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
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
The reactivity of organophosphorus compounds. Part XXX. Iminophospholes and a new synthesis of benzofurazans via intramolecular rearrangement of 1-o-nitroarylimino-1,2,5-triphenylphospholes
作者:J. I. G. Cadogan、Robert J. Scott、Robert D. Gee、Ian Gosney
DOI:10.1039/p19740001694
日期:——
1-aroylimino-1,2,5-triphenylphospholes (2; X = PhCO and p-NO2·C6H4CO), but these decomposed at this temperature to give the corresponding aryl cyanides and the phosphole oxide. The use of copper-bronze reduced the decomposition point of the dioxazolidin-2-ones sufficiently for the iminophospholes to be isolated. Base catalysed decomposition of ethyl N-(p-nitrophenylsulphonyloxy)carbamate (4) in the presence of
已经合成了一系列的N-取代的1-亚氨基-1,2,5-三苯基磷(2)。芳基,甲磺酰基,芳基磺酰基,乙氧基羰基,苯氧基羰基和二苯基次膦酰基叠氮化物与1,2,5-三苯基膦的反应得到相应的N-取代的1-亚氨基膦[2; X = Ar,MeSO 2,ArSO 2,EtO 2 C,PhO 2 C和Ph 2 P(O)],通过非亚硝基苯路线的收率很高。甲苯磺酰磷(2; X =甲苯磺酰基)也是通过无水氯胺-T反应制得的。与磷脂。苯甲酰叠氮化物通过分解反应,然后进行库尔修斯重排反应,而不是与相对较弱的亲核性1,2,5-三苯基磷脂反应(参见Ph 3 P)。缺电子的4-硝基苯甲酰基和2,4-二硝基苯甲酰基叠氮化物给出相应的1-芳基氨基-1,2,5-三苯基磷[2; X = C 6 H ^ 4 NO 2 - p和2,4-(NO 2)2 C ^ 6 ħ 3在6和55%的产率分别]。在铜存在下的5,7-二甲基四唑并[1,5-
One “Click” to Access Push-Triazole-Pull Fluorophores Incorporating a Pyrimidine Moiety: Structure-Photophysical Properties Relationships
Using copper-catalysed Huisgen 1,3-dipolar cycloaddition, we describe the synthesis of new A-π-D compounds containing a pyrimidinemoiety as π-acceptor (A) and various para-substituted benzene rings as donors (D). Structure–photophysicalpropertiesrelationships revealed the triazole ring to be a better π-conjugated linker than the triple bond.
We report, herein, the synthesis of new push–pull chromophores that incorporate a diazine ring as the electron-withdrawing part and an N,N-dimethylaniline moiety as the electron-donating part. Both of which are connected to a fluorene core. The length of the conjugated backbone was increased by incorporating ethynyl linkers and triazole rings on the both sides of the fluorene. The optical and two-photon
Copper-catalyzed alkyne cycloaddition on electron deficient azides via tetrazolo[1,5-a]pyrimidines
作者:Linda I. Nilsson、Anne Ertan、Dirk Weigelt、Jens M. J. Nolsöe
DOI:10.1002/jhet.449
日期:——
Tetrazolo[1,5‐a]pyrimidines are capable of serving as masked azides in copper‐catalyzed Huisgen cyclization with a variety of terminal alkynes, providing a simple protocol for the generation of novel 4′‐substituted 2‐(1′,2′,3′‐triazol‐1′‐yl)pyrimidines. J. Heterocyclic Chem., (2010).
Tetrazolo [1,5- a ]嘧啶在各种末端炔烃的铜催化的Huisgen环化反应中可用作掩蔽叠氮化物,为生成新型4'-取代的2-(1',2'提供了简单的方法,3'-三唑-1'-基)嘧啶。J.杂环化学。(2010)。
3-Pyridazinylnitrenes and 2-Pyrimidinylnitrenes
作者:Sebastian Torker、David Kvaskoff、Curt Wentrup
DOI:10.1021/jo4027897
日期:2014.2.21
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