A. Kennedy, R. Mulvey, C. Raston, B. A. Roberts, R. Rowlings
The title compound represents the first potassium example of a novel class of amide-supported heterobimetallic macrocycle having a dicationic (N4K2Mg2)2+ octagonal ring framework surrounding a dianionic (O2)2- core.
{"title":"Inverse crown ether complexes: extension to potassium through the synthesis of [{[(Me3Si)(2)N](4)K2Mg2(O-2)}(infinity)], a peroxo- centred macrocycle linked into infinite chains by intermolecular K center dot center dot center dot CH3(SiMe2) interac","authors":"A. Kennedy, R. Mulvey, C. Raston, B. A. Roberts, R. Rowlings","doi":"10.1039/a809681c","DOIUrl":"https://doi.org/10.1039/a809681c","url":null,"abstract":"The title compound represents the first potassium example of a novel class of amide-supported heterobimetallic macrocycle having a dicationic (N4K2Mg2)2+ octagonal ring framework surrounding a dianionic (O2)2- core.","PeriodicalId":9713,"journal":{"name":"Chemical Communications (london)","volume":"285 1","pages":"353-354"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77437350","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 infrared spectra of stereoisomers of several piperidines and their N-methyl derivatives in carbon tetrachloride have been measured in the region of 3020 to 2500 cm−1. The estimated intensities (A) of their Bohlmann bands have been analyzed, provided that Formula (1) concerning the intensity defined in the text holds for the compounds examined. The result indicates that piperidine exists mainly, but not exclusively, in the conformation with the lone pair axial.
{"title":"Infrared-spectral studies on the orientation of the lone pairs in piperidine derivatives","authors":"T. Masamune, M. Takasugi","doi":"10.1039/C19670000625","DOIUrl":"https://doi.org/10.1039/C19670000625","url":null,"abstract":"The infrared spectra of stereoisomers of several piperidines and their N-methyl derivatives in carbon tetrachloride have been measured in the region of 3020 to 2500 cm−1. The estimated intensities (A) of their Bohlmann bands have been analyzed, provided that Formula (1) concerning the intensity defined in the text holds for the compounds examined. The result indicates that piperidine exists mainly, but not exclusively, in the conformation with the lone pair axial.","PeriodicalId":9713,"journal":{"name":"Chemical Communications (london)","volume":"1 1","pages":"244-245"},"PeriodicalIF":0.0,"publicationDate":"1968-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90919342","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}
Abstract Oxidation of methyl 4,6- O -benzylidene-2-deoxy-α- D - lyxo -hexopyranoside ( 3 ) with ruthenium tetroxide gave the 3-ketone 4 in high yield. Treatment of ketone 4 with methylmagnesium iodide gave predominantly methyl 4,6- O -benzylidene-2-deoxy-3- C -methyl-α- D - xylo -hexopyranoside (5), which was converted into the 3- O -methyl derivative ( 6 ). The reaction of compound 6 with N -bromosuccinimide afforded methyl 4- O -benzoyl-6-bromo-2,6-dideoxy-3- C -methyl-3- O -methyl-α- D - xylo -hexopyranoside (7) in high yield. Compound 7 was converted, by catalytic debenzoylation and reductive debromination, into methyl α- D -arcanoside (9). Acid-catalyzed hydrolysis of glycoside 9 gave D -arcanose ( 10 ). Configurational studies support the 2,6-dideoxy-3- C -methyl-3- O -methyl- xylo -hexose structure for arcanose.
