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Upstream product

• 177283-77-1 (4R,5R)-N,N'-dimethoxy-N,N',2,2-tetramethyl-1,3-dioxolane-4,5-dicarboxamide 
• 861853-88-5 (-)-((4R,5R)-5-(4-methoxy-benzoyl)-2,2-dimethyl-[1,3]dioxolan-4-yl)-(4-methoxy-phenyl)-methanone 

Relevant academic research and scientific papers

Synthesis of enantiopure trifluoromethyl building blocks via a highly chemo- and diastereoselective nucleophilic trifluoromethylation of tartaric acid-derived diketones

(Chemical Equation Presented) A highly diastereoselective nucleophilic mono(trifluoromethylation) of a tartaric acid-based diketone, using trifluoromethyl(trimethyl)silane, afforded the corresponding γ-keto trifluoromethylcarbinol. The scope and limitation of this reaction was studied. The acidic removal of the acetonide moiety protecting the two hydroxyl groups of the adducts was unsuccessful. Bis(O-methylation) of the aromatic derivatives under basic conditions, followed by acidic hydrolysis and oxidative cleavage, led to two different enantiopure products: an α-aryl-α-methoxy- α-trifluoromethyl ethanal and an α-aryl-α-methoxycarboxylic acid. The overall process is eventually an interesting way to convert one natural chiral raw material into two functionalized enantiopure building blocks including a trifluoromethyl one.