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Volumn 5, Issue 12, 2003, Pages 2111-2114

Highly stereoselective anti SN2′ substitutions of (Z)-allylic pentafluorobenzoates with polyfunctionalized zinc-copper reagents

Author keywords

[No Author keywords available]

Indexed keywords

BENZOIC ACID DERIVATIVE; COPPER COMPLEX; ORGANOMETALLIC COMPOUND; ZINC COMPLEX;

EID: 0141630613     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol034525i     Document Type: Article
Times cited : (118)

References (67)
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    • (i) Luchaco-Cullis, C. A.; Mizutani, H.; Murphy, K. E.; Hoveyda, A. H. Angew. Chem. 2001, 113, 1504; Angew. Chem., Int. Ed. 2001, 40, 1456.
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  • 49
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    • note
    • The allylic alcohol derived from trans-4 was prepared by a Sharpless kinetic resolution; see ref 8 and Supporting Information.
  • 52
    • 0141553157 scopus 로고    scopus 로고
    • note
    • (Z)-allylic alcohol ((Z)-5; (5Z)-7-methyl-5-dodecene) was prepared by Lindlar reduction of the corresponding alkyne (7-methyl-5-dodecyne); see Supporting Information.
  • 53
    • 33645897192 scopus 로고
    • Assuming that an anti substitution via the conformer 1B will lead to the (R)-configuration for (Z)-5. Since only 9% of this isomer was formed, it was not possible to establish its enantiomeric purity by GC analysis. Hoffmann, R. W. Chem. Rev. 1989, 89, 1841.
    • (1989) Chem. Rev. , vol.89 , pp. 1841
    • Hoffmann, R.W.1
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    • note
    • Dibenzylzinc was prepared by reaction of benzylmagnesium bromide with diethylzinc.
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    • Corey, E. J.; Guzman-Perez, A. Angew. Chem. 1998, 110, 402; Angew. Chem., Int. Ed. 1998, 37, 389.
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  • 66
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    • note
    • Although it is stated that the allyl pentafluorobenzoate (S)-(Z)-4 has 99.3% ee, it contains 0.5% of the trans isomer (S)-(E)-4. As a result, the "real" ee for the pure cis compound (S)-(Z)-4 would be 98.6% ee, so the loss of enantiomeric excess during the allylation reaction is even less important.
  • 67
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    • note
    • 2, pentane) afforded the desired alkene (R)-(E)-5 as a colorless liquid (88 mg, 97%, 93% ee).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.