Synthesis of Novel Enantiopure Fluorinated Building Blocks from Acyclic Chiral Allylsilanes
摘要:
Homochiral,beta-fluorinated gamma,delta-unsaturated carboxylic acids with an allylic fluorinated stereogenic center are available from the corresponding enantiopure allylsilanes. The key step for introduction of the fluorine substituent is an electrophilic fluorodesilylation reaction carried out in the presence of Selectfluor. Reduction of the resulting beta-fluorinated pentenoic acid into the corresponding fluorinated alcohol was also performed leading to the formation of an enantiopure second-generation fluorinated building block.
Compounds of formula (II), (IIIa) or (IIIb)
(variables are described in the specification) are prepared by fluorination of β,γ-unsaturated alkyl silanes. These compounds are useful as building blocks in the pharmaceutical industry.
Synthesis of Novel Enantiopure Fluorinated Building Blocks from Acyclic Chiral Allylsilanes
作者:Matthew Tredwell、Kenny Tenza、M Carmen Pacheco、Véronique Gouverneur
DOI:10.1021/ol0518535
日期:2005.9.1
Homochiral,beta-fluorinated gamma,delta-unsaturated carboxylic acids with an allylic fluorinated stereogenic center are available from the corresponding enantiopure allylsilanes. The key step for introduction of the fluorine substituent is an electrophilic fluorodesilylation reaction carried out in the presence of Selectfluor. Reduction of the resulting beta-fluorinated pentenoic acid into the corresponding fluorinated alcohol was also performed leading to the formation of an enantiopure second-generation fluorinated building block.