Cycloaddition of furfurylamines to maleic anhydride and its substituted derivatives
作者:V. P. Zaytsev、N. M. Mikhailova、I. K. Airiyan、E. V. Galkina、V. D. Golubev、E. V. Nikitina、F. I. Zubkov、A. V. Varlamov
DOI:10.1007/s10593-012-1023-1
日期:2012.6
The regio- and stereoselectivity of the [4 + 2] cycloaddition of maleic, citraconic, dichloromaleic, and dibromomaleic anhydrides to difurfuryl amines and secondary furfurylamines were studied. N-Furfuryl-, N-phenyl-, and N-benzylhexahydrooxoepoxyisoindole-7-carboxylic acids were synthesized. An approach was developed for obtaining hexahydroepoxyoxoisoindole-7-carboxylic acid unsubstituted at the nitrogen
Intra-molecular Diels–Alder reactions of citraconamic acids from furfurylamines and citraconic anhydride: effects of substitution in the furan ring on regioselectivity
作者:Rajappa Murali、H Surya Prakash Rao、Hans W Scheeren
DOI:10.1016/s0040-4020(01)00175-2
日期:2001.4
Regioselectivity in the intra-molecular Diels–Alder (IMDA) reaction of furfurylcitraconamic acids derived from N-benzylfurfurylamines and citraconic anhydride can be controlled by substituents located in the furan ring and by reaction conditions. Reactions conducted under kinetic conditions resulted in cycloaddition products having methyl and aminomethylene substituent in 1,3-relationship whereas under
Synthesis and solid state structures of two new copper(II) complexes of Schiff bases derived from furfuryl and tetrahydrofurfurylamine
作者:W. Chen、P. Miao、Y. G. Li、H. L. Zhu、Q. F. Zeng
DOI:10.1134/s1070328410120110
日期:2010.12
Two Schiff base copper(II) complexes, bis(N-furfurylsalicylaldiminato)copper(II) (I) and bis(N-tetrahydrofurfurylsalicylaldiminato)copper(II) (II), were synthesized and their solid state structures were determined by X-ray crystallography. Complex I has a squareplanar geometry. In contrast, complex II displays a distorted squareplanar geometry. Thus, the geometry around copper in the solid state
Hg2+, Ba2+, Cd2+, Ag+, Zn2+, Cu2+, Ni2+, Co2+, K+, Sr2+, and Na+) has been studied by UV–Vis and fluorescence spectroscopy. The compound showed highly selective fluorescence signaling behaviour for Zn2+ ions in methanol-water medium based on CHEF process and is capable of distinguishing Zn2+ from Cd2+ ion. From single crystal X-ray analysis it is revealed that a Zn2+ ion binds two ligand molecules through
N-糠基水杨醛亚胺(HL)对各种阳离子(Pb 2+、Hg 2+、Ba 2+、Cd 2+、Ag +、Zn 2+、Cu 2+、Ni 2+、Co 2+、K )的识别能力+、Sr 2+和 Na + ) 已通过 UV-Vis 和荧光光谱进行了研究。该化合物基于 CHEF 工艺对甲醇-水介质中的Zn 2+离子表现出高度选择性的荧光信号行为,并且能够区分 Zn 2+和 Cd 2+离子。从单晶X射线分析表明,Zn 2+离子通过亚胺氮和酚氧原子结合两个配体分子。 N- Furfurylsalicylaldimine通过 CHEF 过程选择性检测 Zn 2+离子。受体-Zn(II) 复合物的 X 射线结构显示 2:1 的化学计量比
Study of ligand isomeric complexes of N-furfurylsalicylaldimine
作者:Urmila A. Bhagwat、Vasudha A. Mukhedkar、Anant J. Mukhedkar
DOI:10.1039/dt9800002319
日期:——
isomeric form. The 1H n.m.r. spectra of both the isomers of the cobalt(III) complexes indicated a trans configuration. An electric polarization study of nickel(II) complexes also suggested that both isomericcomplexes had the trans configuration and that they were linkage isomers containing ligand isomers A and B. The participation of the furan oxygen in co-ordination was indicated in the A isomeric
合成了N-糠基水杨醛亚胺与Co III,Ni II Cu II和Pd II的配体异构体配合物(OC 4 H 3 CH 2 N CHPhOH,A和OC 4 H 3 CH NCH 2 PhOH,B)。异构现象的性质由偶氮甲碱基团,C N基团频率和电极化的1 H nmr光谱数据表征。与V IV O,Cr III,Mn II,Fe III,Pt II,Be的配合物II和Zn II以A异构形式获得。钴(III)配合物的两种异构体的1 H nmr光谱表明是反式构型。镍(II)配合物的电极化研究还表明,两种异构体均具有反式构型,并且它们都是包含配体异构体A和B的键合异构体。呋喃氧以配体形式参与了配位反应。与Pd II和Zn II的配合物。紫外光谱补充了异构体的表征。