Synthesis of propargylic fluorides from allenylsilanes
作者:Laurence Carroll、M? Carmen Pacheco、Ludivine Garcia、V?ronique Gouverneur
DOI:10.1039/b610013a
日期:——
Allenylsilanes reacted at room temperature in acetonitrile with Selectfluor, an electrophilic fluorinating reagent, to give secondary propargylic fluorides in moderate to good yields; mechanistically, a side-product resulting from a 1,2-silyl shift testifies to the presence of a cationic intermediate.
Stereospecific anti SE2′ fluorination of allenylsilanes: synthesis of enantioenriched propargylic fluorides
作者:Laurence Carroll、Samantha McCullough、Tom Rees、Timothy D. W. Claridge、Véronique Gouverneur
DOI:10.1039/b803888k
日期:——
The electrophilic fluorodesilylation of enantioenriched allenylsilanes proceeds with efficient transfer of chirality. The silylationâfluorination of propargylic alcohols occurs with overall retention of stereochemistry, a result consistent with a stereospecific anti SE2â² mechanism for the fluorination step.