176536-81-5Relevant academic research and scientific papers
Photoinitiated anti-Hydropentafluorosulfanylation of Terminal Alkynes
Birepinte, Mélodie,Champagne, Pier Alexandre,Paquin, Jean-Fran?ois
supporting information, (2021/11/30)
A photoinitiated anti-hydropentafluorosulfanylation of terminal alkynes using SF5Cl and (TMS)3SiH as the hydrogen atom donor is reported. This transformation generates selectively (Z)-(1-alken-1-yl)pentafluoro-λ6-sulfanes
Electron donor-acceptor (EDA)-complex enabled SF5Cl addition on alkenes and alkynes
Gilbert, Audrey,Birepinte, Mélodie,Paquin, Jean-Fran?ois
, (2021/02/03)
A new method for the addition of SF5Cl on unsaturated compounds was developed, based on the use of an electron donor-acceptor (EDA)-complex and visible light irradiation. The reaction does not require the presence of oxygen to proceed, compared
Graphene Oxide: An Efficient Acid Catalyst for the Construction of Esters from Acids and Alcohols
Chen, Zhengwang,Wen, Yuelu,Fu, Yejuan,Chen, Hai,Ye, Min,Luo, Guotian
supporting information, p. 981 - 985 (2017/05/05)
Graphene oxide was found to be an efficient and reusable acid catalyst for the esterification reaction. A wide range of aliphatic and aromatic acids and alcohols were compatible with the standard conditions and afforded the corresponding products in good yields. The heterogeneous catalyst can be easily recovered and recycled in dichloro-ethane solvent with good catalytic activity.
Efficient metathesis of terminal alkynes
Haberlag, Birte,Freytag, Matthias,Daniliuc, Constantin G.,Jones, Peter G.,Tamm, Matthias
supporting information, p. 13019 - 13022 (2013/03/13)
Despite remarkable recent advances in the development of well-defined homogeneous catalysts for alkyne metathesis with regard to their activity, functional-group tolerance, and required reaction temperature,[1] this method is largely limited to the use of internal alkynes, RC≡CR' (R=alkyl, aryl; R'≠6 H). Commonly, methyl-capped alkynes (R'=Me) are employed,[2] resulting in the formation of RC≡CR and volatile 2-butyne, which can be removed by evaporation (b.p.=278C) or adsorption on molecular sieves (MS 5 A)[3,4] to drive these equilibrium reactions to completion.[5] In contrast, terminal alkyne metathesis (TAM) has rarely been achieved,[2c, 6] since many high-oxidation-state, Schrock-type alkylidyne complexes are known to degrade in the presence of terminal alkyne substrates. For most cases, it was suggested that deactivation occurs through deprotonation of intermediate metallacyclobutadiene species with formation of " deprotiometallacycles" (DMCs),[7, 8] which can be stabilized and made isolable by addition of donor (Don) molecules (Scheme 1).[9] These DMCs can be regarded as containing a chelating alkynylalkylidene ligand, and it was proposed that such carbene complexes are responsible for the observed high activity towards the polymerization of terminal alkynes.[8b, 10] In addition, dimerization of methylidyne complexes [HC-MX3] and formation of dimetallatetrahedrane species [X3M- (m-C2H2)MX3] should be considered as an alternative deactivation path.
