A synthesis of diketones from carbonyl compounds and α,ω-dichloro-α,ω-disulfinylalkanes with two carbon–carbon bond-formation via bis-sulfinyloxiranes
摘要:
Bis-sulfinyloxiranes were synthesized in two steps from carbonyl compounds and alpha,omega-dichloro-alpha,omega-disulfinylalkanes, which were synthesized from alpha,omega-dibromoalkanes in three steps, in good yields. Treatment of the bis-sulfinyloxiranes with sodium benzenethiolate and piperidine gave alpha,alpha'-di(phenylthio) diketones and alpha,alpha'-diamino diketones, respectively, in high yields. From these products, some kinds of diketones were synthesized in good to high yields. (C) 2002 Elsevier Science Ltd. All rights reserved.
Synthesis of α,ω‐Bis‐Enones by the Double Addition of Alkenyl Grignard Reagents to Diacid Weinreb Amides
作者:Stefan Wiesler、Michael A. Bau、Thomas Niepel、Sara L. Younas、Hieu‐Trinh Luu、Jan Streuff
DOI:10.1002/ejoc.201901043
日期:2019.9.30
The synthesis of bis‐enones from alkenyl bromides and α,ω‐bis‐Weinreb amides via a double Grignard reaction is reported. The work contains reliable protocols for the double addition and the efficient generation of the required substituted alkenyl Grignard reagents from alkenyl bromide precursors.
Enhanced Enantioselectivity of Molecularly Imprinted Polymers Formulated with Novel Cross-Linking Monomers
作者:Martha Sibrian-Vazquez、David A. Spivak
DOI:10.1021/ma025710z
日期:2003.7.1
To enhance the performance of molecularly imprinted polymers (MlPs), three new cross-linking monomers were designed, synthesized, and evaluated as matrix elements for molecularly imprinted polymers. Hybrid cross-linking monomers incorporating methacrylamide/methacrylate (NOBE), vinyl ketone/methacrylamide (NAG), and vinyl ketone/methacrylate (MVK) polymerizable groups, were synthesized and used to prepare MIPs and compared to a traditional MIP formulated with EGDMA. The resulting macroporous MIPs were evaluated by HPLC for their ability to separate the enantiomers of a chiral template. The MIP formulated with the cross-linking monomer NAG showed the highest enantioselectivity and complete baseline resolution for a racemic mixture of the template. Enhancement in selectivity in this MIP may be attributed to the presence of the amide group which can promote hydrogen bonding via favorable 1,3 donor-acceptor interactions with the template, the morphology of the polymeric material obtained due to differences in reactivity between the polymerizable groups and improved resolution in cavity formation as a consequence of shorter cross-linker size.
LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR MANUFACTURING THE SAME
申请人:DIC CORPORATION
公开号:US20160230096A1
公开(公告)日:2016-08-11
A liquid crystal display device with few drop marks left during manufacture is provided without degrading the image-sticking characteristics of the liquid crystal display device or other characteristics fundamental to liquid crystal display devices, such as dielectric anisotropy, viscosity, upper nematic phase temperature limit, and rotational viscosity (γ
1
), and a method for manufacturing such a liquid crystal display device is also provided. A liquid crystal display device
10
according to the present invention includes a first substrate
11
, a second substrate
12
, a liquid crystal composition layer
13
disposed therebetween, and vertical alignment layers
16
and
17
containing a polymer of a monofunctional reactive-group-containing polymerizable compound and a polyfunctional reactive-group-containing polymerizable compound.
US8741291B2
申请人:——
公开号:US8741291B2
公开(公告)日:2014-06-03
A synthesis of diketones from carbonyl compounds and α,ω-dichloro-α,ω-disulfinylalkanes with two carbon–carbon bond-formation via bis-sulfinyloxiranes
Bis-sulfinyloxiranes were synthesized in two steps from carbonyl compounds and alpha,omega-dichloro-alpha,omega-disulfinylalkanes, which were synthesized from alpha,omega-dibromoalkanes in three steps, in good yields. Treatment of the bis-sulfinyloxiranes with sodium benzenethiolate and piperidine gave alpha,alpha'-di(phenylthio) diketones and alpha,alpha'-diamino diketones, respectively, in high yields. From these products, some kinds of diketones were synthesized in good to high yields. (C) 2002 Elsevier Science Ltd. All rights reserved.