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Volumn 19, Issue 2, 1982, Pages 269-272

Convenient preparation of N‐substituted 2‐amino‐4H‐3,l‐benzoxazin‐4‐ones and 3‐substituted 2,4(1H,3H)‐quinazolinediones

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EID: 84985240034     PISSN: 0022152X     EISSN: 19435193     Source Type: Journal    
DOI: 10.1002/jhet.5570190209     Document Type: Article
Times cited : (49)

References (32)
  • 2
    • 84985246827 scopus 로고
    • b Tetrahedron Letters
    • (1963) , pp. 1195
  • 12
    • 84985284440 scopus 로고    scopus 로고
    • Heating of the sulfuric acid solution does not change the reaction outcome although it seems to decrease the yield somewhat. Thus, when a solution of 0.020 mole of 2k in 10 ml of concentrated sulfuric acid is heated on a steam bath for 1 hour, an 86% of 3k is obtained.
  • 24
    • 0542391734 scopus 로고
    • Heterocyclische β-Enaminoester, 22: Pyrido[2,3-d]pyrimidine aus 2-Amino-3-ethoxycarbonyl-1,4,5,6-tetrahydropyridin und Isocyanaten, Isothiocyanaten, Imidsäureestern, Formamid und Lactimethern
    • (1978) Chemische Berichte , vol.111 , pp. 2297
    • Wamhoff, H.1    Lichtenthäler, L.2
  • 25
    • 84985284420 scopus 로고    scopus 로고
    • In the case of 2k, the mixture does not become clear because a new solid starts forming before all of the starting material has dissolved.
  • 26
    • 84985269845 scopus 로고    scopus 로고
    • For 3a, the solution in sulfuric acid was allowed to stand for 20 hours, whereas for 3m 15 ml of sulfuric acid was used and the solution was allowed to stand for 1.5 hour.
  • 27
    • 84985269849 scopus 로고    scopus 로고
    • In the case of 4d, the mixture was heated for 15 minutes to obtain a clear solution.
  • 28
    • 84985246319 scopus 로고    scopus 로고
    • For 4m, the hot mixture was filtered from a small amount of insoluble solid material.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.