| 摘要 |
The present invention relates to methods of preparing compounds having formula (1), (2), (5), and ((6A)-(6D)) comprising contacting the corresponding ester, an amine with formula NHR1R2, and a Lewis acid having formula MLn, wherein L is a halogen atom or an organic radical, n is 3-5, and M is a group III elemental atom, a group IV elemental atom, As, Sb, V or Fe, wherein A, B, V, X, Z, W, R1, R2, R5, Z1, Z2, Z3, Z4, Z5, Z6, Z7, and Z8 are substituents. Z4, Z5, Z6, Z7, and Z8 are substituents.
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