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Volumn 127, Issue 11, 2005, Pages 3774-3789

Lewis base activation of Lewis acids: Catalytic, enantioselective addition of silyl ketene acetals to aldehydes

Author keywords

[No Author keywords available]

Indexed keywords

ACTIVATION ANALYSIS; ADDITION REACTIONS; ALDEHYDES; CATALYSIS; ETHERS; POSITIVE IONS; SILICON;

EID: 15744387149     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja047339w     Document Type: Article
Times cited : (209)

References (135)
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    • note
    • The diastereoselectivity reported in this work for the aldol product derived from 1-naphthaldehyde 5b and 2e (9eb) is higher than that reported in the previous communication. The species originally assigned as the syn diastereomer of 9eb was, in fact, the aldol product derived from 2-naphthaldehyde (9ec). Commercially available 1-naphthaldehyde is contaminated with 2-4% 2-naphthaldehyde (Aldrich). This isomer could not be removed by simple distillation. The observed enantioselectivity is unaffected as the peaks for 9eb and 9ec were well separated in the CSP-SFC analysis.
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    • note
    • 1H NMR analysis.
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    • (a) Granovsky, A. A. (http://classic.chem.msu.su/gran/gamess/index.html).
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    • note
    • It is reasonable to assume that the aldol reaction occurs through the α-chloro trichlorosilyl ether because products derived from reactions with aliphatic aldehydes give similar levels of selectivity and the same sense of asymmetric induction as that observed with other substrates.
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    • note
    • 2EtN may also facilitate catalyst turnover as was seen in the reactions of allyltrichlorosilanes (ref 18).
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.