Triazole-Au(I) complex as chemoselective catalyst in promoting propargyl ester rearrangements.
Triazole-Au(I) complex as chemoselective catalyst in promoting propargyl ester rearrangements.
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DOI:
10.3762/bjoc.7.115
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发表时间:
2011
影响因子:
2.7
通讯作者:
Shi X
中科院分区:
文献类型:
--
作者:
Wang D;Zhang Y;Cai R;Shi X
Triazole–Au (TA–Au) catalysts were employed in several transformations involving propargyl ester rearrangement. Good chemoselectivity was observed, which allowed the effective activation of the alkyne without affecting the reactivity of the allene ester intermediates. These results led to the investigation of the preparation of allene ester intermediates with TA–Au catalysts under anhydrous conditions. As expected, the desired 3,3-rearrangement products were obtained in excellent yields (generally >90% yields with 1% loading). Besides the typical ester migrating groups, carbonates and carbamates were also found to be suitable for this transformation, which provided a highly efficient, practical method for the preparation of substituted allenes.
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