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Volumn 10, Issue 3, 2006, Pages 500-504

Improved practical asymmetric synthesis of α-alkylmandelic acids utilizing highly diastereoselective alkylation of 5-aryl-2-(1-naphthyl)-1,3- dioxolan-4-ones

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Indexed keywords


EID: 33745762715     PISSN: 10836160     EISSN: None     Source Type: Journal    
DOI: 10.1021/op050263j     Document Type: Article
Times cited : (17)

References (40)
  • 35
    • 33745758785 scopus 로고    scopus 로고
    • note
    • Intermediates 6, 7, and 7′ were not be isolable, due to the thermal instability. Private communication from the Banyu group: A careful technique of azeotropic removal of i-PrOH under reduced pressure at low temperature was required to generate intermediate 6.
  • 36
    • 33745763006 scopus 로고    scopus 로고
    • note
    • Because a conformational effect, such as 2-(1-naphthyl)- and 5-aryl-substituents of 9, would occupy a pseudoequatorial position, cis-acetal formation should be thermodynamically favoured.
  • 38
    • 33745753169 scopus 로고    scopus 로고
    • CambridgeSoft Corporation: Cambridge, Massachusetts
    • (b) A computer-assisted conformation analysis, exemplified by 9a, supports this speculation [MM2 force field, ChemBats3D 5.0 Windows, CambridgeSoft Corporation: Cambridge, Massachusetts].
    • MM2 Force Field, ChemBats3D 5.0 Windows
  • 40
    • 33745741340 scopus 로고    scopus 로고
    • note
    • Probably because intermediary 1-naphthylmethylinum cation was generated more smoothly than tert-butylmethylinium cation, 1-naphthaldehyde underwent rapid and safe acetal formation to give 9.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.