1,7,7-三甲基双环[2.2.1]庚基羟烷基醚的合成

酸催化莰烯与二醇的羟烷氧基化反应是合成标题化合物的可行路线。前人所用酸性催化剂有离子交换树脂及路易斯酸 BF_3·Et_2O。松原义治等报道用离子交换树脂催化茨烯或三环烯分别与乙二醇、1,2-丙二醇反应获得相应的醚,醚化产率分别为42%、33%。Fujioka,Futoshi 等以 BF_3·Et_2O 为催化剂,使莰烯与1,3-丁二醇反应获得产率为34%的醚。迄     

1,7,7-三甲基双环[2.2.1]庚基环烷基(或环取代的烷基)醚的合成

本文报道以缺铝氢型丝光沸石催化莰烯或三环烯与几种环醇, 如环戊醇、环乙醇、四氢糖醇、苯甲醇、苯乙醇、2-甲基苯乙醇等烷氧基化反应的结果。     

1,7,7—三甲基双环[2,2,1]庚基环烷基(或环己基烷基)醚的合成

本文报道以缺铝氢型丝光沸石催化烯或三环烯与六种含环醇的烷氧基化反应,以较高产率生成1,7,7—三甲基双环(2,2,1)庚基环烷基醚(或苯基烷基醚)。同时生成少量的(6,7,7—三甲基双环(2,2,1)庚基环烷基醚(或苯基烷基醚)副产物。含苯环产物通过Raney镍催化剂加氢也可得到标题化合物。     

1-(3,5-二甲基苯基)-1-[(1S,4S)-1,7,7-三甲基双环[2.2.1]庚烷-2-基]肼的合成工艺改进

以3,5-二甲基苯胺和2-莰酮为起始原料,在微波促进下,经缩合反应制得N-(3,5-二甲基苯基)-1-(1S,4S)-1,7,7-三甲基二环[2.2.1]庚烷-2-亚胺(1);1经硼氢化钠还原后再与羟胺-O-磺酸经胺化反应合成了1-(3,5-二甲基苯基)-1-[(1S,4S)-1,7,7-三甲基双环[2.2.1]庚烷-2-基]肼,总收率70.4%,其结构经1H NMR和ESI-MS确证。     

2-(3,3-二甲基双环[2.2.1]庚-2-亚基)乙醛肟的合成

以ω-甲酰基莰烯为主原料,与盐酸羟胺、三水合乙酸钠经亲核加成反应,合成目标化合物2-(3,3-二甲基双环[2. 2. 1]庚-2-亚基)乙醛肟。采用FT-IR、GC-MS、1H NMR和13C NMR等手段对产物进行了表征,确定了产物结构。探讨了溶剂及碱的种类、碱的用量、物料比、反应温度以及反应时间对原料转化率、产物选择性和产率的影响,得到了适宜的工艺条件为:碱为三水合乙酸钠,n(ω-甲酰基莰烯)∶n(盐酸羟胺)∶n(三水合乙酸钠)=1. 0∶1. 2∶2. 0,溶剂为20 m L的75%乙醇,反应温度为70℃,反应时间为2. 5 h。在上述条件下,产物的产率为83. 9%。     

5,6-环氧双环[2.2.1]庚烷-2-羧酸5,6-环氧双环[2.2.1]庚烷-2-甲酯及其3-甲基衍生物的合成

绝大部份商品环氧树脂皆由双酚与环氧氯丙烷缩合而得,其最明显的缺点是粘度较大和耐温性能较差。近年来,在国外有不少报告,某些环氧化多烯可以避免这些缺点。但关于含双环[2.2.1]庚烷环的环氧化物则很少研究。本文报告有关这类环氧化物的合成及其固化的研究结果。作者按下列方式合成含双环[2.2.1]庚烷环的双环氧化物:     

2-溴甲基取代的[1,3]二氧戊环并[4,5-g]喹啉-7-甲酸乙酯的合成(英文)

