N，N’-二[3-氯-5S-（l-孟氧基）-2（5H）-4-呋喃酮基]-1，4-丁二胺的合成及晶体结构

合成了N,N’-二[3-氯-5S-（l-孟氧基）-2（5H）-4-呋喃酮基]-1,4-丁二胺,并通过IR,^1H NMR,MS和X射线单晶衍射对其进行了表征．X射线单晶衍射结果表明：标题化合物的不对称结构单元中包含一个平面的呋喃酮环和一个椅式的环己烷环,四个手性中心．标题化合物通过N—H…O分子间氢键作用实现空间堆积．     

N,N'-二-[5-甲氧基-3-溴-2(5H)-4-呋喃酮基]-1,2-乙二胺的合成及其晶体结构(英文)

通过串联迈克尔加成-消除反应合成了N,N'-二-[5-甲氧基-3-溴-2(5H)-4-呋喃酮基]-1,2-乙二胺,利用IR、UV、1H NMR、13C NMR、MS、元素分析和X射线单晶衍射对其进行表征.X射线单晶衍射结果表明:标题化合物包含两个平面的呋喃酮环和两个手性中心,并通过N(1)-H(1A)…O(1)分子间氢键和Br(1)…O(2)近距离作用形成超分子结构.     

3-氯-4-二苄胺基-5-甲氧基-2(5H)-呋喃酮的合成与晶体结构

在THF溶液中合成了标题化合物3-氯-4-二苄胺基-5-甲氧基-2(5H)-呋喃酮,并用FT-IR、UV-Vis、1HNMR、13C NMR、MS、元素分析和X-射线衍射等进行了表征。结果表明此化合物属正交晶系,空间群为Pbca,晶胞参数为:a=15.891(16),b=11.126(11),c=19.778(19),α=β=γ=90°,V=3497(6)3,Z=8,Dc=1.306Mg/m3,μ=0.234 mm-1,F(000)=1440。在化合物的分子结构中,两个苯环几乎垂直于呋喃酮平面,且它们与呋喃酮平面的两面角分别为89.38°和88.19°。     

5-苯基-3,5-二乙氧基-2(5H)-呋喃酮的晶体结构

标题化合物C14H16O4的晶体结构用X-射线单晶衍射法测定。晶体属三斜晶系,P空间群,晶胞参数a =8.696(2), b=8.943(2) , c=9.379(2) ?, ( = 69.28(3), ( =76.67(3), ( =80.28(3)o, V=660.8(3) ? 3, Z=2, Mr=248.28, Dx=1.248 g/cm3, F(000)=264, μ(MoK()=0.0851 mm—1。晶体结构用直接法解出,经全矩阵最小二乘法对原子参数进行修正,最终的偏离因子为R=0.061, wR=0.089。标题化合物有2个环：呋喃酮环和苯环。由C(1),C(2),C(3),C(4),O(4)构成的五元呋喃酮环的5个原子较好地处于1个平面上,平均偏差为0.0078?。O(2),O(3) 两个原子与呋喃酮环共平面。呋喃酮环和苯环之间的两面角为79.39o。     

5-(S)-孟氧基-3,4-二卤-2(5H)-呋喃酮与4-硝基邻苯二胺的Michael加成―消除反应

在Et3N作为碱的温和条件下,5-(S)-孟氧基-3,4-二卤-2(5H)-呋喃酮与芳香胺4-硝基邻苯二胺发生串联的Michael加成―消除反应,生成了新的含有苯环结构的5-孟氧基-4-氨基-3-卤-2(5H)-呋喃酮类化合物。新化合物的结构通过紫外―可见光谱(UV-Vis)、红外光谱(IR)、质谱(MS)、核磁共振氢谱(1H NMR)、核磁共振碳谱(13C NMR)和元素分析等表征证实。该多环结构卤代2(5H)-呋喃酮化合物的合成,能为某些多官能团的结构复杂的2(5H)-呋喃酮化合物的合成提供新途径。     

