2,3,3,3-Tetrafluoropropene (HFO-1234yf) as a CF<sub>3</sub>
-Building Block: Synthesis of Enol Ethers and Vinyl Sulfides
作者:Ben J. Murray、Ellis D. Ball、Antal Harsanyi、Graham Sandford
DOI:10.1002/ejoc.201901445
日期:2019.12.19
there have so far been few reported uses of this fluoroalkene in organic synthesis. Here we report our investigations into nucleophilic substitution reactions of HFO‐1234yf with alkoxide and thiolate derivatives. The regiochemistry of these transformations varies with conditions and we propose these reactions proceed viaaddition‐elimination with reversible formation of a carbanion intermediate. The
Applications of 2-Chloro-3,3,3-trifluoroprop-1-ene (HCFO-1233xf): A Rapid Entry to Various β-Substituted-trifluoromethyl-ethenes
作者:Daniel Meyer、Myriem El Qacemi
DOI:10.1021/acs.orglett.0c00931
日期:2020.5.1
An efficient base-promoted reaction of O-, N-, and S-nucleophiles with 2-chloro-3,3,3-trifluoprop-1-ene (HCFO-1233xf) is described providing access to various β-substituted-trifluoromethyl-ethenes under mild reaction conditions. Mechanistic investigations shed some light on the regio-, chemo-, and stereoselectivities observed. The olefins prepared represent attractive intermediates in chemical discovery:
ene, known as the environmentally benign fluorinated olefin recently employed for the car air-conditioning system, was proved to follow the addition–elimination sequence at its C2 position by the reaction of a variety of alkoxides, forming CF3-containing vinyl ethers in excellent yields.