Provided is a method for producing a tetrafluoro nitrogen-containing heterocyclic compound such as tetrafluoropyrrolidine in good yield and at low cost. The method comprises the steps of:
(A) reacting a compound represented by the formula (I) with fluorine gas to produce a tetrafluoro compound represented by the formula (II),
(B) converting the tetrafluoro derivative represented by the formula (II) to a compound represented by the formula (III), and
(C) reacting the compound represented by the formula (III) with an amine compound represented by the formula NH2R9 to produce a tetrafluoro nitrogen-containing heterocyclic compound represented by the formula (IV) or salt thereof.
Jackson, W. Roy; Perlmutter, Patrick; Smallridge, Andrew J., Australian Journal of Chemistry, 1988, vol. 41, # 2, p. 251 - 261
作者:Jackson, W. Roy、Perlmutter, Patrick、Smallridge, Andrew J.
DOI:——
日期:——
A Ru Catalyzed Addition of Alkenes to Alkynes
作者:Barry M. Trost、Adriano F. Indolese、Thomas J. J. Mueller、Bjoern Treptow
DOI:10.1021/ja00107a005
日期:1995.1
The potential of the Alder ene reaction which possesses high atom economy is not realized because of limitations of scope and selectivity. Thus, the thermal bimolecular addition of unactivated alkenes to unactivated alkynes has not been reported. This addition now becomes possible through the advent of ruthenium catalysis. Several ruthenium complexes are effective including (PhOCH(3))(Ph(3)P)RuCl2, (p-cymene)(Ph(3)P)RuCl2, (p-cymene)[(C4H9)(3)P]RuCl2, and CpRu(COD)Cl, but the latter gives the highest conversions and regioselectivities. The reaction best proceeds in aqueous DMF at 100 degrees C or methanol at reflux. Both internal and terminal alkynes react. Monosubstituted alkenes are required. The reaction exhibits extraordinary chemoselectivity and control of product double bond geometry. A mechanism envisioning formation of a ruthenacyclopentene accounts for the experimental observations.
Butenolide Synthesis Based upon a Contra-Electronic Addition in a Ruthenium-Catalyzed Alder Ene Reaction. Synthesis and Absolute Configuration of (+)-Ancepsenolide
作者:Barry M. Trost、Thomas J. J. Muller
DOI:10.1021/ja00090a053
日期:1994.6
Lithium Bromide-Assisted Protection of Primary and Secondary Alcohols as Methoxymethyl Ethers using Dimethoxymethane
作者:Jean-Louis Gras、YOU-YAN Kong Win Chang、Anne Guerin