16529-06-9Relevant articles and documents
Cu(OAc)2-Mediated benzimidazole-directed C-H cyanation using 2-(4-methylpiperazin-1-yl)acetonitrile as the cyano source
Zhang, Tianyou,Qiao, Jingyi,Song, He,Xu, Feng,Liu, Xiaochong,Xu, Chunzhao,Ma, Junjie,Liu, Hao,Sun, Zhizhong,Chu, Wenyi
, p. 9084 - 9089 (2019)
A new protocol for the Cu(OAc)2-mediated cyanation of arenes using benzimidazole as the directing group with 2-(4-methylpiperazin-1-yl)acetonitrile as the cyano source was developed. A series of cyano derivatives were facilely and conveniently obtained in moderate to good yields by using this method. The C-H activation catalytic system was originally applied to the C(sp2)-H cyanation of the aryl/heteroaryl to synthesize 2-(1H-benzo[d]imidazol-2-yl)aryl nitriles. There were 19 new compounds in the synthesized 20 cyanide products. In this reaction, 2-(4-methylpiperazin-1-yl)acetonitrile as the cyano source was originally employed in the C(sp2)-H cyanation of the arenes. In addition, a fluorescent material 5a was obtained by derivative reactions of the obtained cyanide product 3.
Wavelength dependent photoextrusion and tandem photo-extrusion reactions of ninhydrin bis-acetals for the synthesis of 8-ring lactones, benzocyclobutenes and orthoanhydrides
George, Michael W.,Hanson-Heine, Magnus W. D.,Harrowven, David C.,Kayal, Surajit,Light, Mark E.,Raimbach, William A. T.,Sun, Wei,Sun, Xue-Zhong
, p. 1546 - 1549 (2022/02/14)
Ninhydrin bis-acetals give access to 8-ring lactones, benzocyclo-butenes and spirocyclic orthoanhydrides through photoextrusion and tandem photoextrusion reactions. Syntheses of fimbricalyxlactone B, isoshihunine and numerous biologically-relevant heteroc
SYNTHESIS METHOD OF IMIDAZOLES
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Paragraph 0098; 0099, (2019/05/15)
PROBLEM TO BE SOLVED: To provide benzimidazoles with small number of processes at high selectivity and high purity. SOLUTION: A synthesis method of benzimidazoles synthesizes at least one of an imidazole derivative and a carboxy imidazole derivative by reacting a diamine derivative and at least one of a dicarboxylic acid derivative and a dicarboxylic acid anhydride derivative in subcritical water or in supercritical water. For example, in subcritical water or in supercritical water, by reacting o-phenylene diamine and at least one of phthalic acid and phthalic anhydride, 2-phenylbenzimidazole and 2-o-benzimidazole benzoate are synthesized. SELECTED DRAWING: None COPYRIGHT: (C)2019,JPOandINPIT