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Volumn 17, Issue 10, 2011, Pages 2842-2845

Organocatalytic michael-alkylation cascade: The enantioselective nitrocyclopropanation of oxindoles

Author keywords

asymmetric catalysis; cyclopropanation; Michael addition; quaternary stereocenters; spiro compounds

Indexed keywords

ASYMMETRIC CATALYSIS; CYCLOPROPANATION; MICHAEL ADDITIONS; QUATERNARY STEREOCENTERS; SPIRO COMPOUNDS;

EID: 79951971249     PISSN: 09476539     EISSN: 15213765     Source Type: Journal    
DOI: 10.1002/chem.201003423     Document Type: Article
Times cited : (139)

References (94)
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    • For interesting reviews on cyclopropanation reactions, see
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    • For selected examples of enantioselective organocatalytic cyclopropanation reactions, see
    • For selected examples of enantioselective organocatalytic cyclopropanation reactions, see
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    • For a detailed screening of the reaction conditions, including those of unprotected oxindoles with catalysts 1a-1c, see the Supporting Information
    • For a detailed screening of the reaction conditions, including those of unprotected oxindoles with catalysts 1a-1c, see the Supporting Information.
  • 88
    • 43449135616 scopus 로고    scopus 로고
    • for a comprehensive review on the cinchona alkaloids as organocatalysts, see
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    • 3 as a scavenger of HBr generated during the ring-closing step, was fundamental to avoid catalyst deactivation thus accelerating the reaction rate, as well as improving the yield. For previous work that employs an inorganic base as an acidic scavenger in aziridination reactions, see
    • 3 as a scavenger of HBr generated during the ring-closing step, was fundamental to avoid catalyst deactivation thus accelerating the reaction rate, as well as improving the yield. For previous work that employs an inorganic base as an acidic scavenger in aziridination reactions, see
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    • The reaction performed with catalyst 1c and an oxindole with a free NH group in toluene after 65 h gave a dramatic decrease in the ee, d.r., and conversion values: 81% conversion, 8.8:1 d.r., and 79% ee, compared with that obtained with N-Boc oxindole (Table 1, entry 1)
    • The reaction performed with catalyst 1c and an oxindole with a free NH group in toluene after 65 h gave a dramatic decrease in the ee, d.r., and conversion values: 81% conversion, 8.8:1 d.r., and 79% ee, compared with that obtained with N-Boc oxindole (Table 1, entry 1).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.