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Volumn 54, Issue 13, 1998, Pages 2967-3042

Allylic protecting groups and their use in a complex environment Part II: Allylic protecting groups and their removal through catalytic palladium π-allyl methodology

Author keywords

[No Author keywords available]

Indexed keywords

ALLYL COMPOUND; PALLADIUM;

EID: 0032568384     PISSN: 00404020     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4020(97)10383-0     Document Type: Review
Times cited : (271)

References (267)
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    • Part I : Tetrahedron report number 428
    • 1. Part I : Tetrahedron Report Number 428, Tetrahedron 1997, 53, 13509-13555.
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    • 2. For reviews or books partially concerned with this topic, see: (a) Kunz, H. Ang. Chem. Int. Ed. Engl. 1987, 26, 294-308;
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    • (1991) Comprehensive Organic Synthesis , vol.4 , pp. 585-661
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    • (f) Tsuji J. Pure Appl. Chem. 1986, 58, 869-878 and 1982, 54, 197-206;
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    • (g) Tsuji, J. Tetrahedron 1986, 42, 4361-4401;
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    • The reaction studied by the authors involve oxidative addition to phenyl iodide and not to allylic electrophiles. It is however our belief that the conclusions drawn by these authors, if not strictly transposable to π-allyl palladium chemistry, remain highly instructive
    • 5. The reaction studied by the authors involve oxidative addition to phenyl iodide and not to allylic electrophiles. It is however our belief that the conclusions drawn by these authors, if not strictly transposable to π-allyl palladium chemistry, remain highly instructive.
  • 39
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    • unpublished results from our laboratory
    • 23. unpublished results from our laboratory.
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    • allyl carbonates: (a) ref 3g
    • 31. allyl carbonates: (a) ref 3g;
  • 48
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    • formula presented
    • 77. Note however recent evidence that palladium-assisted allylic carbon-carbon bond cleavage may occur, especially in the case of quaternary allylic β-dicarbonyl compunds, as testified for instance in the isomerization reaction of eq. i : Nilsson, Y. I. M.; Andersson, P. G.; Bäckvall, J.-E. J. Am. Chem. Soc. 1993, 115, 6609-6613. (formula presented)
    • (1993) J. Am. Chem. Soc. , vol.115 , pp. 6609-6613
    • Nilsson, Y.I.M.1    Andersson, P.G.2    Bäckvall, J.-E.3
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    • A similar mechanism applies to the deprotection of allyl carbonates
    • 78. A similar mechanism applies to the deprotection of allyl carbonates.
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    • unpublished observations from our laboratory
    • 79. unpublished observations from our laboratory.
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    • 103. For recent utilizations of this system, see: (a) Zhang, D.; Liebeskind, L. S. J. Org. Chem. 1996, 61, 2594-2595;
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    • Doctorat en Sciences, Université Paris-Sud, November 16
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    • 107. Palladium catalysed azidation of allyl esters with trimethylsilyl azide in the absence of fluoride cocatalyst requires heating at 52°C: Safi, M.; Fahrang, R.; Sinou, D. Tetrahedron Lett. 1990, 31, 527-530.
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    • Review: ref. 2f
    • 108. Review: ref. 2f
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    • ref. 18
    • 120. ref. 18
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    • formula presented
    • 133. A 6-electron 6-center cyclic process may also be envisioned (eq. below). For a recent discussion of electrocyclic processes in π-allyl palladium chemistry, see: Keinan, E.; Kumar, S.; Danjur, V.; Vaya, J. J. Am. Chem. Soc. 1994, 116, 11151-11152. (formula presented)
    • (1994) J. Am. Chem. Soc. , vol.116 , pp. 11151-11152
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    • note
    • 2H). If so, side formation of allylamine should be avoidable by adding the Alloc derivative to a preheated solution of scavengers and catalyst.
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    • 159. alkoxy-or acyloxyborates compounds: see Steinberg, H. Organoboron Chemistry, John Wiley, 1964, pp 775-792.
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    • 169. As shown in scheme 6, the Alloc group is selectively removable in the presence of the Dde group. The reverse is also true, provided that the hydrazinolysis of the Dde group is carried out in the presence of an ethylenic compound such as allyl alcohol. Otherwise, partial reduction of the allyloxycarbonyl group to propargyloxycarbonyl group is observed (Dumy, P., personal communication).
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    • The N-indolyl-Alloc derivative of tryptophane has not been tested in this reaction
    • 198. The N-indolyl-Alloc derivative of tryptophane has not been tested in this reaction.
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    • 104 On the other hand, palladium catalysed allylation of ethylthiotrimethylsilane by allylic carbonates and epoxides has been reported (Trost, B. M.; Scanlan, T. S. Tetrahedron Lett. 1986, 27, 4141-4144).
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    • For recent examples of use of the Alloc group for hydroxyl group protection in carbohydrates, see refs 18 and 145
    • 212. For recent examples of use of the Alloc group for hydroxyl group protection in carbohydrates, see refs 18 and 145.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.