Synthesis of Chiral Tetrasubstituted Azetidines from Donor–Acceptor Azetines via Asymmetric Copper(I)‐Catalyzed Imido‐Ylide [3+1]‐Cycloaddition with Metallo‐Enolcarbenes.
- Resource Type
- Article
- Authors
- Marichev, Kostiantyn O.; Wang, Kan; Dong, Kuiyong; Greco, Nicole; Massey, Lynée A.; Deng, Yongming; Arman, Hadi; Doyle, Michael P.
- Source
- Angewandte Chemie. 11/4/2019, Vol. 131 Issue 45, p16334-16338. 5p.
- Subject
- *CATALYTIC hydrogenation
*ACID derivatives
*CHIRAL centers
*COPPER
*CATALYSIS
*NITROALDOL reactions
*ASYMMETRIC synthesis
- Language
- ISSN
- 0044-8249
The all‐cis stereoisomers of tetrasubstituted azetidine‐2‐carboxylic acids and derivatives that possess three chiral centers have been prepared in high yield and stereocontrol from silyl‐protected Z‐γ‐substituted enoldiazoacetates and imido‐sulfur ylides by asymmetric [3+1]‐cycloaddition using chiral sabox copper(I) catalysis followed by Pd/C catalytic hydrogenation. Hydrogenation of the chiral p‐methoxybenzyl azetine‐2‐carboxylates occurs with both hydrogen addition to the C=C bond and hydrogenolysis of the ester. [ABSTRACT FROM AUTHOR]