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Volumn 1, Issue 7, 1999, Pages 961-964

Catalytic oxidative carbonylation of primary and secondary α,ω-diamines to cyclic ureas

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EID: 0000391940     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol990690f     Document Type: Article
Times cited : (41)

References (37)
  • 34
    • 85034132818 scopus 로고    scopus 로고
    • note
    • 2 layer was concentrated and then taken up into methanol, while the red solid was rinsed with methanol. Both methanol fractions were combined and concentrated to obtain a yellow powder. The yellow powder was then sublimed to obtain a white solid (0.29 g, 40% yield, TON = 40). The solid was identified as 2-imidazolidinone by comparison with an authentic sample.
  • 35
    • 85034119286 scopus 로고    scopus 로고
    • note
    • 3 (3.63 g, 26.4 mmol), and 140 equiv of iodine (3.02 g, 11.9 mmol). The vessel was then charged with 100 atm of CO and left to stir under pressure at room temperature for 24 h. The pressure was released, and the yellow solution was filtered away from a white solid and concentrated. The resulting pale yellow oil was dissolved in ethyl acetate and chromatographed on silica with ethyl acetate as eluent to obtain a colorless liquid (0.68 g, 47% yield, TON = 70). The liquid was identified as 1,3-dimethyl-2-imidazolidinone by comparison with an authentic sample.
  • 37
    • 85034154102 scopus 로고    scopus 로고
    • note
    • These initial studies were carried out with substituted benzyl amines in which intramolecular reaction of the functional group with the amine was not possible. Studies of more complex substrates are in progress.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.