摘要甲基4,6- O -苄基-2-脱氧-α- D -赖基-六吡喃苷(3)与四氧化钌氧化得到高产率的3-酮4。用甲基碘化镁处理酮4得到甲基4,6- O -苄基-2-脱氧-3- C -甲基-α- D -木基-六吡喃苷(5)，并转化为3- O -甲基衍生物(6)。化合物6与N -溴丁二酰亚胺反应得到高产率的甲基4- O -苯甲酰-6-溴-2,6-二脱氧-3- C -甲基-3- O -甲基-α- D -木-六吡喃苷(7)。化合物7经催化去苯甲酰化和还原脱溴化转化为甲基α- D -奥秘苷(9)，糖苷9经酸催化水解得到D -奥秘糖(10)。构型研究支持2,6-二脱氧-3- C -甲基-3- O -甲基-木糖-己糖的结构。
{"title":"The synthesis of D-arcanose","authors":"G. Howarth, W. Szarek, J. K. Jones","doi":"10.1039/C1968000062B","DOIUrl":"https://doi.org/10.1039/C1968000062B","url":null,"abstract":"Abstract Oxidation of methyl 4,6- O -benzylidene-2-deoxy-α- D - lyxo -hexopyranoside ( 3 ) with ruthenium tetroxide gave the 3-ketone 4 in high yield. Treatment of ketone 4 with methylmagnesium iodide gave predominantly methyl 4,6- O -benzylidene-2-deoxy-3- C -methyl-α- D - xylo -hexopyranoside (5), which was converted into the 3- O -methyl derivative ( 6 ). The reaction of compound 6 with N -bromosuccinimide afforded methyl 4- O -benzoyl-6-bromo-2,6-dideoxy-3- C -methyl-3- O -methyl-α- D - xylo -hexopyranoside (7) in high yield. Compound 7 was converted, by catalytic debenzoylation and reductive debromination, into methyl α- D -arcanoside (9). Acid-catalyzed hydrolysis of glycoside 9 gave D -arcanose ( 10 ). Configurational studies support the 2,6-dideoxy-3- C -methyl-3- O -methyl- xylo -hexose structure for arcanose.","PeriodicalId":9713,"journal":{"name":"Chemical Communications (london)","volume":"57 10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1968-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83413132","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}
{"title":"A new synthesis of depsidones; diploicin","authors":"J. Hendrickson, M. Ramsay","doi":"10.1039/C19680001101","DOIUrl":"https://doi.org/10.1039/C19680001101","url":null,"abstract":"","PeriodicalId":9713,"journal":{"name":"Chemical Communications (london)","volume":"26 1","pages":"1101-1102"},"PeriodicalIF":0.0,"publicationDate":"1968-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73455649","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}
{"title":"Nuclear magnetic resonance investigation of restricted rotation of some vinylogous amides","authors":"J. Dąbrowski, L. Kozerski","doi":"10.1039/C19680000586","DOIUrl":"https://doi.org/10.1039/C19680000586","url":null,"abstract":"","PeriodicalId":9713,"journal":{"name":"Chemical Communications (london)","volume":"52 1","pages":"586-587"},"PeriodicalIF":0.0,"publicationDate":"1968-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74032852","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}
{"title":"Direct removal of sodium chloride from water by reaction with pp′-methylenedianiline","authors":"T. C. Shields","doi":"10.1039/C1968000832A","DOIUrl":"https://doi.org/10.1039/C1968000832A","url":null,"abstract":"","PeriodicalId":9713,"journal":{"name":"Chemical Communications (london)","volume":"130 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1968-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75288408","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}
{"title":"The applicability of nuclear magnetic resonance for the determination of anomeric configuration of purine nucleosides","authors":"R. J. Cushley, S. Lipsky, W. McMurray, J. Fox","doi":"10.1039/C19680001611","DOIUrl":"https://doi.org/10.1039/C19680001611","url":null,"abstract":"","PeriodicalId":9713,"journal":{"name":"Chemical Communications (london)","volume":"19 1","pages":"1611-1613"},"PeriodicalIF":0.0,"publicationDate":"1968-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75411625","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}
{"title":"Manool-derived diterpenic hydrocarbons and related products","authors":"E. Wenkert, Z. Kumazawa","doi":"10.1039/C19680000140","DOIUrl":"https://doi.org/10.1039/C19680000140","url":null,"abstract":"","PeriodicalId":9713,"journal":{"name":"Chemical Communications (london)","volume":"30 1","pages":"140-142"},"PeriodicalIF":0.0,"publicationDate":"1968-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75421920","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}
{"title":"Isomerisations under electron impact. The imide–isomide interconversion and its dithione analogue","authors":"C. M. Anderson, R. Warrener, C. S. Barnes","doi":"10.1039/C19680000166","DOIUrl":"https://doi.org/10.1039/C19680000166","url":null,"abstract":"","PeriodicalId":9713,"journal":{"name":"Chemical Communications (london)","volume":"105 1","pages":"166-168"},"PeriodicalIF":0.0,"publicationDate":"1968-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74462919","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}
{"title":"The reaction of carbonylcarbene with oxygen","authors":"R. Peterson, R. Wolfgang","doi":"10.1039/C19680001201","DOIUrl":"https://doi.org/10.1039/C19680001201","url":null,"abstract":"","PeriodicalId":9713,"journal":{"name":"Chemical Communications (london)","volume":"10 1","pages":"1201-1202"},"PeriodicalIF":0.0,"publicationDate":"1968-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74688159","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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