References
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- El-Ladhdach , A. , Matheu , M. and Castillon , S. 1994 . Tetrahedron , 50 ( 42 ) : 12219 In this work phenylsulfenylchloride was added to a fural to give a trans beta chloro sulfide intermediate which was subsequently displaced via a Lewis acid catalyzed reaction. Here phenylselenenylchloride was added to glycals to give trans beta chloro selenides which were utilized in a subsequent acid catalyzed condensation with protected pyrimidines
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- In compound (4) the coupling constant of the pyranyl protons between C-2 and C-3 is 10.2 Hz which is indicative of a trans relationship. The corresponding coupling constant in compound (3) of the furanyl protons C-2 and C-3 is 6.3 Hz
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