Palladium-Catalyzed Direct Arylation of C(sp<sup>3</sup>)–H Bonds of α-Cyano Aliphatic Amides
作者:M. Damoder Reddy、E. Blake Watkins
DOI:10.1021/acs.joc.5b02138
日期:2015.11.20
Pd(OAc)2-catalyzed arylation of C(sp3)–H bonds in α-cyano-α-methyl aliphatic amides is achieved in the presence of 8-aminoquinoline, as a removable directing group, using Mn(OAc)2 and Na2CO3. The current strategy enables the placement of an aryl/heteroaryl group at the β-position of α-cyano aliphatic acids for the first time. Wide functional group tolerance and easily accessible starting materials
Pd(OAc)2催化的α-氰基-α-甲基脂肪族酰胺中C(sp 3)-H键的芳基化反应是通过使用Mn(OAc)2和8-氨基喹啉作为可移动的导向基团而实现的。 Na 2 CO 3。当前的策略使得首次能够将芳基/杂芳基基团放置在α-氰基脂族酸的β-位置。宽泛的官能团耐受性和易于获得的起始原料为芳基化的α-氰基酰胺的合成提供了有效的方案。此外,通过将它们有效转化为医学上重要的α,α-二烷基化酸和β-氨基酸衍生物,证明了产物的合成用途。
Higher alkyl esters of cyanoacetic acid
申请人:Creanova Inc.
公开号:US06271410B1
公开(公告)日:2001-08-07
C3-12 alkyl, substituted alkyl, alkenyl and cycloalkyl cyanoacetates are prepared by an efficient and simplified one-step process in which a small molar excess of the corresponding alcohol, i.e., C3-12 alkyl, substituted alkyl, alkenyl or cycloalkenyl alcohol is reacted with crystalline cyanoacetic acid, or a concentrated aqueous solution of cyanoacetic acid, in the presence of an acid catalyst, such as, for example, methanesulfonic acid, p-toluenesulfonic acid, sulfuric acid and phosphoric acid at a temperature in the range of from about 60° C. to about 150° C., in accordance with the following reaction:
CNCH2COOH+R—OH→(cat)CNCH2COOR+H2O (I)
where R is a C3-12 alkyl, substituted alkyl, alkenyl or cycloalkyl.
Conjugated Thiophenes Having Conducting Properties and Synthesis of Same
申请人:Skene G. William
公开号:US20070287842A1
公开(公告)日:2007-12-13
The present invention relates to conjugated oligomers and polymers comprising aromatic thiophene cores. The conjugated materials are obtained by simple and efficient condensation of an aryl diamine and an aryl dialdehyde or a bifunctional aryl moiety comprising both an aldehyde and an amine. Condensation of the complementary moieties at temperatures ranging from ambient to refluxing temperatures in various solvents resulted in conjugated oligomers and polymers that can subsequently be cast into thin films. Oligomerization and polymerization can be done under mild conditions with removal of the resulting water bi-product responsible for shifting the equilibrium in favour of the conjugated products. The resulting conjugated compounds can be made conducting with dopants affording electrically conducting materials of either p-type or n-type conductors depending on the dopant selected.
CONJUGATED THIOPHENES HAVING CONDUCTING PROPERTIES AND SYNTHESIS OF SAME
申请人:Skene William G.
公开号:US20120004386A1
公开(公告)日:2012-01-05
The present invention relates to conjugated oligomers and polymers comprising aromatic thiophene cores. The conjugated materials are obtained by simple and efficient condensation of an aryl diamine and an aryl dialdehyde or a bifunctional aryl moiety comprising both an aldehyde and an amine. Condensation of the complementary moieties at temperatures ranging from ambient to refluxing temperatures in various solvents resulted in conjugated oligomers and polymers that can subsequently be cast into thin films. Oligomerization and polymerization can be done under mild conditions with removal of the resulting water bi-product responsible for shifting the equilibrium in favour of the conjugated products. The resulting conjugated compounds can be made conducting with dopants affording electrically conducting materials of either p-type or n-type conductors depending on the dopant selected.
Conjugated thiophenes having conducting properties and synthesis of same
申请人:Université de Montréal
公开号:US08034895B2
公开(公告)日:2011-10-11
The present invention relates to conjugated oligomers and polymers comprising aromatic thiophene cores. The conjugated materials are obtained by simple and efficient condensation of an aryl diamine and an aryl dialdehyde or a bifunctional aryl moiety comprising both an aldehyde and an amine. Condensation of the complementary moieties at temperatures ranging from ambient to refluxing temperatures in various solvents resulted in conjugated oligomers and polymers that can subsequently be cast into thin films. Oligomerization and polymerization can be done under mild conditions with removal of the resulting water bi-product responsible for shifting the equilibrium in favor of the conjugated products. The resulting conjugated compounds can be made conducting with dopants affording electrically conducting materials of either p-type or n-type conductors depending on the dopant selected.