[(η6-p-cym)Ru(μ-Cl)}2Cl2], with corresponding 1,2,4-triazolo[1,5-a]pyrimidine ligands (L), namely, L-1,2,4-triazolo[1,5-a]pyrimidine (tp) (1), 5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine (dmtp) (2), 5,7-ditertbutyl-1,2,4-triazolo[1,5-a]pyrimidine (dbtp) (3), 7-isobutyl-5-methyl-1,2,4-triazolo[1,5-a]pyrimidine (ibmtp) (4), and 5,7-diphenyl-1,2,4-triazolo[1,5-a]pyrimidine (dptp) (5). The complexes were prepared
一系列中性半夹心有机金属钌(II)通式[(η的配合物6 -对- CYM)的Ru(L)氯2 ],其中,η 6 -对- CYM -对甲基异丙基苯,制备由二氯化对甲基异丙基苯合钌(II)二聚物的直接反应,[(η 6 -对- CYM)的Ru(μ-Cl)的} 2氯2 ],与对应的1,2,4-三唑并〔1,5 - a ]嘧啶配体(L),即L-1,2,4-三唑[1,5- a ]嘧啶(tp)(1),5,7-二甲基-1,2,4-三唑[1, 5- a ]嘧啶(dmtp)(2),5,7-二叔丁基-1,2,4-三唑[1,5- a ]嘧啶(dbtp)(3),7-异丁基-5-甲基-1,2,4-三唑并[1,5- a ]嘧啶(ibmtp)(4)和5,7-二苯基-1,2,4-三唑并[1,5 -一个]嘧啶(DPTP)(5)。以1:2的摩尔比制备配合物((1)除外,其中使用了过量的tp)。配合物的结构通过多核磁共振(1 H,13
Synthesis of New [1,2,4]Triazolo[1,5-<i>a</i>
]pyrimidine Derivatives: Reactivity of 3-Amino[1,2,4]triazole towards Enaminonitriles and Enaminones
作者:Abdulaziz Alnajjar、Mervat Mohammed Abdelkhalik、Mohamed Abdelmonem Raslan、Solwan Maher Ibraheem、Kamal Usef Sadek
DOI:10.1002/jhet.3222
日期:2018.7
A diversity of new 7‐substituted[1,2,4]triazolo[1,5‐a]pyrimidine and 6‐substituted[1,2,4]triazolo[1,5‐a]pyrimidine‐7‐amine derivatives has been synthesized via reaction of 3‐amino‐[1,2,4]triazole with enaminonitriles and enaminones. The regio orientation and the structure of the products were confirmed by spectral and analytical data and synthesis via an alternative route. The procedure proved to be
已经开发了多种新的7-取代的[1,2,4]三唑[1,5- a ]嘧啶和6-取代的[1,2,4]三唑[1,5 - a ]嘧啶-7-胺衍生物通过3-氨基[1,2,4]三唑与烯胺腈和烯胺酮的反应合成。产物的区域取向和结构通过光谱和分析数据以及通过另一种途径的合成得到证实。该方法被证明是简单,有效和高收率的,并且获得了[1,2,4]三唑并[1,5- a ]嘧啶的多样性。
Studies with Functionally Substituted Enamines: The Reactivity of Enaminals and Enamino Esters toward Naphthoquinone, Hydrazonoyl Halides, Aminoazoles and Hippuric Acid
作者:Saad Makhseed、Balkis AL-Saleh、Huwaida M. Hassaneen、Mohamed Hilmy Elnagdi
DOI:10.1055/s-2005-921750
日期:——
yield benzoindole derivatives 7. Enamine 1b reacts with hydrazonoyl halides 8 to yield 3,4-disubstituted pyrazoles 12. On the other hand, the enaminal la failed to react with 8, while enamine ester 1c afforded hydrazone 16 on treatment with 8. The enamino ester 1b afforded triethyl 1,3,5-benzenetricarboxylates on refluxing in acetic acid.
Direct (het)arylation of [1,2,4]triazolo[1,5- a ]pyrimidines: Both eliminative and oxidative pathways
作者:Nikolay A. Rasputin、Nadezhda S. Demina、Roman A. Irgashev、Gennady L. Rusinov、Oleg N. Chupakhin、Valery N. Charushin
DOI:10.1016/j.tet.2017.07.042
日期:2017.9
(Hetero)arylation of [1,2,4]triazolo[1,5-a]pyrimidine through the direct nucleophilic CH functionalization of the C-7 and C-5 positions has been implemented. The regioselectiveaddition of a (het)aryl magnesium bromide to C-7 of 6-bromo-[1,2,4]triazolo[1,5-a]pyrimidine, followed by eliminative aromatization of the intermediate σH-adducts, has afforded 7-(hetero)aryl-substituted [1,2,4]triazolo[1,5-a]pyrimidines
[1,2,4]三唑并[1,5- a ]嘧啶的(杂)芳基化是通过C-7和C-5位置的直接亲核C H官能化实现的。区域选择性加入(杂)芳基溴化镁来的6-溴- [1,2,4]三唑并[1,5-C-7一]嘧啶,随后通过中间σ的消除性芳构ħ -adducts,具有得到7-(杂)芳基取代的[1,2,4]三唑并[1,5- a ]嘧啶(小号ñH反应,按照“加法消除”方案进行)。与格氏试剂的第二治疗导致了C-5σ ħ -adducts,这已被氧化,同时ñ -镁的盐为[1,2,4]三唑并[1,5一]嘧啶类,轴承的各种组合C-5和C-7(小号ñH过程,通过“加成-氧化”方案实现)。作为光学和电化学研究的结果,已证明所获得的化合物是有前途的发光染料和推挽系统。
Differentiation between [1,2,4]triazolo[1,5-a] pyrimidine and [1,2,4]triazolo[4,3-a]- pyrimidine regioisomers by 1H15N HMBC experiments
作者:Antonio Salgado、Carmen Varela、Ana María García Collazo、Paolo Pevarello
DOI:10.1002/mrc.2634
日期:——
with either a 3-amino-[1,2,4]-triazole or a 3,5-diamino-[1,2,4]-triazole precursor was studied. In agreement with previous reports, two different bicycles, namely, bearing the regioisomeric [1,2,4]triazolo[1,5-a]pyrimidine (1) or [1,2,4]triazolo[4,3-a]pyrimidine (2) structural surrogates, could be obtained. We found that, depending on the triazole precursor, only one regioisomer resulted, either of the