New discoveries in chemical research and development in 2021. Chemical research careers are more diverse than they might first appear, as there are many different reasons to conduct research and many possible environments. In a patent, 185137-29-5, name is (S)-4-Phenylthiazolidine-2-thione, introducing its new discovery. name: (S)-4-Phenylthiazolidine-2-thione
The development of new efficient and easily accessible catalysts has been one of the focuses in asymmetric phase-transfer catalysis. In this paper, a novel class of chiral bifunctional thiourea-ammonium phase-transfer catalysts were synthesized from commercially available alpha-amino acids. The structural modularity of these catalysts permits facile tunings to achieve optimum results, which was demonstrated in catalyzing the aza-Henry reaction with excellent enantioselectivities (up to 99.5% ee) and diastereoselectivities (up to >25:1 dr).
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Reference：
Quinuclidine – Wikipedia,
Quinuclidine | C7H782N | ChemSpider