The transformation of simple hydrocarbons into more complex and valuable products via catalytic C–H bond functionalisation has revolutionised modern synthetic chemistry. An article , which mentions Recommanded Product: 1,5-Diphenylpenta-1,4-dien-3-one, molecular formula is C17H14O. The compound – 1,5-Diphenylpenta-1,4-dien-3-one played an important role in people’s production and life., Recommanded Product: 1,5-Diphenylpenta-1,4-dien-3-one
Phase-transfer catalysed condensation between 4-tert-butylcyclohexanone and bis(benzal)acetone yielded two 4-tert-butyl-7,11-bisarylspiro<5.5>undecane-1,9-dione diastereomers.The stereochemical assignment of these molecules was carried out using two-dimensional (2D) NMR spectroscopy.Combined use of COSY and NOESY spectra of these diastereomers helped in unambiguous and complete proton spin system assignment.In addition, from the application of 2D J-resolved spectra together with the Karplus equation, the exact conformation of the molecules could be established.KEY WORDS Diastereomeric differentiation Spiro annulation PTC double Michael condensation 2D NMR (COSY, NOESY and 2D J-resolved)
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Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate