Application of 2,4,6-trioxo-pyrimidin-5-ylidene alditols in the synthesis of pyrano[2,3-d]pyrimidines containing a sugar moiety by hetero-Diels–Alder reactions and by conjugate Michael addition–cyclizations |
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收稿时间: | 2013-05-09 |
修稿时间: | 2013-06-21 |
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