133319-27-4

Upstream product

• 1120-73-6 2-methyl-2-cyclopenten-1-one 
• 133201-84-0 (2S,3S)-3-[(E)-(R)-3-((R)-tert-Butyl-phenyl-phosphinoyl)-1-methyl-allyl]-2-methyl-2-((E)-3-oxo-but-1-enyl)-cyclopentanone 
• 133201-85-1 4-((R)-tert-Butyl-phenyl-phosphinoyl)-butan-2-ol 
• 133319-29-6 (R_p)-(E)-But-2-enyl-tert-butylphenylphosphine oxide 
• 21448-79-3 (R)-tert-butylmethylphenylphosphine oxide 
• 133201-87-3 (2S,3S)-3-[(S)-3-((R)-tert-Butyl-phenyl-phosphinoyl)-1-methyl-propyl]-2-methyl-2-(3-oxo-butyl)-cyclopentanone 

Relevant academic research and scientific papers

The Preparation of (R)- and (S)-(E)-But-2-enyl-t-butylphenylphosphine Oxides and their Enantiospecific Conversion into Enantiomeric Hydrindenones related to Vitamin D

The individual enantiomers of (E)-but-2-enyl-t-butylphenylphosphine oxide have been prepared, and the lithiated carbanions of each undergo completely stereoselective conjugate addition with 2-methylcyclopent-2-enone to generate enolates, which upon reacti