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A convenient and synthetically attractive protocol for the regioselective synthesis of homopropargyl alcohols from aldehydes and 2-propynyl halides having terminal alkynes under the aegis of catalytic cupric bromide and stannous chloride in THF is described. In-situ probing by 1 H NMR and MIKE-CID spectrum provides evidence for the copper(I)-catalyzed formation of allenyltrihalostannane.
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Kundu et al. (1999) studied this question.
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