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

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Chinese Journal of Structural Chemistry 1999年第2期18卷 32-34页

作者： Geng, Z Huang, B Chen, QH Capital Normal Univ Dept Chem Beijing 100037 Peoples R China Beijing Normal Univ Dept Chem Beijing 100875 Peoples R China

The crystal structure of the title compound 1, C 22 H 30 BrNO 3, was determined by X ray analysis at 296(1)K. The crystal belongs to othorhombic system, space group P2 12 12 1 with a=9.842(5), b=12.510(5), c=17.763(6) , V=2187(3)  3, Z=4, M r=436.37, D x =1.33 g/cm 3, μ =18.79 cm 1 , F(000) =912 and the final R=0.047 and R w=0.053 for 1429 observed reflections with I≥3σ(I). Structure analysis reveals that the absolute configuration at C 14 of the acetal carbon of the title compound is S.

关键词： crystal structure 2(5H) furanone absolute configuration.

Asymmetric Conjugate Addition of Alcohols to (R)-(-)-5-[(1R,2S,5R)-Menthyloxy]-2-(5H)-furanone

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Chinese Chemical Letters 1997年第5期8卷 365-366页

作者： Fu An KANG Hong Yi YIN and Cheng Lie YIN(Departmenl of Chemistry, Beijing Normal Uviiversity, Beijing 100875) Department of Chemistry Beijing Normal University Beijing 100875 China

A series of enantiomencally pure (4R,5R)-(-)-4-alkryloxy-5-[(1R,2dihydro-2(5H)-furanones (2) have been synthesized in excellent yields via asymmetric conjugateadditions of primary alcohols to (R)-(-)-5-[(1R,2S,5R)-menthyloxy]-2(5H)-furanone (1) in the presenceof a catalytic amount of sodium in DMF, which provides access to new multifunctional homochiralbuilding blocks, optically. pure (R) or (S)-2-alkyloxy- 1,4-butanediols (3).

关键词： HNMR IR Menthyloxy cm KBr De furanone Asymmetric Conjugate Addition of Alcohols to

A NOVEL CHIRAL 5-((-)-BORNYLOXY)-3,4-DICHLORO-2(5H)-furanone:THE EFFICIENT OPTICALLY PURE SYNTHESIS AND STEREOSPECIFIC TANDEM MICHAEL ADDITION-ELIMINATION REACTION

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Chinese Chemical Letters 1993年第8期4卷 675-678页

作者： Qing Hua CHEN Bin HUANC Department of Chemistry,Beijing Normal University,Beijing 100875.

Described is the optically pure synthesis of 5-((-)-bornyloxy)-3,4-dichloro-8(5H)-furanone 4b and the novel tandem Michael addition-elimination reaction of 4b with a seriea of thiols to provide corresponding new chira... 详细信息

关键词：加加 A NOVEL CHIRAL 5 BORNYLOXY DICHLORO-2 furanone

ASYMMETRIC 1,3-DIPOLAR CYCLOADDITION REACTION BY A CHIRAL SOURCE,5-(1-MENTHYLOXY)-2(5-H)-furanone

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Chinese Chemical Letters 1990年第1期1卷 45-46页

作者： Qing Hua CHEN Rei Qi SHU Department of Chemistry,Beijing Normal University,Beijing 100875

5-(1-Menthyloxy)-2(5-H)-furanone is used as s chiral dipolarophile for thermal asymmetric 1,3-dipolar cycloaddition reaction with C-phenyl-N-phenyl nitrone to give the diastereomerically pure cycloaddition product.

关键词： data ppm furanone MENTHYLOXY ASYMMETRIC 1,3-DIPOLAR CYCLOADDITION REACTION BY A CHIRAL SOURCE,5

Hel photoelectron spectroscopic (PES) and quantum chemistry study on the dimeric compound of 2(5H) furanone

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Science China Chemistry 1997年第6期40卷 657-662页

作者：郑世钧王晓慧孟令鹏曹晓燕王殿勋 Department of Chemistry Hebei Normal UniversityShijiazhuang 050091China Institute of Chemistry Chinese Academy of SciencesBeijing 100080China

The HeI photoelectron (PE) spectra of both 2(5H) furanone and its trans-chair-dimenc-compound (t-c-DFN) are *** assignment of the PES bands is made on the basis of band shapes,the PES results of the molecules which have the similar atomic groups,and the restricted Hartree-Fock (RHF) calculations for the molecules *** the results of both PES experimental and theoretical calculations,it is proved that the ionization potential (IPs) of the HOMO for the dimenc-compound is lower than that of the HOMO for the *** the total energy computed for the t-c-DFN is the lowest in the four possible configurations of dimeric-compounds of 2(5H) furanone Therefore the synthesis of t-c-DFN is also the easiest.

