Synthesis of Dibenzo[<i>b</i>,<i>f</i>]silepins with a Benzoquinolyl Ligand

A benzo[<i>h</i>]quinolyl ligand provided pentacoordinate character for silicon in dibenzo[<i>b,f</i>]silepins. Substituents on the silicon center determined both conformations of the dibenzosilepin and luminescence properties in relation to charge transfer

Synthesis of Dibenzo[<i>b</i>,<i>f</i>]silepins with a Benzoquinolyl Ligand

A benzo[<i>h</i>]quinolyl ligand provided pentacoordinate character for silicon in dibenzo[<i>b,f</i>]silepins. Substituents on the silicon center determined both conformations of the dibenzosilepin and luminescence properties in relation to charge transfer

Synthesis of Dibenzo[<i>b</i>,<i>f</i>]silepins with a Benzoquinolyl Ligand

A benzo[<i>h</i>]quinolyl ligand provided pentacoordinate character for silicon in dibenzo[<i>b,f</i>]silepins. Substituents on the silicon center determined both conformations of the dibenzosilepin and luminescence properties in relation to charge transfer

Palladium/ClickFerrophos-Catalyzed Asymmetric Domino Allylstannylation–Heck Reaction of <i>o</i>‑Formylaryl Triflate

Asymmetric domino allylstannylation–Heck reaction of <i>o</i>-formylaryl triflates was successively catalyzed by Pd/ClickFerrophos to give the 3-methylene-indan-1-ols in good yields with good to excellent enantioselectivities. The benefit of the reaction is that the starting <i>o</i>-formylaryl triflates are prepared from easily accessible salicylaldehyde derivatives, and the variation of the product, chiral 3-methylene-indan-1-ols, can be expanded. The reaction with 4-substituted substrates gave the corresponding 3-methylene-indan-1-ols in good yields with high enantioselectivities, whereas the reaction with 5- and 6-substituted substrates occasionally afforded the corresponding Stille coupling product in significant amounts along with the desired 3-methylene-indan-1-ols

Palladium/ClickFerrophos-Catalyzed Asymmetric Domino Allylstannylation–Heck Reaction of <i>o</i>‑Formylaryl Triflate

Asymmetric domino allylstannylation–Heck reaction of <i>o</i>-formylaryl triflates was successively catalyzed by Pd/ClickFerrophos to give the 3-methylene-indan-1-ols in good yields with good to excellent enantioselectivities. The benefit of the reaction is that the starting <i>o</i>-formylaryl triflates are prepared from easily accessible salicylaldehyde derivatives, and the variation of the product, chiral 3-methylene-indan-1-ols, can be expanded. The reaction with 4-substituted substrates gave the corresponding 3-methylene-indan-1-ols in good yields with high enantioselectivities, whereas the reaction with 5- and 6-substituted substrates occasionally afforded the corresponding Stille coupling product in significant amounts along with the desired 3-methylene-indan-1-ols

Synthesis of π‑Conjugated Polymers Containing Benzodipyrrole Moieties in the Main Chain through Cleavage of C–H Bonds in 1,4-Bis(acetylamino)benzene

Rhodium-catalyzed copolymerization between 1,4-bis­(acetylamino)­benzene and diynes through C–H bond cleavage afforded π-conjugated polymers containing benzodipyrrole moieties. The polymers with substituted benzene units exhibited nearly the same absorption peaks and HOMO levels. Fluorenone and benzothiadiazole moieties can be also introduced as electron-acceptor units to the main chain by polymerization in <i>tert</i>-amyl alcohol and tetrahydropyran as mixed solvent, leading to absorption at longer wavelength

Copper- and Silver-Catalyzed Diastereo- and Enantioselective Conjugate Addition Reaction of 1‑Pyrroline Esters to Nitroalkenes: Diastereoselectivity Switch by Chiral Metal Complexes

<i>syn</i>-Diastereoselective conjugate addition of 1-pyrroline esters to nitroalkenes in good yields with an excellent enantioselectivity by using CuOAc/Me-FcPHOX catalyst in the presence of pyridine. In contrast, AgOAc/<i>t</i>Bu-ThioClickFerrophos catalyzed the <i>anti</i> diastereoselective conjugate addition with a high enantioselectivity without additional base. Thus, the preparation of chiral 1-pyrroline derivatives bearing diverse stereochemistry could be achieved. The diastereoselective reduction of the imine group in the conjugate adduct could afford the 2,5-<i>cis</i>-proline ester derivative

Silver/ThioClickFerrophos Complex as an Effective Catalyst for Asymmetric Conjugate Addition of Glycine Imino Ester to Unsaturated Malonates and α‑Enones

The AgOAc/ThioClickFerrophos complex effectively catalyzed the conjugate addition of glycine imino esters to arylidene and alkylidene malonates, furnishing the corresponding adducts in good yields with high enantioselectivities, in the presence or absence of an external base. The complex also catalyzed conjugate addition to α-enones in the presence of 1,4-diazabicyclo[2.2.2]octane with high enantioselectivity, with formation of a small amount of cycloadducts

Copper- and Silver-Catalyzed Diastereo- and Enantioselective Conjugate Addition Reaction of 1‑Pyrroline Esters to Nitroalkenes: Diastereoselectivity Switch by Chiral Metal Complexes

<i>syn</i>-Diastereoselective conjugate addition of 1-pyrroline esters to nitroalkenes in good yields with an excellent enantioselectivity by using CuOAc/Me-FcPHOX catalyst in the presence of pyridine. In contrast, AgOAc/<i>t</i>Bu-ThioClickFerrophos catalyzed the <i>anti</i> diastereoselective conjugate addition with a high enantioselectivity without additional base. Thus, the preparation of chiral 1-pyrroline derivatives bearing diverse stereochemistry could be achieved. The diastereoselective reduction of the imine group in the conjugate adduct could afford the 2,5-<i>cis</i>-proline ester derivative