Acceleration of a dipolar Claisen rearrangement by Hydrogen bonding to a soluble diaryl^urea
摘要：
The Claisen rearrangement of 6-methoxy allyl vinyl ether is catalyzed by a soluble diaryl urea, and evidence is presented that the urea stabilizes a dipolar transition state by hydrogen bonding.
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DOI：
10.1016/00404-0399(50)1394-W
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年份：
1995
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