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2004
Halogenated carboxylic acids and esters
Q 0430
A Simple and Facile Stereoselective Synthesis of (Z)- and (E)-Allyl Halides Cataby Silica Supported Sodium Hydrogen Sulfate: Factors Influencing the
49- 080 lyzed
Yields and Stereochemistry of Allyl Halides. — Under optimized conditions,
alkenes (I) and (IV) are converted into (Z)-allyl bromides and iodides exclusively or
almost exclusively by treatment with LiBr or LiI. The use of other solvents, metallic
halides, and heterogeneous catalysts in the reactions of compounds (Ia), (Ic), and (Id)
affords only lower yields and lower (Z)-selectivities. — (DAS*, B.; BANERJEE, J.;
RAVINDRANATH, N.; Tetrahedron 60 (2004) 38, 8357-8361; Org. Div.-I, Indian
Inst. Chem. Technol., Hyderabad 500 007, India; Eng.) — Klein
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