PROCESS FOR PREPARING 3,7-DIALKYL XANTHINES
Process for preparing 3,7-dialkyl xanthines of formula (I), where R and R are C1-C4 alkyl groups, by reacting 4-aminoimidazole-carboxamide-(5) of formula (II) with an alkali metal cyanate in aqueous solution at pH 3 to 5, followed by cyclization of the resultant urea derivative at pH 8 to 14. Procéd...
Gespeichert in:
| Hauptverfasser: | , , , , |
|---|---|
| Format: | Patent |
| Sprache: | eng ; ger |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | |
|---|---|
| container_issue | |
| container_start_page | |
| container_title | |
| container_volume | |
| creator | KARL, ULRICH BUGGLIN, MARIUS LENZ, HANS-HEINRICH JANITSCHKE, LOTHAR GROPP, HERBERT |
| description | Process for preparing 3,7-dialkyl xanthines of formula (I), where R and R are C1-C4 alkyl groups, by reacting 4-aminoimidazole-carboxamide-(5) of formula (II) with an alkali metal cyanate in aqueous solution at pH 3 to 5, followed by cyclization of the resultant urea derivative at pH 8 to 14.
Procédé pour préparer des 3,7-dialkylxanthines de formule (I), où R1 et R2 sont des groupes alkyle C1-C4, par réaction de 4-aminoimidazole-carboxamide-(5) de formule (II) avec un cyanate de métal alcalin dans une solution aqueuse à un pH compris entre 3 et 5, suivie d'une cyclisation, à un pH compris entre 8 et 14, du dérivé urée résultant. |
| format | Patent |
| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_WO9103477A1</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>WO9103477A1</sourcerecordid><originalsourceid>FETCH-epo_espacenet_WO9103477A13</originalsourceid><addsrcrecordid>eNrjZNAOCPJ3dg0OVnDzD1IICHINcAzy9HNXMNYx13XxdPTxjvRRiHD0C_Hw9HMN5mFgTUvMKU7lhdLcDApuriHOHrqpBfnxqcUFicmpeakl8eH-loYGxibm5o6GxkQoAQAiCSSH</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>PROCESS FOR PREPARING 3,7-DIALKYL XANTHINES</title><source>esp@cenet</source><creator>KARL, ULRICH ; BUGGLIN, MARIUS ; LENZ, HANS-HEINRICH ; JANITSCHKE, LOTHAR ; GROPP, HERBERT</creator><creatorcontrib>KARL, ULRICH ; BUGGLIN, MARIUS ; LENZ, HANS-HEINRICH ; JANITSCHKE, LOTHAR ; GROPP, HERBERT</creatorcontrib><description>Process for preparing 3,7-dialkyl xanthines of formula (I), where R and R are C1-C4 alkyl groups, by reacting 4-aminoimidazole-carboxamide-(5) of formula (II) with an alkali metal cyanate in aqueous solution at pH 3 to 5, followed by cyclization of the resultant urea derivative at pH 8 to 14.
Procédé pour préparer des 3,7-dialkylxanthines de formule (I), où R1 et R2 sont des groupes alkyle C1-C4, par réaction de 4-aminoimidazole-carboxamide-(5) de formule (II) avec un cyanate de métal alcalin dans une solution aqueuse à un pH compris entre 3 et 5, suivie d'une cyclisation, à un pH compris entre 8 et 14, du dérivé urée résultant.</description><language>eng ; ger</language><subject>CHEMISTRY ; HETEROCYCLIC COMPOUNDS ; METALLURGY ; ORGANIC CHEMISTRY</subject><creationdate>1991</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19910321&DB=EPODOC&CC=WO&NR=9103477A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19910321&DB=EPODOC&CC=WO&NR=9103477A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>KARL, ULRICH</creatorcontrib><creatorcontrib>BUGGLIN, MARIUS</creatorcontrib><creatorcontrib>LENZ, HANS-HEINRICH</creatorcontrib><creatorcontrib>JANITSCHKE, LOTHAR</creatorcontrib><creatorcontrib>GROPP, HERBERT</creatorcontrib><title>PROCESS FOR PREPARING 3,7-DIALKYL XANTHINES</title><description>Process for preparing 3,7-dialkyl xanthines of formula (I), where R and R are C1-C4 alkyl groups, by reacting 4-aminoimidazole-carboxamide-(5) of formula (II) with an alkali metal cyanate in aqueous solution at pH 3 to 5, followed by cyclization of the resultant urea derivative at pH 8 to 14.
