要:
2-Chloro-1,3-dimethylimidazolinium chloride (1), which can act as a powerful dehydrating equivalent to DCC (2), is also applicable to chlorination, oxidation, reduction, and rearrangement under nearly neutral conditions. The utility of 1 for these reactions is described.
Dual-Ligand-Enabled Ir(III)-Catalyzed Enantioselective C–H Amidation for the Synthesis of Chiral Sulfoxides
作者:Wentan Liu、Wu Yang、Jiefeng Zhu、Yonghong Guo、Na Wang、Jie Ke、Peiyuan Yu、Chuan He
DOI:10.1021/acscatal.0c02109
日期:2020.7.2
wide range of dibenzyl sulfoxides and dioxazolones are compatible with this process, giving access to a variety of highly functionalized sulfoxide compounds with synthetically attractive amide substitution groups in good yields and enantioselectivities. Moreover, the flexible derivatization of the amidated sulfoxide was elaborated, providing various types of chiralsulfoxide scaffolds that would be
Lewis acid-assisted Ir(<scp>iii</scp>) reductive elimination enables construction of seven-membered-ring sulfoxides
作者:Wu Yang、Yingzi Li、Jiefeng Zhu、Wentan Liu、Jie Ke、Chuan He
DOI:10.1039/d0sc04180g
日期:——
bond formation appears to have fallen off significantly. The main problem lies in the reductive elimination step, as iridium has a tendency to form stable and catalytically inactive Ir(III) species. Herein, with a rationally designed Lewisacid assisted oxidatively induced strategy, the sluggish Ir(III) reductive elimination is successfully facilitated, enabling the facile C–C bond formation. The X-ray
Novel adducts of sulfides and 4-substituted 1,2,4-triazoline-3,5-diones ( TAD ) A similarity of TAD and singlet oxygen( 1O2 )
作者:Wataru Ando、Kenji Ito、Toshikazu Takata
DOI:10.1016/s0040-4039(00)87740-0
日期:——
The 4-substituted1,2,4-triazoline-3,5-diones( ) afford with sulfides( ) having acidic α-hydrogens the 1,4-disubstituted urazoles( ). Reactivity of the triazolinedione shows similarity in possible reaction modes with that of singlet oxygen.
A new series of Ni(II), Cu(II), Co(II) and Pd(II) complexes with an ONS donor Schiff base: Synthesis, crystal structure, catalytic properties and bioactivities
作者:Mukul Kalita、Prasanta Gogoi、Pranjit Barman、Bipul Sarma、Alok K. Buragohain、Ranjan D. Kalita
DOI:10.1016/j.poly.2014.02.043
日期:2014.5
new series of bichelated complexes of the formula M(L) 2 and M(L)Cl, where M = Ni(II), Cu(II), Co(II) and Pd(II) and L = a deprotonated Schiff base, were synthesized from the reaction of 5-bromo N-[(2-benzylthio)-phenyl] salicylaldimine (HL, 1 ), a new potential tridentate (O, N, S donor) Schiff base, with metalsalts in methanol medium, and the complexes were characterized by a variety of physicochemical
摘要一系列新的式M(L)2和M(L)Cl的双螯合物,其中M = Ni(II),Cu(II),Co(II)和Pd(II),L =去质子化的席夫碱是由5-溴N-[(2-苄硫基)-苯基]水杨醛亚胺(HL,1)(一种新的潜在三齿(O,N,S供体)席夫碱)与金属盐在甲醇介质中的反应合成的,并通过多种物理化学技术对复合物进行表征,即元素分析,FT-IR,1 H NMR和UV-Vis光谱,热重分析和电导率研究。通过单晶X射线衍射研究确定了钯配合物的配位模式,发现其具有扭曲的方形平面结构,配体通过羟基氧作为单负电荷的三齿螯合剂进行配位,甲亚胺氮和硫醚硫原子,其余的第四配位位点被氯离子填充。使用H 2 O 2作为氧化剂,铜络合物对有机硫醚氧化为相应的亚砜和砜具有非常好的催化活性。所述配体和复合物对肺炎克雷伯菌(ATCC 10536),金黄色葡萄球菌(ATCC 11632)和白色念珠菌具有相当大的抗菌和抗真菌活性。
PROCESS FOR PRODUCTION OF OPTICALLY ACTIVE SULFOXIDE COMPOUND USING IRON-SALAN COMPLEX CATALYST
申请人:Katsuki Tsutomu
公开号:US20100094037A1
公开(公告)日:2010-04-15
An optically active sulfoxide compound that is useful as an intermediate for synthesis or an active ingredient of a physiologically active substance such as a pharmaceutical agent is produced at a high optical purity. A process for producing an optically active sulfoxide compound of formula (4) comprises oxidizing a sulfide compound of formula (3) in the presence of an optically active metal complex of formula (1), (1′), (2) or (2′) by using an oxidizing agent. The present invention is also directed to the optically active metal complex.