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New methodologies using sulfur ylides for the enantioselective alpha-Heterofunctionalization of carbonyl compounds

Grant number: 18/17800-3
Support type:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): December 01, 2018
Effective date (End): March 31, 2022
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal Investigator:Antonio Carlos Bender Burtoloso
Grantee:Lucas Giani Furniel
Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

Alpha-heterofunctionalized carbonyl compounds have a wide versatility as synthetic building blocks, due to a variety of transformations that these can participate. However, there are a limited number of asymmetric methodologies to prepare this class of compounds. Therefore, the development of such methodologies is of great importance in the area of organic synthesis. Combining this need with the synthetic potential of sulfur ylides, this project aim to develop new methodologies using these ylides for enantioselective ±-heterofunctionalization of carbonyl compounds.To do so, asymmetric N-H and O-H insertion reactions with acylated sulfur ylides will be evaluated. This strategy would allow the access to ±-aminocarbonyl, ±-hydroxy esthers and ±-carbonyl ethers. There are no reports in the literature for this transformation in an asymmetric fashion.As for the asymmetric synthesis of ±-halogenated and ±-sulfenyl carbonyl compounds, will be evaluated S-H insertion, alkylation/halogenation and dehalogenation reactions catalyzed by chiral Lewis acid. Asymmetric version of this methodology is also unprecedented. (AU)