Procédé pour préparer des 3,7-dialkylxanthines de formule (I), où R1 et R2 sont des groupes alkyle C1-C4, par réaction de 4-aminoimidazole-carboxamide-(5) de formule (II) avec un cyanate de métal alcalin dans une solution aqueuse à un pH compris entre 3 et 5, suivie d'une cyclisation, à un pH compris entre 8 et 14, du dérivé urée résultant.</description><subject>CHEMISTRY</subject><subject>HETEROCYCLIC COMPOUNDS</subject><subject>METALLURGY</subject><subject>ORGANIC CHEMISTRY</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1991</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNAOCPJ3dg0OVnDzD1IICHINcAzy9HNXMNYx13XxdPTxjvRRiHD0C_Hw9HMN5mFgTUvMKU7lhdLcDApuriHOHrqpBfnxqcUFicmpeakl8eH-loYGxibm5o6GxkQoAQAiCSSH</recordid><startdate>19910321</startdate><enddate>19910321</enddate><creator>KARL, ULRICH</creator><creator>BUGGLIN, MARIUS</creator><creator>LENZ, HANS-HEINRICH</creator><creator>JANITSCHKE, LOTHAR</creator><creator>GROPP, HERBERT</creator><scope>EVB</scope></search><sort><creationdate>19910321</creationdate><title>PROCESS FOR PREPARING 3,7-DIALKYL XANTHINES</title><author>KARL, ULRICH ; BUGGLIN, MARIUS ; LENZ, HANS-HEINRICH ; JANITSCHKE, LOTHAR ; GROPP, HERBERT</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_WO9103477A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; ger</language><creationdate>1991</creationdate><topic>CHEMISTRY</topic><topic>HETEROCYCLIC COMPOUNDS</topic><topic>METALLURGY</topic><topic>ORGANIC CHEMISTRY</topic><toplevel>online_resources</toplevel><creatorcontrib>KARL, ULRICH</creatorcontrib><creatorcontrib>BUGGLIN, MARIUS</creatorcontrib><creatorcontrib>LENZ, HANS-HEINRICH</creatorcontrib><creatorcontrib>JANITSCHKE, LOTHAR</creatorcontrib><creatorcontrib>GROPP, HERBERT</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>KARL, ULRICH</au><au>BUGGLIN, MARIUS</au><au>LENZ, HANS-HEINRICH</au><au>JANITSCHKE, LOTHAR</au><au>GROPP, HERBERT</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PROCESS FOR PREPARING 3,7-DIALKYL XANTHINES</title><date>1991-03-21</date><risdate>1991</risdate><abstract>Process for preparing 3,7-dialkyl xanthines of formula (I), where R and R are C1-C4 alkyl groups, by reacting 4-aminoimidazole-carboxamide-(5) of formula (II) with an alkali metal cyanate in aqueous solution at pH 3 to 5, followed by cyclization of the resultant urea derivative at pH 8 to 14.
Procédé pour préparer des 3,7-dialkylxanthines de formule (I), où R1 et R2 sont des groupes alkyle C1-C4, par réaction de 4-aminoimidazole-carboxamide-(5) de formule (II) avec un cyanate de métal alcalin dans une solution aqueuse à un pH compris entre 3 et 5, suivie d'une cyclisation, à un pH compris entre 8 et 14, du dérivé urée résultant.</abstract><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext_linktorsrc |
| identifier | |
| ispartof | |
| issn | |
| language | eng ; ger |
| recordid | cdi_epo_espacenet_WO9103477A1 |
| source | esp@cenet |
| subjects | CHEMISTRY HETEROCYCLIC COMPOUNDS METALLURGY ORGANIC CHEMISTRY |
| title | PROCESS FOR PREPARING 3,7-DIALKYL XANTHINES |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-10T10%3A01%3A03IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-epo_EVB&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=KARL,%20ULRICH&rft.date=1991-03-21&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3EWO9103477A1%3C/epo_EVB%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |