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Volumn 51, Issue 27, 2010, Pages 3547-3549

DMAP-catalyzed cyanation of aldehydes and ketones with ethyl cyanoformate

Author keywords

[No Author keywords available]

Indexed keywords

4 DIMETHYLAMINOPYRIDINE; ALDEHYDE; CARBONIC ACID DERIVATIVE; FORMIC ACID DERIVATIVE; KETONE;

EID: 77954242937     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2010.04.123     Document Type: Article
Times cited : (29)

References (59)
  • 1
    • 85064432185 scopus 로고
    • For recent reviews on synthesis and reactions of cyanohydrins, see: M. North Synlett 1993 807 820
    • (1993) Synlett , pp. 807-820
    • North, M.1
  • 46
    • 0029805627 scopus 로고    scopus 로고
    • For cyanations with acyl cyanides, see: M. Okimoto, and T. Chiba Synthesis 1996 1188 1190
    • (1996) Synthesis , pp. 1188-1190
    • Okimoto, M.1    Chiba, T.2
  • 55
    • 77954242652 scopus 로고    scopus 로고
    • note
    • 2 (29%) and EtOH (56%).
  • 56
    • 77954242941 scopus 로고    scopus 로고
    • note
    • 3 in MeOH to afford the corresponding cyanohydrin in 93% yield.
  • 57
    • 77954244178 scopus 로고    scopus 로고
    • note
    • 4. After concentration, the crude material was purified by column chromatography (silica gel: 6 g, hexane-EtOAc: 6/1) to give the product 7a (115.0 mg, 96% yield) as a colorless solid.
  • 58
    • 77954242344 scopus 로고    scopus 로고
    • note
    • Typical procedure for cyanation of ketones catalyzed by DMAP (Table 3, entry 3): To a stirred mixture of ketone 8b (0.45 mmol, 1.0 equiv.) and DMAP (5.5 mg, 0.045 mmol, 10 mol %) was added ethyl cyanoformate (3) (0.049 mL, 0.5 mol, 1.1 equiv) at room temperature under argon atmosphere. The mixture was stirred at the same temperature for 24 h. The mixture was purified by column chromatography (silica gel: 6 g, hexane-EtOAc: 4/1) to give the product 9b (88.0 mg, 99% yield) as a colorless oil.
  • 59
    • 77954244415 scopus 로고    scopus 로고
    • note
    • Pyridine and N,N-dimethylaniline did not promote the cyanation. Therefore, the nucleophilicity of DMAP plays an important role in the cyanation, as observed in DMAP-promoted acylation of alcohols.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.