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Volumn 38, Issue 23, 1999, Pages 3540-3542

Silica-supported tantalum catalysts for asymmetric epoxidations of allyl alcohols

Author keywords

Asymmetric Catalysis; Epoxidations; Heterogeneous catalysis; Surface chemistry; Tantalum

Indexed keywords

ALLYL ALCOHOL; HYDROPEROXIDE; SILICON DIOXIDE; TANTALUM; TITANIUM;

EID: 0033521191     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/(SICI)1521-3773(19991203)38:23<3540::AID-ANIE3540>3.0.CO;2-U     Document Type: Article
Times cited : (71)

References (20)
  • 1
    • 84941217488 scopus 로고
    • (Ed.: J. D. Morrison). Academic Press, New York
    • B. E. Rossiter in Asymmetric Synthesis, Vol. 5 (Ed.: J. D. Morrison). Academic Press, New York, 1985, p. 193.
    • (1985) Asymmetric Synthesis, Vol. 5 , vol.5 , pp. 193
    • Rossiter, B.E.1
  • 15
    • 0344333630 scopus 로고    scopus 로고
    • note
    • This already known surface reaction[14] leads to the liberation of neopentane (ca. 1.5 mol per mol of grafted Ta) with the formation of a mixture of two well-defined surface species, 2a and 2b.
  • 16
    • 0345628176 scopus 로고    scopus 로고
    • note
    • Step 2: 2.5 mol of neopentane evolved per mol of surface tantalum.
  • 17
    • 0345628177 scopus 로고    scopus 로고
    • note
    • |Ta|#1: 4.92wt% Ta. C/Ta = 8.9; [Ta]#2: 5.40wt% Ta, C/Ta = 7.2; [Ta]#3: 5.63 wt% Ta. C/Ta = 7.1. For a mixture of 3a (50%) and 3b (50%) a theoretical value of C/Ta = 7 should be observed; this is the case for [Ta]#2 and [Ta|#3. For [Ta]#1 the higher value may be explained by the presence of SiOEt species.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.