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Volumn 39, Issue 11, 1998, Pages 1437-1440

Diastereoselective synthesis of dimethyl cyclopropane-1,1-dicarboxylates from a γ-alkoxy-alkylidene malonate and sulfur and phosphorus ylides

Author keywords

[No Author keywords available]

Indexed keywords

CYCLOPROPANECARBOXYLIC ACID DERIVATIVE; GLYCERALDEHYDE; MALONIC ACID DERIVATIVE; PHOSPHORUS DERIVATIVE; SULFUR DERIVATIVE;

EID: 0032510368     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4039(97)10822-X     Document Type: Article
Times cited : (41)

References (36)
  • 23
    • 0010545129 scopus 로고    scopus 로고
    • note
    • (a) 1 equiv. piperidine, 20°C, 1h (24% yield)
  • 24
    • 0010616778 scopus 로고    scopus 로고
    • note
    • (b) piperidine, 20°C, 24h (30% yield)
  • 26
    • 0000248247 scopus 로고
    • Adams, R. Ed., John Wiley, Chichester
    • (b) Jones, G. in "Organic Reactions" Adams, R. Ed., John Wiley, Chichester 1967, 15, 204.
    • (1967) Organic Reactions , vol.15 , pp. 204
    • Jones, G.1
  • 28
    • 0010611199 scopus 로고    scopus 로고
    • note
    • 2, 20°C, 1h or 80 h (ii) piperidine, benzene, reflux, 72 h (ii) piperidine, benzene, 20°C, 24 h.
  • 31
    • 0010584366 scopus 로고    scopus 로고
    • note
    • 11. We used for that purpose a chiral column Chiralcel OD-H from Daicel Chemical Industries, 0.5×25 cm, solvent : hexane-isopropanol : 97/3, pressure : 47 bar, 1ml / min., UV detection 254 nm, (I)-5 : Rt = 17.8 min. ; (d)-5 : Rt = 19.2 min..
  • 32
    • 0010616779 scopus 로고    scopus 로고
    • note
    • 12b was unsuccessful with PCC even when carried out with AcONa as a buffer, since it provides an intractable mixture of compounds. Swern oxidation leads to the desired aldehyde (d,l)-4 which cannot be fully purified. That is the reason why the yield of (d,l)-5 was so low
  • 34
    • 0010550006 scopus 로고    scopus 로고
    • note
    • 13b that dimethyl ethylidene malonate reacts with isopropylidene triphenyl phosphorane (generated from isopropyl triphenylphosphonium iodide and n-Buli in THF, 20°C, 1 h) to provide the corresponding dimethyl 2-ethyl-cyclopropane-1,1-dicarboxylate (i) in 44 % yield when the reaction is carried out in THF (20°C, 24 h) (ii) in 14% yield when performed in the same solvent but at higher temperature (80°C, 24h) and (iii) in 70 % yield if performed in a THF-DMSO mixture (80°C, 6h)
  • 36
    • 0010581290 scopus 로고    scopus 로고
    • note
    • Si according to the same procedure (Scheme 4).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.