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Published in 2017 at "New Journal of Chemistry"
DOI: 10.1039/c7nj02168b
Abstract: An exo-selective one-pot synthesis of novel spiro[cyclohexanone-pyrandione] derivatives through two sequential organobase-catalysed 1,4-conjugate additions of pyran-2,4-dione precursors on diarylideneacetone derivatives is described. The resulting 7,11-diaryl-2-oxaspiro[5.5]undec-3-ene-1,5,9-triones were obtained as a 2 : 1 mixture of exo- and endo-diastereomers…
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Keywords:
spiro cyclohexanone;
cyclohexanone pyrandione;
exo selective;