V. V. Imshenetskii

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In the synthesis of v i tamin B e by condensation of 4 -me thy l -5 -p ropoxyoxazo le with bu t ene -2 -d io l l , 4 der iva t ives [1, 2, 3] the impur i t i e s in the or iginal compounds and in the reac t ion in t e rmed ia te s have a cons iderable effect on the yield and quali ty of the final product . The accumulat ion of impur i t i e s occu r s as e(More)
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