关键词： dimeric 2(5H) furanone Hel photoelectron spectroscopy ab initio method

STRUCTURE OF 3-（IMIDAZOLIDIN-2-YLIDENE）-4,5-DIMETHYL-4,5-DIHYDRO-2（3H）-furanone, C9H14O2N2

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结构化学 1984年第1期 37-40页

作者： Chen Beriming and Huang ZhitangInstitute of Chemistry, Academia. Sinica, Beijing

Mr=182.25, Orthorhombic, Pna21, a=10.698(4), b=9.779(4), c=8.872(5)A, Z=4, V=928.1(7)A3, Dx=1.3 Mgm-3, λ(MoKα)=0 . 71069A, μ(MoKα) = 1.0cm-1, F(000)=392, room temperature, R=0.034 for 637 reflections. The lactone ring and imidazolidine ring are twisted mutually by 12.3°. The two methyl groups are in cis positions relative to the lactone ring. There exist intramolecular and intermolecular hydrogen bonds in the structure.

关键词： IMIDAZOLIDIN-2-YLIDENE STRUCTURE OF 3 O2N2 DIMETHYL-4,5-DIHYDRO-2 furanone XRD C9H

Synthesis and Mesomorphic Properties of 2-（4-Alkoxybenzoyloxy or 4-Alkoxycinnamoyloxy）-5-oxo-2,5-dihydrofurans

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Chinese Journal of Chemistry 2005年第12期23卷 1683-1687页

作者：郭辉韩杰王海英孟继本 Department of Chemistry Nankai University Tianjin 300071 China

Two series of p-alkoxybenzoates Ia-If and p-alkoxycinnamates IIa-IIf, each species beating one terminal furanone, have been synthesized and characterized by IR, ^13C NMR, ^1H NMR, MS spectra and elemental analysis. The mesogenic properties of both series of furanones have been studied by polarizing optical microscopy and differential scanning calorimetry （DSC）. The relationship between structures and mesogenic properties was discussed. The results show that the increased alkoxy chain length （C7-C12） and the bridging groups between the benzene ring and the furanone ring affected the mesomorphic properties greatly, and the two series of furanones might display monotropic or enantiotropic nematic （N） or semetic C （SmC） mesophases and different mesomorpic phase temperature ranges corresponding to different carbon chain length.

关键词： furanone benzoate cinnamate liquid crystal synthesis

Synthesis of tetrahydrofuro[3,2-b]quinolin-2(3H)-one derivatives from 2-aminobenzaldehydes and α-angelica lactone via a tandem Aldol/Michael addition

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Journal of Chinese Pharmaceutical Sciences 2017年第3期26卷 163-172页

作者：季泠尹大伟王欣李润涛北京大学医学部药学院天然药物及仿生国家重点实验室北京100191

An efficient synthesis of tetrahydrofuro[3,2-b]quinolin-2（3H）-ones from α-angelica lactone and 2-aminobenzaldehydes via a tandem Aldol-Michael addition is described. The reactions were carried out using DBU as the ... 详细信息

关键词： Aldol/Michael tandem cyclization Tetrahydroquinoline furanone

A Novel Antibacterial Dental Resin Composite

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Journal of Biomaterials and Nanobiotechnology 2012年第2期3卷 130-135页

作者： Yiming Weng Voon J. Chong Leah Howard Ruijie Huang Richard L. Gregory Dong Xie Department of Biomedical Engineering Purdue School of Engineering and Technology Indiana University-Purdue University at Indianapolis Indianapolis USA Department of Oral Biology School of Dentistry Indiana University Indianapolis USA

This study reports the synthesis and evaluation of a novel furanone-containing antibacterial resin composite. Compres-sive strength (CS) and S. mutans viability were used to evaluate the mechanical strength and antibacterial activity of the composites. With 5% to 30% addition of the furanone derivative, the composite showed no change in CS but a significant antibacterial activity with a 16% - 68% reduction in the S. mutans viability. Further, the antibacterial activity of the modified composite was not affected by human saliva. The aging study implies that the modified composite may have a long-lasting antibacterial function. Within the limitations of this study, it appears that this experimental resin composite may potentially be developed into a clinically attractive dental restorative due to its high mechanical strength and antibacterial function.

关键词： furanone Derivative Antibacterial Resin Composite CS S. mutans Viability