{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,29]],"date-time":"2026-06-29T18:30:20Z","timestamp":1782757820804,"version":"3.54.5"},"reference-count":6,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2006,1,24]],"date-time":"2006-01-24T00:00:00Z","timestamp":1138060800000},"content-version":"vor","delay-in-days":12076,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Chem. Ber."],"published-print":{"date-parts":[[1973,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Malonester (<jats:bold>1<\/jats:bold>) reagiert mit Methyl\u2010 und Phenylisocyanat in Gegenwart von Tri\u00e4thylamin bei Raumtemperatur zu den Carbamoylmalonestern <jats:bold>2a, b<\/jats:bold>, in der Hitze dagegen zu den bisher noch unbekannten Barbiturs\u00e4ure\u20105\u2010carbons\u00e4ureestern <jats:bold>3<\/jats:bold>. Mit 1\u2010Naphthylisocyanat erfolgt die Cyclisierung zu <jats:bold>3<\/jats:bold> bereits ohne W\u00e4rmezufuhr. Auch <jats:bold>2b<\/jats:bold> bildet mit Methylisocyanat\/Tri\u00e4thylamin in der Hitze einen Barbiturs\u00e4urecarbons\u00e4ureester. Dagegen entstehen aus <jats:bold>2a<\/jats:bold> unter \u00e4hnlichen Bedingungen 5\u2010Carbamoylbarbiturs\u00e4uren <jats:bold>4<\/jats:bold>. Zu einer solchen gelangt man auch bei der Reaktion von Malonanils\u00e4ureester (<jats:bold>6<\/jats:bold>) und Isocyanat in Tri\u00e4thylamin.<\/jats:p>","DOI":"10.1002\/cber.19731060134","type":"journal-article","created":{"date-parts":[[2007,6,28]],"date-time":"2007-06-28T16:10:22Z","timestamp":1183047022000},"page":"312-316","source":"Crossref","is-referenced-by-count":18,"title":["Basenkatalysierte Reaktionen aktiver Methylenverbindungen mit Isocyanaten, 1. Synthese von Barbiturs\u00e4ure\u20105\u2010carbons\u00e4ureestern und \u2010amiden"],"prefix":"10.1002","volume":"106","author":[{"given":"Lilly","family":"Capuano","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul","family":"Boschat","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Horst Walter","family":"Heyer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Georg","family":"Wachter","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2006,1,24]]},"reference":[{"key":"e_1_2_1_1_2","doi-asserted-by":"publisher","DOI":"10.1002\/cber.19050380105"},{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1002\/cber.19040370470"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1021\/jo01266a093"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1002\/cber.19610940857"},{"key":"e_1_2_1_5_2","first-page":"165","author":"Arndt F.","year":"1943","journal-title":"Org. Syntheses, Coll."},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1039\/ct9109700938"}],"container-title":["Chemische Berichte"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fcber.19731060134","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/cber.19731060134","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/chemistry-europe.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/cber.19731060134","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T00:02:03Z","timestamp":1760054523000},"score":1,"resource":{"primary":{"URL":"https:\/\/chemistry-europe.onlinelibrary.wiley.com\/doi\/10.1002\/cber.19731060134"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1973,1]]},"references-count":6,"journal-issue":{"issue":"1","published-print":{"date-parts":[[1973,1]]}},"alternative-id":["10.1002\/cber.19731060134"],"URL":"https:\/\/doi.org\/10.1002\/cber.19731060134","archive":["Portico"],"relation":{},"ISSN":["0009-2940"],"issn-type":[{"value":"0009-2940","type":"print"}],"subject":[],"published":{"date-parts":[[1973,1]]}}}