3101-96-0Relevant articles and documents
The preparation and characterization of benzocyclobutenylidene-, naphtho[b]cyclobutenylidene-, and η2-benzocyclobutadiene-η5-cyclopentadienyldicarbonyliron hexafluorophosphate
Sanders, Andrea,Bauch, Thomas,Magatti, Charles V.,Lorenc, Carol,Giering, Warren P.
, p. 359 - 375 (1976)
The preparation and characterization of the first isolable cationic mononuclear complexes bearing a η2-cyclobutadienoid ligand or a carbene ligand lacking heteroatom stabilization are described. The reaction between 1-bromo-benzocyclobutene and Na[η5-C5H5(CO)2Fe] (NaFp) afforded η1-1-benzocyclobutenyl-η5-cyclopentadienyldicarbonyliron (III). Treatment of III with trityl hexafluorophosphate gave benzocyclobutenylidene-η5-cyclopentadienyldicarbonyliron hexafluorophosphate (V). Naphtho [b] cyclobutenylidene-η5-cyclopentadienyldicarbonyliron hexafluorophosphate (VI) was formed in an analogous manner. Both V and VI gave 1,1-disubstituted cyclobutenes when treated with nucleophilic reagents. η2-Benzocyclobutadiene-η5-cyclopentadienyldicarbonyliron hexafluorophosphate, (XIX), which was prepared by the oxidation of bis-1,2-(η5-cyclopentadienyldicarbonyliron)benzocyclobutene by trityl hexafluorophosphate, afforded trans-1,2-disubstituted benzocyclobutenes when treated with nucleophilic reagents. The η2-benzocyclobutadiene ligand of XIX was displaced by I- and trapped as the Diels--Alder adduct by 1,3-diphenylisobenzofuran.
Mechanism of Electrochemical Generation and Decomposition of Phthalimide-N-oxyl
Yang, Cheng,Farmer, Luke A.,Pratt, Derek A.,Maldonado, Stephen,Stephenson, Corey R. J.
, p. 10324 - 10332 (2021)
PhthalimideN-oxyl (PINO) is a potent hydrogen atom transfer (HAT) catalyst that can be generated electrochemically fromN-hydroxyphthalimide (NHPI). However, catalyst decomposition has limited its application. This paper details mechanistic studies of the
A Heterogeneous Pt-ReOx/C Catalyst for Making Renewable Adipates in One Step from Sugar Acids
Jang, Jun Hee,Ro, Insoo,Christopher, Phillip,Abu-Omar, Mahdi M.
, p. 95 - 109 (2021/01/12)
Renewable adipic acid is a value-added chemical for the production of bioderived nylon. Here, the one-step conversion of mucic acid to adipates was achieved in high yield through deoxydehydration (DODH) and catalytic transfer hydrogenation (CTH) by a bifunctional Pt-ReOx/C heterogeneous catalyst with isopropanol as solvent and reductant. The Pt-ReOx/C catalyst is reusable and was regenerated at least five times. The catalyst exhibits a broad substrate scope of various diols. Spectroscopic studies of Pt-ReOx/C revealed ReVII and Pt0 as the relevant species for DODH and CTH, respectively. Isotope labeling experiments support a monohydride mechanism for CTH over Pt. This work demonstrates a reusable bifunctional catalyst for a one-step valorization of sugar acids to a practical monomer, which opens the door to multifunctional catalysis streamlining valorization of biomass-derived molecules.
Gold-Catalyzed Friedel–Crafts-Like Reaction of Benzylic Alcohols to Afford 1,1-Diarylalkanes
Oakley, James V.,Stanley, Tyler J.,Jesse, Kate A.,Melanese, Amanda K.,Alvarez, Araceli A.,Prince, Aloha L.,Cain, Stephanie E.,Wenzel, Anna G.,Iafe, Robert G.
supporting information, p. 7063 - 7066 (2019/11/14)
A gold-catalyzed, Friedel–Crafts-like benzylation of unactivated benzylic alcohols to form 1,1-diarylalkanes has been developed. The operationally convenient method uses only 1.3 equivalents of the electron-rich arene, employs readily available starting m