螺[1-氯-4-l-孟氧基-5-氧杂-6-氧代双环[3·1·0]己烷-2,3'-(4'-吗啉基-5'-l-孟氧基丁内酯)]合丙酮的合成及晶体结构

利用新手性源,5-(l-孟氧基)-3-氯-2(5H)-呋喃酮4与亲核试剂吗啉通过串联不对称双Michael加成/分子内亲核取代反应合成了一般方法难以得到的含有多个手性中心的螺-环丙烷双内酯化合物C32H50O7NCl.其单晶为C32H50O7NCl(OC3H6)0.5,正交晶系, 空间群为P212121, 晶胞参数a = 17.149(3), b = 20.384(4), c = 10.831(2) , V = 3786.1(12) 3, Z = 4, Dc = 1.097 g/cm3, F(000) = 1352, μ= 0.144 mm-1; 射线类型为MoK?( = 0.71073 ?, 偏离因子R = 0.0755, wR = 0.1956, 独立衍射点3710个, 其中可观测点数2318个.分子中共有六个环, 12个手性中心, 3个六元环呈椅式构象, 两个五员内酯环呈信封式构象, 并分别与环丙烷形成[2.4]螺环和 [3.1.0] 稠环, 4个新生成的手性中心的绝对构型为C(3)(S), C(4)(S), C(5)(R), C(8)(R).     

5-甲氧基-3,4-二卤-2(5H)-呋喃酮与三丁基膦的反应

在研究5-甲氧基-3,4-二卤-2(5H)-呋喃酮的Heck反应过程中,意外发现了5-甲氧基-3,4-二卤-2(5H)-呋喃酮与配体三丁基膦的反应,得到两个新季鏻盐化合物,产物结构被IR、1H-NMR、ESI-MS测试结果所证实。     

含三唑结构2(5H)-呋喃酮衍生物的合成

研究5-烷氧-3,4-二溴-2(5H)-呋喃酮与末端炔烃、叠氮化钠的"一锅煮"反应,没有得到预期的稠杂环化合物,仅得到了5-烷氧-4-三唑基-3-溴2(5H)-呋喃酮,产物的结构用紫外―可见光谱(UV-Vis)、红外光谱(IR)、质谱(MS)、核磁共振氢谱(1H NMR)、核磁共振碳谱(13C NMR)和元素分析等表征和证实。该含1,2,3-三唑结构溴代2(5H)-呋喃酮化合物的意外合成,能为某些多官能团的、结构复杂的2(5H)-呋喃酮化合物的合成提供新途径。     

5-烷氧基-4-环胺基-3-卤-2(5H)-呋喃酮的合成与表征

在氟化钾作用下,亲核试剂环状仲胺与5-烷氧基-3,4二卤-2(5H)-呋喃酮在室温下发生串联的迈克尔加成-消除反应,合成了17个新化合物.通过旋光度,UV-Vis,IR,1H NMR,13C NMR,MS,元素分析和X射线单晶衍射等表征方法,确定了目标化合物的化学结构和绝对构型.     

N,N'-双(苯甲酰丙酮)-1,4-丁二胺席夫碱银(I)配合物的合成及其晶体结构

以苯甲酰丙酮与1,4-丁二胺经缩合反应制得一个新的席夫碱配体——N,N'-双(苯甲酰丙酮)-1,4-丁二胺(L);L与硝酸银经配位反应合成了配合物[Ag_2(L)(NO_3)_2]_n(1),其结构经1H NMR,13C NMR,FT-IR,元素分析和X-射线单晶衍射表征。晶体结构解析表明:1(CCDC∶1 434 692)属单斜晶系,空间群P21/c,晶胞参数a=0.997 81(5)nm,b=0.778 36(4)nm,c=1.704 13(8)nm,β=106.637 0(10),V=1.261 85(11)nm3,Z=2,Dc=1.884 g·cm~(-3),R1=0.020 8,wR_2=0.054 4。1中每个银离子为扭曲四面体的配位构型,分别和相邻配体的γ-碳原子,氧原子及两个NO_3~-的氧原子配位;每个配体作为四齿配体,分别用两端的γ-碳原子,氧原子和四个银离子配位形成1D链结构,1D通过NO_3~-与银离子配位扩展形成3D网状结构。热稳定性研究结果表明:L和1的初始分解温度分别为300℃和200℃。     

