Copper(I)-Catalyzed Synthesis of Unsymmetrical All-Carbon Bis-Quaternary Centers at the Opposing α-Carbons of Cyclohexanones.

Copper(I)-Catalyzed Synthesis of Unsymmetrical All-Carbon Bis-Quaternary Centers at the Opposing α-Carbons of Cyclohexanones.
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DOI:
10.1021/acs.orglett.2c01890
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发表时间:
2022-07-08
期刊:
影响因子:
5.2
通讯作者:
Kartika, Rendy
Kartika, Rendy
中科院分区:
化学1区
文献类型:
--
作者:
Malone, Joshua A.;Philkhana, Satish Chandra;Stepherson, Jacob R.;Badmus, Fatimat O.;Fronczek, Frank R.;Kartika, Rendy

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We describe a new synthetic reaction that generates all-carbon bis-quaternary centers at the opposing side of α-carbons in cyclohexanone with four different substituents in a controlled manner. Catalyzed by Cu(MeCN)4BF4 salt, this chemistry is proposed to proceed via an intermediacy of unsymmetrical O-allyl oxyallyl cations, which undergo a sequence of regioselective nucleophilic addition with substituted indoles and diastereoselective Claisen rearrangement in a single synthetic operation. The stereochemical outcome of the products features the cis diastereorelationship between the two aryl groups at the α,α′-positions.
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