863129-69-5

Upstream product

• 1210-05-5 Biphenyl-2,2'-dicarbaldehyde 
• 35019-66-0 (4S,5S)-2,2-dimethyl-4-phenyl-1,3-dioxan-5-amine 
• 38274-14-5 2,2'-bis-(bromomethyl)-1,1'-biphenyl 
• 85-01-8 phenanthrene 

Relevant academic research and scientific papers

Enantioselective olefin epoxidation using homologous amine and iminium catalysts-a direct comparison

Homologous biphenyl and (diastereomeric) binaphthyl tertiary azepines and quaternary iminium salts were prepared from (+)-(S,S)-l-acetonamine. Both the amines and iminium ions behave as effective catalysts for the enantioselective epoxidation of unfunctio

Biphasic enantioselective olefin epoxidation using tropos dibenzoazepinium catalysts

Several novel chiral iminium TRISPHAT [tris(tetrachlorobenzenediolato) phosphate(V)] salts combining a diphenylazepinium core, chiral exocyclic appendages, and lipophilic counterions have been prepared and tested in biphasic enantioselective olefin epoxidation conditions. Interestingly, the iminium salts derived from commercially available (S)- or (R)-1,2,2-trimethylpropylamine can display efficiency similar to those made from L-acetonamine. Variable-temperature NMR spectroscopy (VT-NMR) and circular dichroism (CD) experiments were performed in search of a correlation between good enantioselectivity in the products and high diastereomeric control of the biphenyl axial chirality of the catalysts.