The occurrence of a wide range of stable complex cations formed by the hydrogen bonding of two or more non-heterocyclic bases has been demonstrated by vibrational spectroscopy.
由两个或两个以上的非杂环碱的氢键形成的稳定的络合阳离子的范围广泛的发生已经证明了振动光谱。
{"title":"Infrared evidence for complex hydrogen bonded cations","authors":"R. Clements, F. N. Masri, J. Wood","doi":"10.1039/C29710001530","DOIUrl":"https://doi.org/10.1039/C29710001530","url":null,"abstract":"The occurrence of a wide range of stable complex cations formed by the hydrogen bonding of two or more non-heterocyclic bases has been demonstrated by vibrational spectroscopy.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"37 1","pages":"1530-1532"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73213883","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}
Treatment of 4-alkyl-1,2-benzoquinones with p-anisidine in methanol solution results in displacement of the 4-alkyl group by a p-anisdinyl group.
用对茴香胺在甲醇溶液中处理4-烷基-1,2-苯醌，导致4-烷基被对茴香二基取代。
{"title":"The displacement of alkyl side-chains from ortho-quinones","authors":"W. Horspool, P. Smith, J. Tedder","doi":"10.1039/C2971000222A","DOIUrl":"https://doi.org/10.1039/C2971000222A","url":null,"abstract":"Treatment of 4-alkyl-1,2-benzoquinones with p-anisidine in methanol solution results in displacement of the 4-alkyl group by a p-anisdinyl group.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75369287","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}
(+)-cis-3-(2-Hydroxyethyl)-2,2,5-trimethyl-cyclopentanone and its racemic form are synthesised from (+)-α-2,3-epoxypinane or (–)-trans-pinocarveol, and (±)-2,2,5-trimethyl-1-oxocyclopentane-3-carboxylic acid, respectively; treatment with base of the chloroketone, derived from the (+)-hydroxyketone, affords (+)-fenchone, while pyrolysis of the (+)-acetoxyketone gives (+)-cis-2,2,5-trimethyl-3-vinylcyclopentanone, the latter and its trans-isomer being photo-products of (–)-trans-and (–)-cis-caran-4-one, respectively.
{"title":"Total synthesis of (±)-fenchone, a synthesis of (+)-fenchone and of (+)-cis-2,2,5-trimethyl-3-vinylcyclopentanone, a photoisomer of (–)-trans-caran-4-one","authors":"P. Boyle, W. Cocker, D. H. Grayson, P. Shannon","doi":"10.1039/C29710000395","DOIUrl":"https://doi.org/10.1039/C29710000395","url":null,"abstract":"(+)-cis-3-(2-Hydroxyethyl)-2,2,5-trimethyl-cyclopentanone and its racemic form are synthesised from (+)-α-2,3-epoxypinane or (–)-trans-pinocarveol, and (±)-2,2,5-trimethyl-1-oxocyclopentane-3-carboxylic acid, respectively; treatment with base of the chloroketone, derived from the (+)-hydroxyketone, affords (+)-fenchone, while pyrolysis of the (+)-acetoxyketone gives (+)-cis-2,2,5-trimethyl-3-vinylcyclopentanone, the latter and its trans-isomer being photo-products of (–)-trans-and (–)-cis-caran-4-one, respectively.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"174 1","pages":"395-396"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75447988","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}
cis- and trans-isomers of 2,2,3,4,4-pentamethyl-phosphetan oxides can be distinguished by the paramagnetic shifts of the respective 3-protons in their n.m.r. spectra in the presence of tris(dipivalomethanato) europium(III), Eu(DPM)3.
{"title":"Assignment of configuration to 2,2,3,4,4-pentamethylphosphetan oxides using tris(dipivalomethanato)europium(III)","authors":"J. Corfield, S. Trippett","doi":"10.1039/C29710000721","DOIUrl":"https://doi.org/10.1039/C29710000721","url":null,"abstract":"cis- and trans-isomers of 2,2,3,4,4-pentamethyl-phosphetan oxides can be distinguished by the paramagnetic shifts of the respective 3-protons in their n.m.r. spectra in the presence of tris(dipivalomethanato) europium(III), Eu(DPM)3.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"42 1","pages":"721-722"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75596438","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}
The mode of cleavage of 1,2,2-trimethylbicyclo-[1,1,0]butane is shown to be dependent on the nature of the ligands attached to the transition-metal catalysts.
