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Diode-array UV spectrometric evidence for a concentration dependent phase transition in dilute aqueous solutions of pluronic F87 (poloxamer 237) pluronic F87 (poloxam237)稀水溶液中浓度依赖性相变的二极管阵列紫外光谱证据
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950001843
S. Gaisford, A. Beezer, J. Mitchell, W. Loh, J. Finnie, Stuart J. Williams
{"title":"Diode-array UV spectrometric evidence for a concentration dependent phase transition in dilute aqueous solutions of pluronic F87 (poloxamer 237)","authors":"S. Gaisford, A. Beezer, J. Mitchell, W. Loh, J. Finnie, Stuart J. Williams","doi":"10.1039/C39950001843","DOIUrl":"https://doi.org/10.1039/C39950001843","url":null,"abstract":"Incubation of dilute polymer solutions with a KI–I2 standard shows the presence of a concentration dependent phase transition for the poly(oxyethylene)+ poly(oxypropylene)+ poly(oxyethylene) block copolymer F87 (P237) using diode-array UV spectrometry; the transition is shown to be reversible and reproducible and is in agreement with previous data obtained via high-sensitivity differential scanning microcalorimetry (HSDSC).","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"63 1","pages":"1843-1844"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80310808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Intercalation of oxide into [Zr(C5Me5)F3] 氧化物在[Zr(C5Me5)F3]中的嵌入
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950002145
A. Künzel, H. Roesky, M. Noltemeyer, H. Schmidt
{"title":"Intercalation of oxide into [Zr(C5Me5)F3]","authors":"A. Künzel, H. Roesky, M. Noltemeyer, H. Schmidt","doi":"10.1039/C39950002145","DOIUrl":"https://doi.org/10.1039/C39950002145","url":null,"abstract":"The reaction of lithium 2,6-di-tert-butylphenoxylate and trifluoro(pentamethylcyclopentadienyl)zirconium in a molar ratio of 2:3 leads to [Li4Zr6F18O2(C5Me5)6] which can be viewed as an interstitial oxide compound of [Zr(C5Me5)F3].","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"311 1","pages":"2145-2146"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77190877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Self-assembly of a novel 14-membered metallamacrobicycle containing two chromium(III) ions as part of the ring skeleton 含有两个铬(III)离子的新型14元金属大环的自组装
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950000963
D. Burdinski, F. Birkelbach, M. Gerdan, A. Trautwein, K. Wieghardt, P. Chaudhuri
{"title":"Self-assembly of a novel 14-membered metallamacrobicycle containing two chromium(III) ions as part of the ring skeleton","authors":"D. Burdinski, F. Birkelbach, M. Gerdan, A. Trautwein, K. Wieghardt, P. Chaudhuri","doi":"10.1039/C39950000963","DOIUrl":"https://doi.org/10.1039/C39950000963","url":null,"abstract":"A metallamacrocycle, [LCrIIIµ-{(Hdmg)2(dmg)}CrIIIL](ClO4)2·MeOH (L = 1,4,7-trimethyl-1,4,7-triazacyclononane; dmg = dianion of dimethylglyoxime), is synthesized by a one-step high yield template reaction and characterized by X-ray crystallography and magnetic susceptibility measurements.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"30 1","pages":"963-964"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81490134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Identification of 1,6,17,21-octahydrobotryococcene in a sediment 沉积物中1,6,17,21-八水新世的鉴定
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950000335
Y. Huang, M. Murray
{"title":"Identification of 1,6,17,21-octahydrobotryococcene in a sediment","authors":"Y. Huang, M. Murray","doi":"10.1039/C39950000335","DOIUrl":"https://doi.org/10.1039/C39950000335","url":null,"abstract":"A novel compound, 1,6,17,21-octahydrobotryococcene, apparently derived from the green alga Botryococcus braunii, is identified in a sediment from Sacred Lake, Mount Kenya.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"10 1","pages":"335-336"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82069704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Pummerer-type rearrangement on aromatic rings: an unprecedented ipso-substitution of the sulfinyl group of p-sulfinylphenyl ethers into oxygen functional groups leading to protected dihydroquinone derivatives 芳环上的pummer型重排:对亚砜基苯基醚的亚砜基史无前例地取代为氧官能团，从而产生受保护的二对苯二酚衍生物
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950002319
S. Akai, Kiyosei Iio, Y. Takeda, H. Ueno, Kayoko Yokogawa, Y. Kita
{"title":"Pummerer-type rearrangement on aromatic rings: an unprecedented ipso-substitution of the sulfinyl group of p-sulfinylphenyl ethers into oxygen functional groups leading to protected dihydroquinone derivatives","authors":"S. Akai, Kiyosei Iio, Y. Takeda, H. Ueno, Kayoko Yokogawa, Y. Kita","doi":"10.1039/C39950002319","DOIUrl":"https://doi.org/10.1039/C39950002319","url":null,"abstract":"The treatment of p-(phenylsulfinyl)phenyl ethers 1 with trifluoroacetic anhydride in the presence of styrene selectively caused the direct ipso-substitution of the sulfinyl groups by trifluoroacetoxy groups, giving the protected dihydroquinone derivatives 3 in high to quantitative yields.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"64 1","pages":"2319-2320"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82095676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
