Synthesis of Isoquinoline Derivatives via Palladium‐Catalyzed C−H/C−N Bond Activation of
<i>N</i>
‐Acyl Hydrazones with
<i>α</i>
‐Substituted Vinyl Azides
A palladium‐catalyzed cyclization of N‐acetyl hydrazones with vinyl azides has been developed. Various substituted isoquinolines, including diverse fused isoquinolines can be prepared via this protocol in moderate to good yields. Mechanistic studies suggest that α‐substituted vinyl azide serves as an internal nitrogen source. Also, C−H bond activation and C−N bond cleavage have been realized using
basis of IR, 1H, 13C and 11B spectral data and EI mass spectrometry. Antimicrobial activities of the semicarbazone ligands and their boron derivatives were investigated against E. coli and P. aeruginosa bacteria and A. niger and P. peniculosum fungi. B(OPri)3 and the boron semicarbazone derivative [(4-C6H4Cl)C(CH3)NN:C(NH2)OB(OC6H4O)] were used as precursors to synthesize nanosized cubic B2O3 (A and B)
通过O C 6 H反应,合成了几种新的[(4-C 6 H 4 R)C(CH 3)N N:C(NH 2)O B(OC 6 H 4 O )]类型的硼衍生物。4 OB OPr i和LH [LH =(OH)C(NH 2)NN:C(CH 3)(4-C 6 H 4 R)],[其中R = H(L 1 H);CH 3(L 2 H);OCH 3(L 3 H);Cl(L 4 H); 溴(L 5H)]在甲苯回流下以1∶1的摩尔比。使用元素分析对所有这些新合成的配合物进行了表征,并根据红外光谱,1 H,13 C和11 B光谱数据以及EI质谱法提出了可能的结构。研究了半脲酮配体及其硼衍生物对大肠杆菌和铜绿假单胞菌细菌以及黑曲霉和青霉菌的抗菌活性。B(OPr i)3和半氨基甲硼烷衍生物[(4-C 6 H 4 Cl)C(CH 3)N N:C(NH 2)OB (OC 6 H 4 O )]被用作前体,通过溶胶-凝胶转化法分别合成纳米级立方B
Bekhazi, Michel; Smith, Peter J.; Warkentin, John, Canadian Journal of Chemistry, 1984, vol. 62, p. 1646 - 1652
作者:Bekhazi, Michel、Smith, Peter J.、Warkentin, John
DOI:——
日期:——
Anticonvulsant properties of various acetylhydrazones, oxamoylhydrazones and semicarbazones derived from aromatic and unsaturated carbonyl compounds
作者:Jonathan R Dimmock、Sarvesh C Vashishtha、James P Stables
DOI:10.1016/s0223-5234(00)00123-9
日期:2000.2
Various acetylhydrazones, oxamoylhydrazones and semicarbazones were prepared as candidate anticonvulsants with a view to examining the viability of a putative binding site hypothesis. Atomic charge calculations were undertaken to determine the hydrogen bonding capacities of various molecules. The biological results obtained revealed that in general the acetylhydrazones and semicarbazones afforded good