Organocatalytic Activation of Donor-Acceptor Cyclopropanes: A Tandem (3+3)-Cycloaddition/Aryl Migration toward the Synthesis of Enantioenriched Tetrahydropyridazines

被引:12
|
作者
Hazra, Arijit [1 ]
Dey, Raghunath [1 ]
Kushwaha, Apoorv [2 ]
Kumar, T. J. Dhilip [2 ]
Banerjee, Prabal [1 ]
机构
[1] Indian Inst Technol Ropar, Dept Chem, Lab 406, Rupnagar 140001, Punjab, India
[2] Indian Inst Technol Ropar, Dept Chem, Quantum Dynam Lab, Rupnagar 140001, Punjab, India
关键词
SILYL ETHERS; RACEMIZATION; TRANSFORMATION; REACTIVITY; ALDEHYDES; ACCESS;
D O I
10.1021/acs.orglett.3c01804
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Anorganocatalytic enantioselective (3 + 3)-cycloaddition reactionof racemic cyclopropane carbaldehydes and aryl hydrazones has beendemonstrated for the first time. A wide range of enantioenriched tetrahydropyridazineswith an exocyclic double bond were obtained with moderate to goodyields and good to excellent enantiomeric excesses. Mechanistic investigationshinted toward a matched/mismatched kinetic resolution, and controlexperiments and DFT calculations unveiled that 1,3-aryl migrationwas concerted and intramolecular and proceeds via a four-memberedtransition state.
引用
收藏
页码:5470 / 5475
页数:6
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