Li, XH; Gong, JF; Song, MP in [Li, Xue-Hong; Gong, Jun-Fang; Song, Mao-Ping] Zhengzhou Univ, Green Catalysis Ctr, Coll Chem, Zhengzhou 450001, Peoples R China published Diastereoselective synthesis of chiral 3-substituted isoindolinones via rhodium(iii)-catalyzed oxidative C-H olefination/annulation in 2021, Cited 104. The Name is 1,4-Dioxa-8-azaspiro[4.5]decane. Through research, I have a further understanding and discovery of 177-11-7. “Safety of 1,4-Dioxa-8-azaspiro[4.5]decane.
A new method for the direct and stereoselective synthesis of 3-substituted isoindolinones via Rh(iii)-catalyzed chiral N-sulfinyl amide directed asymmetric [4 + 1] annulation of benzamides with acrylic esters has been developed. The reaction proceeded through an oxidative C-H olefination and a subsequent cyclization by intramolecular aza-Michael addition, producing a series of diastereoisomeric chiral isoindolinones (20 examples) in generally good yields with a dr value up to 5.5 : 1. The absolute configurations of the newly formed C-stereocenters in the major and minor diastereomers of the catalysis product have been determined by X-ray crystal diffraction analysis to be S and R, respectively. The separation of the major diastereoisomers from the catalysis products and subsequent removal of the N-sulfinyl chiral auxiliary afforded enantiomerically pure (S)-isoindolinones. The application of the obtained (S)-isoindolinones in the synthesis of several biologically active isoindolinones such as (S)-PD172938, (S)-pazinaclone and (S)-pagoclone is presented.
Safety of 1,4-Dioxa-8-azaspiro[4.5]decane. About 1,4-Dioxa-8-azaspiro[4.5]decane, If you have any questions, you can contact Li, XH; Gong, JF; Song, MP or concate me.
Reference：
Piperidine – Wikipedia,
Piperidine | C5H7510N – PubChem