Direct Decarboxylative<i>Meta</i>-Selective Acylation of Arenes via an<i>Ortho</i>-Ruthenation Strategy
作者:Kun Jing、Zhong-Yuan Li、Guan-Wu Wang
DOI:10.1021/acscatal.8b03695
日期:2018.12.7
using Ru3(CO)12 as the catalyst and α-oxocarboxylic acids as the acylation source, featured broad substrate scope, good functional group tolerance, and high regioselectivity. Mechanistic studies demonstrated that a radical process and an 18e-octahedral ruthenium species were involved in this reaction. The present work provides a new strategy for the regioselective meta-acylation reactions and will
Reductive carboxylation of aromatic esters by electron transfer from magnesium metal
作者:Hirofumi Maekawa、Hikaru Okawara、Taro Murakami
DOI:10.1016/j.tetlet.2016.12.001
日期:2017.1
Magnesium-promoted reductive carboxylation of ethyl benzoate in the presence of chlorotrimethylsilane in N,N-dimethylformamide brought about a new carbon-carbon bond formation between the carbonyl carbon atom and carbon dioxide to give the corresponding benzoylformic acid in good yield. It is noteworthy that only ethyl benzoates with substituents at the meta-position were converted into benzoylformic
According to the invention there is provided a compound of formula A1 which may be useful in the treatment of a condition or disorder ameliorated by the inhibition of the A
1
-A
2b
or, particularly, the A
2a
receptor wherein the compound of formula A1 has the structure, wherein, A represents Cy
1
or Het
A
; Cy
1
represents a 5- to 14-membered aromatic, fully saturated or partially unsaturated carbocyclic ring system comprising one, two or three rings, which Cy
1
group is optionally substituted by one or more R
4a
substituents; Het
A
represents a 5- to 14-membered heterocyclic group that may be aromatic, fully saturated or partially unsaturated, and which contains one or more heteroatoms selected from O, S and N, which heterocyclic group may comprise one, two or three rings and which HetA group is optionally substituted by one or more R4b substituents; B represents a Cy
2
or Het
B
; Cy
2
represents a 3- to 10-membered aromatic, fully saturated or partially unsaturated carbocyclic ring system comprising one or two rings, which Cy
2
group is optionally substituted by one or more R
4c
substituents; Het
B
represents a 3- to 10-membered heterocyclic group that may be aromatic, fully saturated or partially unsaturated, and which contains one or more heteroatoms selected from O, S and N, which heterocyclic group may comprise one or two rings and which Het
B
group is optionally substituted by one or more R
4d
substituents.
According to the invention there is provided a compound of formula A1 which may be useful in the treatment of a condition or disorder ameliorated by the inhibition of the A1-A2b or, particularly, the A2a receptor wherein the compound of formula A1 has the structure, wherein, A represents Cy1 or HetA; Cy1 represents a 5- to 14-membered aromatic, fully saturated or partially unsaturated carbocyclic ring system comprising one, two or three rings, which Cy1 group is optionally substituted by one or more R4a substituents; HetA represents a 5- to 14-membered heterocyclic group that may be aromatic, fully saturated or partially unsaturated, and which contains one or more heteroatoms selected from O, S and N, which heterocyclic group may comprise one, two or three rings and which HetA group is optionally substituted by one or more R4b substituents; B represents a Cy2 or HetB; Cy2 represents a 3- to 10-membered aromatic, fully saturated or partially unsaturated carbocyclic ring system comprising one or two rings, which Cy2 group is optionally substituted by one or more R4c substituents; HetB represents a 3- to 10-membered heterocyclic group that may be aromatic, fully saturated or partially unsaturated, and which contains one or more heteroatoms selected from O, S and N, which heterocyclic group may comprise one or two rings and which HetB group is optionally substituted by one or more R4d substituents.
Composite polyamide membrane made via interfacial polymerization using a blend of non-polar solvents
申请人:Dow Global Technologies LLC
公开号:US10137418B2
公开(公告)日:2018-11-27
A method for making a composite polyamide membrane comprising a porous support and a thin film polyamide layer, wherein the method includes: i) applying a polar solution comprising a polyfunctional amine monomer, and a non-polar solution comprising a polyfunctional acyl halide monomer to a surface of a porous support and interfacially polymerizing the monomers to form a thin film polyamide layer, wherein the non-polar solution further comprises at least 50 vol % of a C5 to C20 aliphatic hydrocarbon and from 2 to 25 vol % of benzene or benzene substituted with one or more C1 to C6 alkyl groups; and ii) applying an aqueous solution of nitrous acid to the thin film polyamide layer.