作者:Logan Audiger、Kevin Watts、Simon C. Elmore、Richard I. Robinson、Thomas Wirth
DOI:10.1002/cssc.201100372
日期:2012.2.13
Flow me a Ritter: Ritterreactions are performed in a simple microreactor setup using tert‐butylacetate as versatile carbocation source. The protocol avoids the handling of large amounts of hot concentrated sulfuric acid as low concentrations are optimal for rapid access tert‐butyl‐ or diphenylmethyl‐protected amides.
Further SAR studies on bicyclic basic merbarone analogues as potent antiproliferative agents
作者:Andrea Spallarossa、Chiara Rotolo、Claudia Sissi、Giuseppe Marson、Maria Laura Greco、Angelo Ranise、Paolo La Colla、Bernardetta Busonera、Roberta Loddo
DOI:10.1016/j.bmc.2013.08.056
日期:2013.11
Pyrimidopyrimidine derivatives 1 were prepared as rigid thioanalogues of merbarone (a catalytic topoisomerase II inhibitor) and screened as antiproliferative agents against different tumor cell lines. A number of the synthesized compounds emerged as cytotoxic in cell-based assays (MT-4, HeLa and MCF-7 cells) at low micromolar concentrations. In a National Cancer Institute screening, selected member
Synthesis, Characterization, and Antibacterial and Anti-Inflammatory Activities of New Pyrimidine and Thiophene Derivatives
作者:Siham Lahsasni、Dunya A. M. Al-Hemyari、Hazem A. Ghabbour、Yahia Nasser Mabkhoot、Fadilah S. Aleanizy、Asma A. Alothman、Zainab M. Almarhoon
DOI:10.1155/2018/8536063
日期:2018.8.1
nucleophilic addition to a nitrile group to form the oxazinimine ring. 1-(3-cyano-substituted[b]thiophen-2-yl)-3-(4-(trifluoromethyl)phenyl)thiourea derivatives (6a–c) were obtained via reaction of the starting compounds (2d–f) and 4-(trifluoromethyl phenyl)isothiocyanate. The lead compounds (2d–f) rapidly reacted with 4-(trifluoromethyl)benzaldehyde or 4-(2-pyridyl)benzaldehyde in acidic medium to yield
Mild flash vacuum thermolysis of tetrazolo[1,5-b]pyridazines 8T generates small amounts of 3-azidopyridazines 8A (8aA, IR 2145, 2118 cm–1; 8bA, 2142 cm–1). Photolysis of the tetrazoles/azides 8T/8A in Ar matrix generates 3-pyridazinylnitrenes 9, detected by ESR spectroscopy (9a: D/hc = 1.006; E/hc = 0.003 cm–1). Cyanovinylcarbenes 11, derived from 4-diazobut-2-enenitriles 10, are also detected by ESR
四唑并[1,5- b ]哒嗪8T的温和快速真空热解会生成少量的3-叠氮基哒嗪8A(8aA,IR 2145,2118 cm –1;8bA,2142 cm –1)。在Ar基质中对四唑/叠氮化物8T / 8A进行光解会生成3-吡啶并氮杂氮基9,通过ESR光谱法检测到(9a:D / hc = 1.006;E / hc = 0.003 cm –1)。Cyanovinylcarbenes 11,由4- diazobut -2- enenitriles衍生10,也可以通过ESR光谱法检测(11a:D / hc = 0.362;E / hc = 0.021 cm –1)。卡宾11重排为氰基亚勒烯12和3-氰基环丙烯13。在8的光解中未观察到三氮杂七庚烯20。在254 nm的Ar矩阵中对四唑并[1,5- a ]嘧啶/ 2-叠氮基吡啶18T / 18A进行光解可得到2-嘧啶基亚硝酸19,可通过ESR,UV和IR光谱法观察到(19a:ESR:D