Iridium-Catalyzed Highly Efficient and Site-Selective Deoxygenation of Alcohols
作者:Shiyi Yang、Weiping Tang、Zhanhui Yang、Jiaxi Xu
DOI:10.1021/acscatal.8b02495
日期:2018.10.5
An iridium-catalyzed, highly efficient, and site-selective deoxygenation of primary, secondary, and tertiary alcohols has been realized, under the assistance of a 4-(N-substituted amino)aryl directing group. Only the hydroxyl adjacent to the directing group can be deoxygenated. The deoxygenation is performed in water, with formic acid as both the promoter and hydride donor. Excellent yields and functionality
Nickel-Catalyzed Reductive Deoxygenation of Diverse C–O Bond-Bearing Functional Groups
作者:Adam Cook、Haydn MacLean、Piers St. Onge、Stephen G. Newman
DOI:10.1021/acscatal.1c03980
日期:2021.11.5
We report a catalytic method for the direct deoxygenation of various C–O bond-containing functional groups. Using a Ni(II) pre-catalyst and silane reducing agent, alcohols, epoxides, and ethers are reduced to the corresponding alkane. Unsaturated species including aldehydes and ketones are also deoxygenated via initial formation of an intermediate silylated alcohol. The reaction is chemoselective for
Novel routes to 4-substituted N,N-dialkylanilines, N-alkylanilines and anilines
作者:Alan R. Katritzky、Hengyuan Lang、Xiangfu Lan
DOI:10.1016/s0040-4020(01)87221-5
日期:1993.8
N-dialkylanilines, -N-alkylanilines, -anilines and some substituted analogs obtained via lithiation are converted by lithium aluminum hydride or Grignard reagents into 4-substituted N,N-dialkylanilines, N-alkylanilines and anilines, respectively, in good yields.
A photoresponsive device comprises s substrate (3), a hole blocking layer (15), an optional adhesive layer (6), an inorganic photogenerating layer (7), an organic photoconductive layer (9) sensitive to infra-red radiation, and a top coating (11) of a hole transport layer. More specifically, the present invention is directed to an improved photoresponsive device comprised in the order stated of the following layers: a conductive substrate (3), a metal oxide hole blocking layer (5), an adhesive layer (6), an inorganic photogenerating layer (7), a photoconductive composition (9) capable of enhancing or reducing the intrinsic properties of the photogenerating layer, which composition is selected from the group consisting or organic photoconductive compositions, charge transfer complex compositions, sensitizers, or mixtures thereof, and a hole transport (11). In an alternative embodiment, the positions of the photogenerating layer (7) and the photoconductive layer (9) are reversed.
Photoresponsive devices, including layered photoresponsive devices, comprised of a photoconductive layer of squaraine compositions of the structure:
wherein R1, R2, and R3 are alkyl or aryl substituents.