A new short and efficient strategy for the synthesis of quinolone antibiotics 一种合成喹诺酮类抗生素的新方法
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950001319
A. Jackson, O. Meth–Cohn
{"title":"A new short and efficient strategy for the synthesis of quinolone antibiotics","authors":"A. Jackson, O. Meth–Cohn","doi":"10.1039/C39950001319","DOIUrl":"https://doi.org/10.1039/C39950001319","url":null,"abstract":"A simple protocol for the synthesis of quinolone antibiotics is exemplified for the synthesis of norfloxacin; 3-chloro-4-fluoroaniline with triethyl orthoformate is transformed into its N-ethyl-N-formyl derivative which reacts with methyl malonyl morpholide and phosphoryl chloride at 100 °C to give 6-fluoro-7-chloro-1-ethylquinol-4-one-3-carboxylic acid, which has previously been converted into norfloxacin by the action of piperazine.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"23 1","pages":"1319-1319"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78861905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 110
Biosynthetic studies of the DSP toxin DTX-4 and an okadaic acid diol ester DSP毒素DTX-4和冈田酸二醇酯的生物合成研究
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950001623
J. Needham, T. Hu, J. Mclachlan, J. Walter, Jeffrey L. C. Wright
{"title":"Biosynthetic studies of the DSP toxin DTX-4 and an okadaic acid diol ester","authors":"J. Needham, T. Hu, J. Mclachlan, J. Walter, Jeffrey L. C. Wright","doi":"10.1039/C39950001623","DOIUrl":"https://doi.org/10.1039/C39950001623","url":null,"abstract":"Stable isotope incorporation experiments with 13C- and 18O-labelled precursors show that all the carbon atoms in DTX-4 2 and an okadaic acid diol ester 3 are derived from acetate and glycolate, and also identify the acetate and glycolate derived oxygen atoms.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"35 1","pages":"1623-1624"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76442502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 35
Synthesis and crystal structure of a new large cryptand encapsulating a benzene molecule 包封苯分子的新型大隐体的合成及晶体结构
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950000735
R. Janssen, L. Lindoy, Owen A. Matthews, G. Meehan, A. Sobolev, Allan H. White
{"title":"Synthesis and crystal structure of a new large cryptand encapsulating a benzene molecule","authors":"R. Janssen, L. Lindoy, Owen A. Matthews, G. Meehan, A. Sobolev, Allan H. White","doi":"10.1039/C39950000735","DOIUrl":"https://doi.org/10.1039/C39950000735","url":null,"abstract":"The synthesis of two new large cryptands 7a and 7b has been carried out and the X-ray structure of 7b confirms that a benzene guest molecule is encapsulated centrally in its cavity.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"130 1","pages":"735-736"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76523294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Conformational effects on electrical and spectroscopic properties of bi-, ter-, and poly-thiophenes 双噻吩、三噻吩和多噻吩的电学和光谱性质的构象影响
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950000881
T. Benincori, E. Brenna, F. Sannicolo, Licia Trimarco, G. Moro, D. Pitea, T. Pilati, G. Zerbi, G. Zotti
{"title":"Conformational effects on electrical and spectroscopic properties of bi-, ter-, and poly-thiophenes","authors":"T. Benincori, E. Brenna, F. Sannicolo, Licia Trimarco, G. Moro, D. Pitea, T. Pilati, G. Zerbi, G. Zotti","doi":"10.1039/C39950000881","DOIUrl":"https://doi.org/10.1039/C39950000881","url":null,"abstract":"Using conformatcnally constrained bi- and ter-thiophenes, the effects of inter-ring torsional angles on spectroscopic properties of the corresponding polymers are demonstrated; effects on conductivity are complicated by inter-chain contributions.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"49 1","pages":"881-882"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75987641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Determination of the full structure and absolute stereochemistry of the antifungal agent FR-900848: an X-ray crystallographic study of (1R,3S,4R,6S,7S,9R,10S,12R)-quatercyclopropyl-1,12-dimethanediyl di-4-bromobenzoate 抗真菌剂FR-900848的完整结构和绝对立体化学的测定:(1R,3S,4R,6S,7S,9R,10S,12R)-季环丙基-1,12-二甲基二基-4-溴苯甲酸酯的x射线晶体学研究
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950001143
A. Barrett, K. Kasdorf, G. Tustin, D. Williams
{"title":"Determination of the full structure and absolute stereochemistry of the antifungal agent FR-900848: an X-ray crystallographic study of (1R,3S,4R,6S,7S,9R,10S,12R)-quatercyclopropyl-1,12-dimethanediyl di-4-bromobenzoate","authors":"A. Barrett, K. Kasdorf, G. Tustin, D. Williams","doi":"10.1039/C39950001143","DOIUrl":"https://doi.org/10.1039/C39950001143","url":null,"abstract":"Degradation studies and partial synthesis are used to establish the full structure and absolute stereochemistry of the nucleoside antifungal agent FR-900848.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"1 1","pages":"1143-1144"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75991091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
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