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Volumn 60, Issue 7, 2004, Pages 1531-1539

Group 3 metal (Sc, La) triflates as catalysts for the carbomethoxylation of aliphatic amines with dimethylcarbonate under mild conditions

Author keywords

Amines; Carbamate esters; Dimethylcarbonate; Lanthanum triflate; Scandium triflate

Indexed keywords

ALIPHATIC AMINE; CARBONIC ACID DERIVATIVE; LANTHANUM; SCANDIUM;

EID: 0742320252     PISSN: 00404020     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tet.2003.12.020     Document Type: Article
Times cited : (40)

References (66)
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    • 2O resulted to be poorly soluble in DMC (Table 1). No solubilization of the used salt was observed upon subsequent addition of the amine
    • 2O resulted to be poorly soluble in DMC (Table 1). No solubilization of the used salt was observed upon subsequent addition of the amine.
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    • 2 to the DMC solution of the Sc salt (see later in the text)
    • 2 to the DMC solution of the Sc salt (see later in the text).
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    • Analogous conclusions can be drawn also when an amine/DMC molar ratio higher than 1 is used (Table 4)
    • Analogous conclusions can be drawn also when an amine/DMC molar ratio higher than 1 is used (Table 4).
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    • note
    • 3H (1 equiv.) in diethylether.
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    • note
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    • 3, the reaction mixture, initially heterogeneous, became homogeneous within 1.5 h
    • 3, the reaction mixture, initially heterogeneous, became homogeneous within 1.5 h.
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    • +·), 87, 57, 42) analyses. After 8 h at 65°C, the selectivity (determined by GC) of the carbomethoxylation process was equal to 92% and decreased to 87% after 23 h
    • +·), 87, 57, 42) analyses. After 8 h at 65°C, the selectivity (determined by GC) of the carbomethoxylation process was equal to 92% and decreased to 87% after 23 h.
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    • Minor amounts of Scandium (III) remain in solution and can be recovered, together with residual amounts of alkylammonium triflate, by means of extractions with water (see Section 4)
    • Minor amounts of Scandium (III) remain in solution and can be recovered, together with residual amounts of alkylammonium triflate, by means of extractions with water (see Section 4).
  • 62
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    • note
    • CO in free carbamate esters).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.