Synlett 2024; 35(04): 419-422
DOI: 10.1055/a-2047-8456
cluster
11th Singapore International Chemistry Conference (SICC-11)

Regioselective anti-Silyllithiation of Propargylic Amines

Tomohiko Sato
,
Somnath N. Karad
,
Jun Shimokawa
,
This work was supported by the Japan Society for the Promotion of Science (JSPS), KAKENHI (Grant nos. JP19F01033, JP19H00895, JP21H01934), and partly by the Japan Science and Technology Agency (JST), CREST (Grant no. JPMJCR19R4).


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Abstract

The regioselective anti-silyllithiation of propargylic amines is developed to facilitate the efficient synthesis of alkenylsilanes. This reaction generates an alkenyllithium intermediate that is stabilized by the formation of a five-membered cyclic structure through intramolecular coordination of the nitrogen functional group. Upon subsequent treatment with an electrophile, the alkenyllithium intermediate is further functionalized to afford tetrasubstituted allylic amines bearing a β-silicon substituent.

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Publikationsverlauf

Eingereicht: 06. Februar 2023

Angenommen nach Revision: 06. März 2023

Accepted Manuscript online:
06. März 2023

Artikel online veröffentlicht:
12. April 2023

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