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  4. Synthesis of bicyclo[3.1.0]hexanes by (3+2) annulation of cyclopropenes with aminocyclopropanes
 
research article

Synthesis of bicyclo[3.1.0]hexanes by (3+2) annulation of cyclopropenes with aminocyclopropanes

Muriel, Bastian  
•
Gagnebin, Alec  
•
Waser, Jerome  
December 14, 2019
Chemical Science

We report the convergent synthesis of bicyclo[3.1.0]hexanes possessing an all-carbon quaternary center via a (3 + 2) annulation of cyclopropenes with cyclopropylanilines. Using an organic or an iridium photoredox catalyst and blue LED irradiation, good yields were obtained for a broad range of cyclopropene and cyclopropylaniline derivatives. The reaction was highly diastereoselective when using difluorocyclopropenes together with a removable substituent on the cyclopropylaniline, giving access to important building blocks for medicinal chemistry. With efficient methods existing for the synthesis of both reaction partners, our method grants a fast access to highly valuable bicyclic scaffolds with three contiguous stereocenters.

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CS2019-10716GreenAccess.pdf

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openaccess

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CC BY-NC

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