Nickel-Catalyzed Asymmetric Negishi Cross-Couplings of Secondary Allylic Chlorides with Alkylzincs
作者:Sunghee Son、Gregory C. Fu
DOI:10.1021/ja800103z
日期:2008.3.1
Complementing previous advances in allylation chemistry, an effective nickel/Pybox catalyst for regioselective asymmetric Negishi cross-couplings of racemic secondary allylic chlorides with readily available organozinc halides has been developed. The method has been applied in two key steps of a formal total synthesis of fluvirucinine A(1).
Palladium-Catalyzed Tandem Bis-allylation of Isocyanates
作者:Niclas Solin、Sanjay Narayan、Kálmán J. Szabó
DOI:10.1021/ol015545s
日期:2001.3.1
[GRPAHICS]A tandem bis-allylation of p-toluenesulfonyl isocyanate can be achieved by palladium-catalyzed three-component coupling reaction with allylstannanes and allyl chlorides, A high level of regioselectivity can be obtained by the appropriate choice of the allylic substituents. The reaction mechanism and the regiochemistry of the reaction can be explained by formation of an amphoteric bis-allylpalladium intermediate, This bis-allylpalladium intermediate undergoes an initial electrophilic attack on one of the allyl moieties followed by a nucleophilic attack on the other.
DE508891
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ABDRAXMANOV, I. B.;GATAULLIN, R. R.;MUSTAFIN, A. G.;TOLSTIKOV, G. A.;BAJK+, ZH. ORGAN. XIMII, 26,(1990) N, S. 1527-1532
作者:ABDRAXMANOV, I. B.、GATAULLIN, R. R.、MUSTAFIN, A. G.、TOLSTIKOV, G. A.、BAJK+
DOI:——
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Staudinger; Ruzicka, Helvetica Chimica Acta, 1924, vol. 7, p. 385