1,2,2-三甲基双环-[1,1,0]丁烷的裂解模式取决于与过渡金属催化剂连接的配体的性质。
{"title":"Ligand dependency in the transition-metal-promoted rearrangements of derivatives of bicyclo[1,1,0]butane","authors":"P. G. Gassman, G. Meyer, F. J. Williams","doi":"10.1039/C29710000842","DOIUrl":"https://doi.org/10.1039/C29710000842","url":null,"abstract":"The mode of cleavage of 1,2,2-trimethylbicyclo-[1,1,0]butane is shown to be dependent on the nature of the ligands attached to the transition-metal catalysts.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"31 1","pages":"842-843"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75600874","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}
Hydrogen-bonding in o-hydroxybenzaldehyde activates the carbonyl function towards reduction by Hantzsch ester (I); the mechanism of NADH action.
邻羟基苯甲醛中的氢键激活羰基功能，使其被Hantzsch酯(I)还原;NADH的作用机制。
{"title":"Non-enzymatic models of NADH action–importance of hydrogen-bonding in the enzyme-coenzyme-substrate complex","authors":"U. Pandit, F. R. M. Cabré","doi":"10.1039/C29710000552","DOIUrl":"https://doi.org/10.1039/C29710000552","url":null,"abstract":"Hydrogen-bonding in o-hydroxybenzaldehyde activates the carbonyl function towards reduction by Hantzsch ester (I); the mechanism of NADH action.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"329 1","pages":"552-552"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74058387","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}
Chelation in the transition state affects Grignard reactions with 2-α-hydroxyalkyl-(or α-hydroxyaryl)-cyclopentanones and 2-benzoyl-(or acyl)-cyclopentanols.
{"title":"Stereospecificity and catalysis via chelation in Grignard reactions of some β-hydroxy-ketones","authors":"E. Ghera, S. Shoua","doi":"10.1039/C29710000398","DOIUrl":"https://doi.org/10.1039/C29710000398","url":null,"abstract":"Chelation in the transition state affects Grignard reactions with 2-α-hydroxyalkyl-(or α-hydroxyaryl)-cyclopentanones and 2-benzoyl-(or acyl)-cyclopentanols.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"1 1","pages":"398-399"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74151438","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}
The preparation and n.m.r. spectra of di- and tri-fluorophosphoranes, containing the 2,4-di-t-butyl-catechol ring system linked to five-co-ordinate phosphorus, are described.
描述了二氟磷烷和三氟磷烷的制备及其与五配位磷相连的2,4-二叔丁基儿茶酚环体系的核磁共振光谱。
{"title":"Dioxabenzofluorophospholes containing more than one fluorine atom bonded to phosphorus","authors":"M. Eisenhut, R. Schmutzler","doi":"10.1039/C29710001452","DOIUrl":"https://doi.org/10.1039/C29710001452","url":null,"abstract":"The preparation and n.m.r. spectra of di- and tri-fluorophosphoranes, containing the 2,4-di-t-butyl-catechol ring system linked to five-co-ordinate phosphorus, are described.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"78 1","pages":"1452-1453"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74177819","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}
7-Oxo-7-deacetoxykhivorin has been transformed into the diene-lactone (XI), a postulated biogenetic precursor of the bicyclonanolide group of tetranortriterpenoids, which when treated with very mild base readily undergoes intramolecular Michael addition to give mexicanolide (XII).
{"title":"Partial synthesis of mexicanolide from 7-oxo-7-deacetoxykhivorin","authors":"J. D. Connolly, Ian M. S. Thornton, D. Taylor","doi":"10.1039/C29710000017","DOIUrl":"https://doi.org/10.1039/C29710000017","url":null,"abstract":"7-Oxo-7-deacetoxykhivorin has been transformed into the diene-lactone (XI), a postulated biogenetic precursor of the bicyclonanolide group of tetranortriterpenoids, which when treated with very mild base readily undergoes intramolecular Michael addition to give mexicanolide (XII).","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"23 1","pages":"17-18"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74183546","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}
Treatment of 1,2,4-triazin-3(2H)-ones with ethereal, chloramine at room temperatures gives 1,2,3-triazoles in high yield.
在室温下，用乙醛氯胺处理1,2,4-三嗪-3(2H)- 1得到高产的1,2,3-三唑。
{"title":"New synthesis of 1,2,3-triazoles","authors":"C. Rees, A. A. Sale","doi":"10.1039/C29710000532","DOIUrl":"https://doi.org/10.1039/C29710000532","url":null,"abstract":"Treatment of 1,2,4-triazin-3(2H)-ones with ethereal, chloramine at room temperatures gives 1,2,3-triazoles in high yield.","PeriodicalId":17278,"journal":{"name":"Journal of The Chemical Society D: Chemical Communications","volume":"47 1","pages":"532-532"},"PeriodicalIF":0.0,"publicationDate":"1971-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74208773","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}
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