Organocatalytic asymmetric [4 + 1] annulation of in situ generated ortho-quinomethanes with 4-halo pyrazolones: straightforward access to chiral spiro-benzofuran pyrazolones

Ming-Ming Chu, Suo-Suo Qi + Show 5 more

https://doi.org/10.1039/c9qo00332k

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Journal: Organic Chemistry Frontiers	Publication Date: Jan 1, 2019
Citations: 37

Abstract

Asymmetric [4 + 1] annulation of ortho-quinomethanes with 4-halo pyrazolones was developed to construct spiro-benzofuran pyrazolones.

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