6-甲基-[1,3]二氧戊环并[4,5-g]喹啉-7-甲酸乙酯(1)与N-溴代丁二酰亚胺(NBS)在150W白炽灯照射的条件下有效的发生自由基溴化反应,以较好的收率(75%)得到想要的单溴化产品6-(溴甲基)-[1,3]二氧戊环并[4,5-g]喹啉-7-甲酸乙酯(2)。本文所开发的自由基溴化方法与文献相比,单溴化产品的收率提高了46%。另外,该溴化反应中所生成的少量副产品也进行了分离提纯,其结构经波谱分析证实为9-溴-6-甲基-[1,3]二氧戊环并[4,5-g]喹啉-7-甲酸乙酯(3)。     

外式双环[2.2.1]庚烷(庚-5-烯)-2,3-二甲酸酐膦二肽衍生物的合成

选择有机磷基团对斑蝥素的结构骨架进行修饰改造,以外式双环[2.2.1]庚-5-烯-2,3-二甲酸酐为原料,设计合成了一系列斑蝥素类似物。化合物的结构经1HNMR,MS及元素分析确证。     

内-α-取代-α-甲基双环[2.2.1]-5-庚烯-2-基甲醇的合成及香气

许多降冰片烷衍生物可以作为食品或化妆品香精中的香原料,如珍贵的天然檀香油中的主要成份β-檀香醇(?)近年来又有许多其它作为香原料的降冰片烷衍生物的报道,例如具有如下通式的化合物     

乙腈(丙酮)α-C嵌入合成2-取代环戊烯并[c]色烯衍生物

报道了氧联1,7-烯炔与乙腈、丙酮通过α-C嵌入方式合成2-取代环戊烯并[c]色烯衍生物.本反应具有底物范围广、基团兼容性好及产率良好等优点.研究表明这是一个自由基反应过程,也是构建含氧杂环一个有效的方法.产物2-氰基-3a,8-二甲基-1-对氟苯基-2,3,3a,4-四氢环戊烯并[c]色烯(3am)的晶体衍射分析进一...     

Syntheses and properties of enantiomerically pure higher (n > or = 7) [n-2]triangulanedimethanols and sigma-[n]helicenes

(P)-(+)-Hexaspiro[2.0.0.0. 0.0.2.1.1.1.1.1]pentadecane [(P)-17] as well as (M)-(-)- and (P)-(+)-octaspiro[2.0.0.0.0.0.0.0.2.1.1.1.1.1.1.1]nonadecanes [(M)- and (P)-25]-enantiomerically pure unbranched [7]- and [9]triangulanes-have been prepared starting from racemic THP-protected (methylenecyclopropyl)methanol 6. The relative configurations of all important intermediates as well as the absolute configurations of the key intermediates were established by X-ray crystal structure analyses. This new convergent approach to enantiomerically pure linear [n]triangulanes for n=7, 9 was also tested in two variants towards [15]triangulane. Some of the most prominent and unexpected features of the newly prepared compounds are the remarkable modes of self-assembly of the diols (P)-14, (E)-(3S,3'S,4S,4'S,5R,5'R)-21, (P)-(+)-22, and (E)-31 in the solid state through frameworks of intermolecular hydrogen bonds leading to, depending on the respective structure, nanotube- [(P)-14, (P)-(+)-22, and (E)-31], honeycomb-like structures [(E)-(3S,3'S,4S,4'S,5R,5'R)-21] or a supramolecular double helix [(P)-(+)- and (M)-(-)-22]. Liquid crystalline properties of the esters and ethers of the diols (P)-14, (P)-, and (M)-22 have also been tested. Although all of these [n]triangulanes have no chromophore which would lead to significant absorptions above 200 nm, they exhibit surprisingly high specific rotations even at 589 nm with [alpha](20)(D)=+672.9 (c=0.814 in CHCl(3)) for (P)-(+)-17, +909.9 (c=0.96 in CHCl(3)) for (P)-(+)-25, -890.5 (c=1.01 in CHCl(3)) for (M)-(-)-25, and -1302.5 (c=0.36 in CHCl(3)) for (M)-(-)-39, and the specific rotations increase drastically on going to shorter wavelengths. This outstanding rotatory power is in line with their rather rigid helical arrangement of sigma bonds, and accordingly these helically shaped unbranched [n]triangulanes may be termed "sigma-[n]helicenes", as they represent the sigma-bond analogues of the aromatic pi-[n]helicenes. Density functional theory (DFT) computations at the B3 LYP/6-31+G(d,p) level of theory for the geometry optimization and time-dependent DFT for determining optical rotations with a triplet-zeta basis set (B3 LYP/TZVP) reproduce the optical rotatory dispersions (ORD) very well for the lower members (n=4, 5) of the sigma-[n]helicenes. For the higher ones (n=7, 9, 15) the computed specific rotations turn out increasingly larger than the experimental values. The remarkable increase of the specific rotation with an increasing number of three-membered rings is proportional neither to the molecular weight nor to the number of cyclopropane rings in these sigma-[n]helicenes.     

