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Propargylations and dipolar cycloadditions with substituted silyl ethers
a All yields refer to isolated products after purification over silica gel. b All diastereomeric ratios were determined by 1H NMR analysis on crude material.
c The (Sa) enantiomer of the allenylsilane 1 was used for the propargylation reaction. dCycloaddition reaction run in chlorobenzene at 150 ºC.
