Abstract
A convenient synthesis and structural characterization of ( Z)- and ( E)- trans-2,3-dihydro-2-methyl-3-(1,2,4-triazolyl)-4 H-1-benzopyran-4-one oxime ethers has been achieved. By analysis of vicinal interproton coupling constants, it is believed that trans-2,3-dihydro-2-methyl-3-(1,2,4-triazolyl)-4 H-1-benzopyran-4-ones which exist predominantly in the diequatorial half-chair or sofa conformation was found to exist predominantly in the diaxial orientation upon conversion to the corresponding oxime ether derivatives.
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