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Synthesis 2003(14): 2189-2193
DOI: 10.1055/s-2003-41017
DOI: 10.1055/s-2003-41017
PAPER
© Georg Thieme Verlag Stuttgart · New York
Efficient Addition of Allylsilanes to α,β-Enones Using Catalytic Indium and Trimethylsilyl Chloride
Further Information
Received
3 June 2003
Publication Date:
19 August 2003 (online)
Publication History
Publication Date:
19 August 2003 (online)
Abstract
α,β-Enones undergo an efficient Hosomi-Sakurai reaction with allyltrimethylsilane, in which a catalytic amount of indium is used in the presence of trimethylsilyl chloride as an activator under mild conditions to produce the conjugate addition products in good yields.
Key words
addition reactions - catalysis - indium - Michael additions - silicon
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References
14a was prepared from 1,3-cyclohexadione in 5 steps (PhH, EtOH, TsOH; LDA, allyl iodide; DIBALH; H3O+; Wacker oxidation).
12Compound 15a was prepared from 1,3-cyclohexadione in 7 steps (PhH, EtOH, TsOH; LDA, allyl iodide; Sia2BH, H2O2, NaOH; Swern oxidation; Ph3P=CHCH2TMS; DIBALH; H3O+).