An efficient entry to furo[2,3-d]pyrimidines via inverse electron demand Diels–Alder reactions of 2-aminofurans with 1,3,5-triazines
作者:Qun Dang、Yan Liu
DOI:10.1016/j.tetlet.2009.09.087
日期:2009.12
Furo[2,3-d]pyrimidines were readily prepared via an inverseelectrondemandDiels–Alder (IDA) reaction between 2-aminofurans and 1,3,5-triazines. 2-Aminofurans proved to be productive dienophiles leading to the IDA product in moderate to good yields. This study further expanded the scope of 1,3,5-triazine IDA reactions with five-membered aromatic heterocycles as dienophiles.
通过2-氨基呋喃与1,3,5-三嗪之间的电子反需求Diels-Alder(IDA)反应,可以轻松制备Furo [2,3- d ]嘧啶。事实证明2-氨基呋喃是生产性的亲二烯体,以中等至良好的产率产生了IDA产物。这项研究进一步扩大了五元芳香族杂环作为双亲物的1,3,5-三嗪IDA反应的范围。
MATERIALS FOR ORGANIC ELECTROLUMINESCENT DEVICES
申请人:Merck Patent GmbH
公开号:US20150270495A1
公开(公告)日:2015-09-24
The present invention relates to compounds according to formula (1), a method for producing these compounds and electronic devices, in particular organic electroluminescent devices containing said compounds.
The invention relates to the use of at least one specific triazine or melamine and/or salt thereof as accelerator for a photoinduced reaction of 3-(4-tert-butylphenyl)-3-hydroxy-1-(4-methoxyphenyl)-propan-1-one, 1-(4-tert-butylphenyl)-3-hydroxy-3-(4-methoxyphenyl)-propan-1-one or a mixture of these compounds to give avobenzone. The invention furthermore relates to a composition comprising at least one specific triazine or melamine and to a method for the stabilisation of the UV absorption capacity of a composition by means of a mixture of at least one specific triazine or melamine together with 3-(4-tert-butylphenyl)-3-hydroxy-1-(4-methoxyphenyl)propan-1-one, 1-(4-tert-butylphenyl)-3-hydroxy-3-(4-methoxyphenyl)propan-1-one or a mixture of these compounds, particularly preferably together with 3-(4-tert-butylphenyl)-3-hydroxy-1-(4-methoxyphenyl)propan-1-one.
The invention relates to novel compounds of the formula I, II; III or IV
wherein the general symbols are as defined in claim
1.
These compounds are useful as surface modifiers for polymers in order to improve resistance to fog formation or water and oil repellency.
A reversible thermochromic system comprising a) a compound of the formula (I) or a tautomer thereof (I) wherein R
1
is C
1
-C
18
alkyl, C
2
-C
18
alkenyl, C
3
-C
12
cycloalkyl, C
3
-C
12
cycloalkyl substituted by 1, 2 or 3 C
1
-C
4
alkyl; or C
7
-C
12
phenylalkyl; R
2
and R
3
are hydrogen or R
2
and R
3
together form a group —CH═CH—CH═CH—; and R
4
is hydrogen, —NO
2
, —SO
2
—R
1
or (4-nitrophenyl)azo; and b) a compound containing a group of the formula (II).