Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 14, Issue 11, Pages 1941-1944Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201900315
Keywords
1,3-O-transposition; density functional theory; reaction mechanisms; trisubstituted Z-enol esters; ynones
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Funding
- NSFC [31890774, 31890770]
- Guangdong NSF [2016A030310433]
- Hunan NSF [2018JJ3868]
- Youth Scientific Research Foundation of CSUFT [QJ2017005B]
- CSUFT
- National Supercomputer Center in Guangzhou
- National Supercomputer Center in LvLiang
- PKUSZ
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Ynones are useful substrates for transition-metal-mediated synthesis. The Au-I-catalyzed 1,3-O-transposition is an important reaction of ynones. Recently, an efficient Cu-I-catalyzed synthesis of trisubstituted Z-enol esters via interrupting the traditional 1,3-O-transposition reaction of ynones was reported by Zhu's group. Herein, density functional theory studies disclosed that the hydrogen bond formed by carboxylic acid plays an important role for the reactivity and selectivity in this novel reaction. A qualitative rule was also found to explain the substituent effect in the ynone substrate, and this is consistent with experiments. The Au-I-catalyst and Cu-I-catalyst were further compared to interpret the essential cause of why the Au-I-catalyst prefers the 1,3-O-transpostion reaction. These conclusions might be helpful for the rational design of reactions of ynones.
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