CAS: 14174-09-5; Dibenzo-24-Crown-8

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CAS号120-80-9 邻苯二酚 | CAS号112-26-5 1,2-二(2-氯乙氧基)乙烷 | CAS号540495-04-3 4-methylbenzene...

在 四丁基氢氧化铵体系中,用 氘代二甲亚砜,水 用作溶剂,化学反应 3.0H,以100%的收率获得二苯并-24-冠醚-8
参考文献:通过"轮烷效应"异常稳定的仲铵基团的中和:"游离"仲胺/冠醚型轮烷的合成,结构和动力学性质
标题:通过"轮烷效应"异常稳定的仲铵基团的中和:"游离"仲胺/冠醚型轮烷的合成,结构和动力学性质
摘要:十五年的难题得以解决:冠醚/仲铵盐型轮烷已被中和,这是最流行的化学事件,并且已分离出完全非离子冠醚/仲胺型轮烷.通过将二苯并[24]冠-8醚(db24C8)和具有末端羟基的六氟磷酸仲铵(pf 6)的混合物通过与3,5-二甲基苯甲酸封端制备了[2]轮烷烷作为典型底物在三丁基膦作为催化剂存在下,乙酸酐的收率为90%.研究了几种中和轮烷铵的方法,以分离游离仲仲胺.降低热力学和动力学稳定性的胺型轮烷.一种方法是在其中软抗衡pf抗衡交换法6-通过用四丁基氟化铵混合,从而降低了铵部分的阳离子特征与氟阴离子置换.随后用碱进行简单洗涤,使我们能够定量地分离出游离的仲胺型轮烷.另一种方法是基于保护/解除保护协议的综合.用2,2,2-三氯乙基氯甲酸酯对仲铵基进行酰化,得到n-氨基甲酸酯化的轮烷,可以通过在乙酸中的锌处理将其脱保护,得到相应的游离基.仲胺型轮烷的定量收率.光谱和分析数据充分证实了游离仲胺型轮烷
Doi:10.1002/chem.201000968

专利信息

专利号:US-7125983-B2
优先权日:2000-11-29
标题:L-nucleic acid derivatives and process for the synthesis thereof
发明人：IIZUKA HAJIME; TOGASHI KAZUHIKO; SUZUKI TSUNEJI
权利人:MITSUI CHEMICALS INC
摘要:A novel method has been found to produce 2,2′-anhydro-1-(β-L-arabinofuranosyl)thymine as a novel useful intermediate compound. A novel method has been further found to produce thymidine from 2,2′-anhydro-1-(β-L-arabinofuranosyl)thymine. A novel method has been further found to L-2′-deoxyribose derivatives as a useful synthetic intermediate through L-2,2′-anhydro-5,6-dihydrocyclouridine derivative. According to these methods, synthesis of various L-nucleic acid derivatives, synthesis of which has been difficult till now.

专利号:US-5393511-A
优先权日:1988-10-10
标题 :Synthesis of zeolites of faujasite structure
发明人：DELPRATO FRANCOIS; GUTH JEAN-LOUIS; ANGLEROT DIDIER; ZIVKOV CATHERINE
权利人:ELF AQUITAINE
摘要:A process is provided for the preparation of zeolites belonging to the faujasite structural class and exhibiting a Si:Al ratio higher than 1 in which a reaction mixture is first produced, which has a pH higher than 10 and contains water, a source of tetravalent silicon, a source of trivalent aluminum, a source of hydroxide ions in the form of a strong inorganic or organic base and a structuring agent ST so as to produce an aluminosilicate gel having the desired composition to permit its crystallization into a compound of the faujasite structural class. The gel obtained is kept at a temperature, pressure and for a sufficient period to effect the crystallization of the gel into a precursor of the zeolite consisting of the zeolite trapping the structuring agent ST in its cavities and the precursor is then subjected to a calcination to destroy the structuring agent and to produce the zeolite. The structuring agent ST consists of at least one compound belonging to the group formed by the carbon-containing macrorings and macropolyrings which contain in the rings heteroatoms chosen from oxygen, nitrogen, silicon and sulphur, and which contain 10 to 24 atoms per ring. Precursors of the zeolites are also provided.

专利号:US-5098686-A
优先权日:1988-10-10
标题 :Synthesis of zeolites of faujasite structure
发明人：DELPRATO FRANCOIS; GUTH JEAN-LOUIS; ANGLEROT DIDIER; ZIVKOV CATHERINE
权利人:ELF AQUITAINE
摘要:PCT No. PCT/FR89/00522 Sec. 371 Date Jun. 8, 1990 Sec. 102(e) Date Jun. 8, 1990 PCT Filed Oct. 10, 1989 PCT Pub. No. WO90/03944 PCT Pub. Date Apr. 19, 1990.A process is provided for the preparation of zeolites belonging to the faujasite structural class and exhibiting a Si:Al ratio higher than 1 in which a reaction mixture is first produced which has a pH higher than 10 and contains water, a source of tetravalent silicon, a source of trivalent aluminum, a source of hydroxide ions in the form of a strong inorganic or orgnaic base and a structuring agent ST so as to produce an aluminosilicate gel having the desired composition to permit its crystallization into a compound of the faujasite structural class. The gel obtained is kept at a temperature, pressure and for a sufficient period to effect the crystallization of the gel into a precursor of the zeolite consisting of the zeolite trapping the structuring agent ST in its cavities and the precursor is then subjected to a calcination to destroy the structuring agent and to produce the zeolite. The structuring agent ST consists of at least one compound belonging to the group formed by the carbon-containing macrorings and macropolyrings which contain in the rings, heteroatoms chosen from oxygen, nitrogen, silicon and sulphur, and which contain 10 to 24 atoms per ring. Precursors of the zeolites are also provided.

专利号:WO-9003944-A1
优先权日:1988-10-10
标 题 :Synthesis of zeolites having a faujasite structure

专利号:EP-0364352-A1
优先权日:1988-10-10
标 题:Method for the synthesis of zeolites belonging to the structural family of faujasite, products obtained and their use in adsorption and catalysis

专利号:EP-0364352-B1
优先权日:1988-10-10
标 题:Method for the synthesis of zeolites belonging to the structural family of faujasite, products obtained and their use in adsorption and catalysis