Abstract Summary: The preparation and characterization of a new type of nanocomposite material that is based on biodegradable polylactide (PLA) and organically modified layered titanate, is reported. Layered titanate, modified with a N ‐(cocoalkyl)‐ N , N ‐[bis(2‐hydroxyethyl)]‐ N ‐methylammonium cation, was used as a new nanofiller (OHTO) for the nanocomposite preparation. Wide‐angle X‐ray diffraction and transmission electron microscopy (TEM) analyses confirmed that titanate layers were intercalated and nicely distributed in the PLA matrix. The materials properties of neat PLA improved remarkably after nanocomposite preparation. UV/vis transmission spectra of neat PLA and a nanocomposite. magnified image UV/vis transmission spectra of neat PLA and a nanocomposite.
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
One-pot transformation of 3-methyl-2-(2-oxo-4-phenylsulfonylthio-1-azetidinyl)-2,4-pentadienoates 8, derived from penicillins, into 2-exo-methylenecephems 1 has been achieved by successive treatment with sodium benzenesulfinate and 1,8-diazabicyclo[5.4.0] undec-7-ene (DBU) in dimethylformamide.
3-Formyl-3-cephems 3 were prepared by direct oxidation of 3-iodomethyl-3-cephems 2 in N,N-dimethyl-formamide in the presence of rhodium(III) chloride trihydrate/aluminum, vanadyl acetylacetonate, or vanadyl sulfate under an oxygen or an air atmosphere.
Abstract Direct conversion of 1-(3-chloro-2-hydroxy-1-p-methoxybenzyloxycarbonyl-1-propenyl)-4-(phenylsulfonylthio)azetidinones derived from penicillin G into 3-hydroxycephems was performed successfully by the action with BiCl4/Sn or TiCl4/Sn bimetal redox couples in DMF containing pyridine.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDeprotection of carboxylic esters of .beta.-lactam homologs. Cleavage of p-methoxybenzyl, diphenylmethyl, and tert-butyl esters effected by a phenolic matrixSigeru Torii, Hideo Tanaka, Masatoshi Taniguchi, Yutaka Kameyama, Michio Sasaoka, Takashi Shiroi, Ryo Kikuchi, Ichiro Kawahara, Akihiro Shimabayashi, and Shigemitsu NagaoCite this: J. Org. Chem. 1991, 56, 11, 3633–3637Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Published inissue 1 May 1991https://pubs.acs.org/doi/10.1021/jo00011a034https://doi.org/10.1021/jo00011a034research-articleACS PublicationsRequest reuse permissionsArticle Views1943Altmetric-Citations34LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
