Free Radical Additions Involving Fluorine Compounds. V. Reactions of 1,2-Dibromo-2-chloro- and 1,2-Dichloro-2-iodo-1,1,2-trifluoroethane with Fluoroölefins1
General method for iron-catalyzed multicomponent radical cascades–cross-couplings
作者:Lei Liu、Maria Camila Aguilera、Wes Lee、Cassandra R. Youshaw、Michael L. Neidig、Osvaldo Gutierrez
DOI:10.1126/science.abj6005
日期:2021.10.22
addition to vinyl boronates) with Grignard reagents. Then, we extended the scope of these radical cascades by developing a general and broadly applicable Fe-catalyzed multicomponent annulation–cross-coupling protocol that engages a wide range of π-systems and permits the practical synthesis of cyclic fluorous compounds. Mechanistic studies are consistent with a bisarylated Fe(II) species being responsible
过渡金属催化的交叉偶联反应是化学合成中应用最广泛的一些方法。然而,尽管铁 (Fe) 作为一种潜在的更便宜、更丰富、毒性更小的过渡金属催化剂具有显着优势,但其在多组分交叉偶联中的实际应用仍然很大程度上不成功。我们展示了 1,2-双(二环己基膦基)乙烷 Fe 催化的 α-硼基自由基(由选择性自由基加成到乙烯基硼酸盐产生)与格氏试剂的偶联。然后,我们通过开发一种通用且广泛适用的 Fe 催化多组分环化-交叉偶联方案扩展了这些自由基级联的范围,该方案涉及广泛的 π 系统并允许实际合成环状氟化合物。
Rearrangement of 3-Membered 1,1,2-Trifluorobromonium and Iodonium Ions and Comparison of Trifluorochloronium to Fluorocarbenium Ions
作者:Dale F. Shellhamer、Kevyn J. Davenport、Heidi K. Forberg、Matthew P. Herrick、Rachel N. Jones、Sean J. Rodriguez、Sunamita Sanabria、Nicole N. Trager、Ryan J. Weiss、Victor L. Heasley、Jerry A. Boatz
DOI:10.1021/jo800472e
日期:2008.6.1
halonium ionintermediates are 11 to 27 kcal/mol more stable than the three-membered-ring halonium ions or the open-ions A and E. The five-membered-ring intermediates lead to rearranged products. Rearranged products increase as the number-4 halogen (Z) becomes more nucleophilic (Z: Cl < Br < I). Open chloronium ions from ionic chlorination of terminal fluorovinyl alkenes are compared to the open ions generated
Replacement solvents having improved properties and methods of using the same
申请人:Grzyll R. Lawrence
公开号:US20060166851A1
公开(公告)日:2006-07-27
CFC replacement solvent compositions, methods of using the same and methods of making the same. These compositions meet or exceed the solvency, flammability, and compatibility requirements for CFC's while providing similar or improved environmental and toxicological properties. These solvent compositions have application including, but not limited to, oxygen handling, refrigeration or heat pumps, electronics, implantable prosthetic devices, and optical equipment.
Replacement Solvents Having Improved Properties and Methods of Using the Same
申请人:GRZYLL Lawrence R.
公开号:US20090026418A1
公开(公告)日:2009-01-29
CFC replacement solvent compositions, methods of using the same and methods of making the same. These compositions meet or exceed the solvency, flammability, and compatibility requirements for CFC's while providing similar or improved environmental and toxicological properties. These solvent compositions have applications including, but not limited to, oxygen handling, refrigeration or heat pumps, electronics, implantable prosthetic devices, and optical equipment.
PROCESS, PROPERTIES, AND APPLICATIONS OF GRAFT COPOLYMERS
申请人:Honeywell International Inc.
公开号:US20130184422A1
公开(公告)日:2013-07-18
Fluorinated macromonomers, a PCTFE-g-poly(M) graft copolymer, and moisture barrier films and articles formed therefrom are provided. The PCTFE-g-poly(M) graft copolymers have a PCTFE backbone component and a plurality of pendant groups attached to the PCTFE backbone component.