|
1
|
Félix ARG, Simões PR, Sousa FJ, Serra MES, Murtinho D. Chiral Thiazolidine based Organocatalysts: Synthesis and Application in Asymmetric Aldol Reactions. LETT ORG CHEM 2020. [DOI: 10.2174/2210681209666190807155816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Several novel chiral organocatalysts derived from thiazolidines containing amide and thioureia
functionalities were synthesized in good yields. These organocatalysts were tested in the asymmetric
aldol reaction of acetone with p-nitrobenzaldehyde. Reaction parameters such as reaction time, catalyst
loading and solvent were optimized. Products with conversions up to 84% and enantiomeric ratios
(er) up to 84.5:15.5 (R:S) were obtained. The effect of several chiral and non-chiral additives on the
reactivity and selectivity of the reaction was also evaluated. The reaction was extended to other aromatic
aldehydes with the best organocatalyst and when p-bromobenzaldehyde was used, an er of
94.5:5.5 (R:S) was obtained.
Collapse
Affiliation(s)
- Ana Rita G. Félix
- CQC, Department of Chemistry, University of Coimbra, Coimbra, Portugal
| | - Pedro R.D. Simões
- CQC, Department of Chemistry, University of Coimbra, Coimbra, Portugal
| | | | | | - Dina Murtinho
- CQC, Department of Chemistry, University of Coimbra, Coimbra, Portugal
| |
Collapse
|
|
2
|
Gavendova M, Lennon CM, Coffey L, Manesiotis P, Kinsella M. Novel
β
‐amino Amide Organocatalysts for the Synthesis of Pharmaceutically Relevant Oxindoles. ChemistrySelect 2019. [DOI: 10.1002/slct.201901360] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Mariana Gavendova
- Pharmaceutical and Molecular Biotechnology Research CentreDepartment of ScienceWaterford Institute of Technology Cork Road, Waterford Ireland
| | - Claire M. Lennon
- Pharmaceutical and Molecular Biotechnology Research CentreDepartment of ScienceWaterford Institute of Technology Cork Road, Waterford Ireland
| | - Lee Coffey
- Pharmaceutical and Molecular Biotechnology Research CentreDepartment of ScienceWaterford Institute of Technology Cork Road, Waterford Ireland
| | - Panagiotis Manesiotis
- School of Chemistry and Chemical EngineeringQueen's University BelfastDavid Keir Building Stranmillis Road, Belfast BT9 5AG United Kingdom
| | - Michael Kinsella
- Pharmaceutical and Molecular Biotechnology Research CentreDepartment of ScienceWaterford Institute of Technology Cork Road, Waterford Ireland
| |
Collapse
|
|
3
|
Wei J, Guo W, Zhou X, Du X, Liu Y, Li C. Highly Enantioselective Reactions of Cyclohexanone andβ,γ-Unsaturatedα-Keto Ester: The Tuning of Chemo-selectivities by Secondary and Primary Amine Catalysts. CHINESE J CHEM 2014. [DOI: 10.1002/cjoc.201400431] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
|
4
|
Bayat S, Tejo BA, Abdulmalek E, Yahya NM, Salleh AB, Abdul Rahman MB. Enantioselectivity Investigation of Short Polar Peptides with Different Positions in the Michael Reaction. SYNTHETIC COMMUN 2013. [DOI: 10.1080/00397911.2012.736005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|