Azide ring-opening-ring-closure reactions and tele-substitutions in vicinal azidopyrazole-, pyrrole- and indolecarboxaldehydes
摘要:
5-Chloro-1-methylpyrazole-4-carboxaldehydes 1 react with excess sodium azide in dimethyl sulfoxide to produce a mixture of 1-azidomethyl-4-cyanopyrazoles 2 and 4-cyano-5-hydroxy-1-methylpyrazoles 3. Application of this reaction to the corresponding 5-chloro-1-phenylpyrazole-4-carboxaldehydes 5 gave 4-cyano-5-hydroxy-1-phenyl-pyrazoles 7 as the sole products in high yields. Likewise, 2-aryl-5-chloro-1-methylpyrrole-3,4-dicarboxaldehydes 9 rearranged to 2-aryl-4-cyano-5-hydroxy-1-methylpyrrole-3-carboxaldehydes 10 in high yields. In the indole series, treatment of 1-aryl-2-chloroindole-3-carboxaldehydes 11 with NaN3 yielded a mixture of 1-aryl-3-cyano-2(3H)-indolones 13 and 1-aryl-5-azido-3-cyanoindoles 12, both products resulting from a ring-opening-ring-closure reaction with concomitant nucleophilic tele-substitution at the 5-position of the indole ring.
Microwave-Assisted Synthesis of Ethyl 1,3-Disubstituted-1,6-dihydropyrrolo[2,3-c]pyrazole-5-carboxylates
作者:Lijun Gu、Xiangguang Li
DOI:10.1002/jhet.1115
日期:2013.3
A novel series of ethyl 1,3‐disubstituted‐1,6‐dihydropyrrolo[2,3‐c]pyrazole‐5‐carboxylates can be rapidly and efficiently synthesized in excellent yields by condensing a variety of 1,3‐substituted‐4‐formyl‐5‐chloropyrazole with ethyl isocyanoacetate in the presence of 1‐methyl‐3‐butylimidazolium hydroxide under microwave irradiation. The simple experimental procedure, DMSO‐free condition, short period
通过缩合各种1,3-取代的-4--羟基化合物,可以快速有效地合成一系列新颖的1,3-二取代的-1,6-二氢吡咯并[2,3-c]吡唑-5-羧酸乙酯。在微波辐射下,在1-甲基-3-丁基咪唑鎓氢氧化物存在下,将甲酰基-5-氯吡唑与异氰基乙酸乙酯混合。简单的实验程序,无DMSO的条件,短的转化时间和优异的收率是本方法的优势。新型化合物的结构已通过IR,1 H NMR,13 C NMR,MALDI-TOF MS和元素分析得到证实。
Bi-functional complexes and methods for making and using such complexes
申请人:Gouliaev Alex Haahr
公开号:US11225655B2
公开(公告)日:2022-01-18
The present invention is directed to a method for the synthesis of a bi-functional complex comprising a molecule part and an identifier oligonucleotide part identifying the molecule part. A part of the synthesis method according to the present invention is preferably conducted in one or more organic solvents when a nascent bi-functional complex comprising an optionally protected tag or oligonucleotide identifier is linked to a solid support, and another part of the synthesis method is preferably conducted under conditions suitable for enzymatic addition of an oligonucleotide tag to a nascent bi-functional complex in solution.
BI-FUNCTIONAL COMPLEXES AND METHODS FOR MAKING AND USING SUCH COMPLEXES
申请人:Nuevolution A/S
公开号:EP2558577B1
公开(公告)日:2018-12-12
BI-FUNCTINAL COMPLEXES AND METHODS FOR MAKING AND USING SUCH COMPLEXES
申请人:Gouliaev Alex Haahr
公开号:US20130281324A1
公开(公告)日:2013-10-24
The present invention is directed to a method for the synthesis of a bi-functional complex comprising a molecule part and an identifier oligonucleotide part identifying the molecule part. A part of the synthesis method according to the present invention is preferably conducted in one or more organic solvents when a nascent bi-functional complex comprising an optionally protected tag or oligonucleotide identifier is linked to a solid support, and another part of the synthesis method is preferably conducted under conditions suitable for enzymatic addition of an oligonucleotide tag to a nascent bi-functional complex in solution.