Na2[ZnⅡ(ida)2]7H20和Na4[HgⅡ(nta)2]7H20的合成及结构测定

金属离子ZnⅠ和HgⅠ分别是生物体必需的微量元素和对人体有害的毒性金属.如何有效地摄取ZnⅠ和排除HgⅠ一直是化学家感兴趣的研究课题.而ZnⅠ和HgⅠ能与各种氨基酸形成配合物,由于它们处于同一族,电子结构都是dl0,故其配位结构只取决于金属离子半径的大小和配体的形状[1～3].     

某些内-双环[2.2.2]辛烯(或辛烷)基-2-甲醛缩醛的合成及香气

某些缩醛的香气比其母体醛优雅,且性质稳定,成为近年来调香中使用的一类新化合物。因此,我们继合成了一系列双环[2.2.2]辛     

Syntheses and Olfactory Characters of Some Endo-α-Substituted-Bicyclo[2. 2. 2]-Octenyl (or Octanyl) Methanols

Sixteen title compounds were synthesized, twelve of which are new ones. Their structures were determined by 1H NMR, IR and MS, the refractive indices or melting points were measured. Odors of all the title compounds were evaluated and the structure-odor relationship was briefly discussed.     

桥连双-(三氮杂环壬烷)化合物的合成

利用无水碳酸钾作缩合剂,在精制乙腈中使N,N'-二对甲苯磺酰基-1,4,7-三氮杂环壬烷3与双溴甲基化合物4a-4c缩合得到N-对甲苯磺酰基取代的桥连双-(三氮杂环壬烷)5a-5c,经浓硫酸脱去氮原子上的保护基团得到桥连双-(三氮杂环壬烷)6a-6c。化合物5a-5c和6a-6c均经元素分析、IR、^1HNMR、^1^3CNMR、MS等测试手段证实其结构和组成。     

Syntheses of 2-oxabicyclo[4.10.0]hexadec-1(6)-ene from cyclododecanone

Two methods for the synthesis of 2-oxabicyclo[4.10.0]hexadec-1(6)-ene from cyclododecanone have been suggested. The most convenient method involves the preparation of 2-(3-tert-butoxypropyl)cyclododecanone by phase-transfer catalyzed alkylation of cyclododecanone with l-bromo-3-tert-butoxypropane followed by removal of the protectingtert-butyl group and elimination of water.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 659–661, April, 1994.     

Syntheses of 7H-pyrido-and 7H-pyrano[2,3,4-kl]acridin-2(3H)-ones from 9-chloroacridines

A method for peri-annulation of the pyridine or pyran ring to acridine was developed and used to obtain 7H-pyrido-and 7H-pyrano[2,3,4-kl]acridin-2(3H)-ones. The peri-groups were formed by a reaction of 9-chloro-1-nitroacridine with a CH-acid (malononitrile, ethyl cyanoacetate, and ethyl malonate) followed by reduction of the nitro group, or by a reaction of 1-amino-10-methylacridone with PCl₅ and then with a CH-acid. Replacement of the chlorine atom in 9-chloro-1-methoxyacridines by the residue of the CH-acid with subsequent heating in an acidic medium afforded 7H-pyrano[2,3,4-kl]acridin-2(3H)-ones, which belong to a novel heterocyclic system. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1605–1610, September, 2006.