Synthesis and Crystal Structure of N,N′-Bis-[3-chloro-5-S-(l-menthyloxy)-2(5H)-4-furanon-yl]-propane-1,3-diamine

The title compound,N,N′-bis-[3-chloro-5-S-(l-menthyloxy)-2(5H)-4-furanon-yl]-propane-1,3-diamine(C31H48Cl2N2O6,Mr = 615.61),has been synthesized and characterized by IR,1H NMR,MS,elemental analysis and single-crystal X-ray diffraction.The crystal crystallizes in the monoclinic system,space group C2 with a = 16.1091(4),b = 11.1880(3),c = 19.2854(5) ,β = 106.297(2)°,V = 3336.12(15) 3,Z = 4,Dc = 1.226 mg/m3,μ = 0.237 mm-1,F(000) = 1320,the final R = 0.0531 and wR = 0.0700 for 2760 observed reflections(I > 2σ(I)).X-ray analysis reveals that the title compound possesses four rings:two chiral five-membered furanone rings and two six-membered cyclohexane rings with chair conformation,containing eight chiral centers:C2(S),C3(R),C5(R),C10(S),C18(S),C21(R),C22(S) and C25(R).The structure is stabilized by N-H…O hydrogen bonding interaction.     

A highly enantioselective synthesis of 5-(l-menthyloxy )-4-substituted-3-chloro-2(5H )-furanones

In this paper, stereocontrolled tandem Michael addition-elimination reaction of the novel chiral source, 5-(l-menthyloxy)-3,4-dichloro-2(5H)-furanone, with various thiols and amines has been investigated. A series of new enantiomerically pure compounds, 5–(l-menthyloxy)-4-substituted-3-chloro-2(5H)-furanones, were obtained in good yields with d. e. ? 98% under mild conditions.     

Crystal Structure of 5-(l-Menthyloxy)-3-Bromo-4-(R)-(+)-Methylbenzylamino-2(5H)-Furanone

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Synthesis, Crystal Structure and Antibacterial Activities of 3-[（2-Hydroxy-4-diethylamino-phenyl）methylenehydrazinocarbonyl]-4-hydroxy-6-methyl-2（1H）-pyridinones

1 INTRODUCTION Recently, compounds containing pyrazole, imida- zole, triazole (including benzotriazole), pyridine, tetrazole and indole have attracted much interest because of their fungicidal activity, plant-growth regulating activity and antibacterial activity[1～3]. Schiff bases also constitute a good type of biolo- gically active substructures[4～7]. Studies of pyri- dine Schiff base-type fungicides have been repor- ted[8]. However, some structures of pyridine com- pounds containing h…     

Synthesis, Crystal Structure and Antibacterial Activities of 3-[3-Methyl-（2-thienyl）methyl-enehydrazinocarbonyl]-（1H）-1,2,4-triazole

1 INTRODUCTION Azole derivatives, such as the derivatives of pyra- zole, imidazole, triazole including benzotriazole, te- trazole and indole, have extensive biological activi- ties. They have become the central focus of studies of agricultural chemicals, medicines, plant growth regulating agents and so on[1, 2]. Schiff bases also constitute a good type of biologically active sub- structures. Studies on pyrazole Schiff base-type fun- gicides have been reported[3, 4]. However, some struc- …     

Synthesis and Crystal Structure of 3-（ 2- Hydroxybenzly ）-4-（ 4- Hydro xybenzylideneamino ）-（1H） - 1,2,4- Triazole-5-Thione and Its Antibacterial Activities

1 INTRODUCTION 2. 1 Physical measurements Azole derivatives, such as pyrazole, imidazole, All solvent and chemicals were commercial rea- triazole(including benzotriazole), tetrazole and indole, gents and used without further purification. Ele- have extensive biological activities. They have be- mental analyses were performed on a PE 1700 CHN come the central focus of studies for agricultural che- auto elemental analyzer. IR spectra were recorded on micals, medicines, plant growth regul…