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The title compound 4-(2-bromophenyl)-3,4,7,8-tetrahydro-7,7-dimethyl-1-p-tolylquinoline-2,5(1H,6H)-dione 1 (C24H24BrNO2, Mr = 438.35) was synthesized and characterized by IR, 1H NMR and elemental analysis. The crystal belongs to monoclinic, space group C2/c with a = 27.565(14), b = 10.079(5), c = 15.917(8) A,β = 111.059(9)°, Z = 8, V = 4127(4)A3, Dc = 1.411 g·cm^-3,μ(MoKa) = 2.011 mm^-1, F(000) = 1808, the final R = 0.0417 and wR = 0.1032 for 2393 observed reflections (I 〉 2σ(I)). X-ray analysis reveals that the pyridine ring adopts a distorted boat conformation, while another six-membered ring takes a half-chair conformation. In addition, there are non-classical hydrogen bonds of C-H…O and C-H…Br in the structure. The short distance (3.481A) between the adjacent 2-bromophenyl rings indicates the existence of π-π interaction. 相似文献
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A series of 2-aminochromene derivatives including 2-amino-ben-zo[ h ] chromene, 2-amino-benzo [ f ] chromene and 2-amino-pyrano [3,2-h ]quinolin derivatives was synthesized from aryl-aldehyde, malononitrile or ethyl cyanoacetate and 1-naphthol or 2-naphthoi or 8-hydroxyquinoline in refluxing ethyl alcohol cat-alyzed by KF-Al2O3. The structures were confirmed by X-ray analysis. 相似文献
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标题化合物2,2,7,7-四甲基-5,6-二氧代-9-(2-氯苯基)-10-(4-甲基苯基)-9,10-二氢-2H-吖啶(C30H32ClNO2,Mr=474.02)是由邻氯苯甲醛和5,5-二甲基-1,3-环己二酮和对甲基苯胺以乙二醇作溶剂在微波辐射下而得到的。结构通过单晶X-射线衍射分析确定,其晶体属于单斜晶系,空间群P21/c,a=12.048(3),b=11.044(2),c=19.989(5)?b=101.42(2),Z=4,V=2607(1)3,Dc=1.208g/cm3,m(MoKa)=0.173mm-1,F(000)=1008,R=0.0450,wR=0.0869。X-射线衍射分析表明:原子C(8),C(13),C(14),C(15),C(20)和N形成1个六员环,采用船式构象,六员环C(8)~C(13)和C(15)~C(20)采用半椅式构象。 相似文献
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屠树江   朱晓彤   房芳   章晓镜   朱松磊   李团结   史达清 王香善   纪顺俊 《中国化学》2005,23(5):596-598
A simple effective synthesis of bis(dihydropyrimidinone-4-yl)benzene derivatives, using boric acid as catalyst,from isophthalic aldehyde or terephthalic aldehyde, 1,3-dicarbonyl compounds and urea or thiourea in glacial acetic acid was described. As the expansion of the classical Biginelli reaction, this method has the advantage of excellent yields 83%-94% and short reaction time 0.5-1.5 h. 相似文献
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1 INTRODUCTION 2-Aminochromene is an important class of compounds as the main compounds of many natu- rally occurring products which can be used as cos- metics and pigments[1] and potential biodegradable agrochemicals[2~4]. Inorganic solid supports as c… 相似文献
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