Synthesis of functionalized triazolo[1,5-a]pyrimidine derivatives
作者:Natal’ya V. Chechina、Nadezhda N. Kolos、Irina V. Omelchenko、Vladimir I. Musatov
DOI:10.1007/s10593-018-2230-1
日期:2018.1
New triazolo[1,5-a]pyrimidines containing aroyl and acetyl or ester groups in the pyrimidine ring were synthesized in a process related to the Biginelli-like reaction, using hydrates of arylglyoxals, β-dicarbonyl compounds, and 1H-1,2,4-triazol-5-amine. Reaction was carried out in either sequential or one-pot procedure.
使用芳基乙二醛,β-二羰基化合物和1 H -1的水合物,按照与Biginelli样反应相关的方法,合成了在嘧啶环中含有芳酰基和乙酰基或酯基的新三唑并[1,5- a ]嘧啶, 2,4-三唑-5-胺。反应以顺序或一锅法进行。
Phosphine-catalyzed divergent domino processes between γ-substituted allenoates and carbonyl-activated alkenes
作者:Mingyue Wu、Zhaobin Han、Huanzhen Ni、Nengzhong Wang、Kuiling Ding、Yixin Lu
DOI:10.1039/d1sc06364b
日期:——
Highly enantioselective and chemodivergent domino reactions between γ-substituted allenoates and activated alkenes have been developed.
已经开发出高度对映选择性和化学多样性的多米诺反应,该反应涉及γ取代的烯酸酯和活性烯烃之间的反应。
Catalyst-free racemic and H<sub>2</sub>O/CPA-catalyzed asymmetric regio-reversed domino processes of triketone enones with azlactones
作者:Yun-Dong Fu、Xiang Gao、Shi-Kun Jia、Xiao Xiao、Min-Can Wang、Lihua Huang、Guang-Jian Mei
DOI:10.1039/d3gc01445b
日期:——
Regio-reversed domino processes of triketone enones with azlactones have been established. Opposite to the previous β-addition-triggered domino processes, this protocol is initiated by a regio-reversed α-addition. Under catalyst-free conditions, the dominoreaction readily occurred, leading to the formation of a variety of bicyclic furofurans bearing vicinal quaternary carbons in good to excellent
Diastereodivergent and Regioselective Synthesis of Tetrahydrofuro[2,3-<i>b</i>]furans with Four Consecutive Stereocenters
作者:Jing Zhang、Wen-Na Sun、Zhiwei Jiang、Shi-Kun Jia、Guang-Jian Mei
DOI:10.1021/acs.joc.4c00069
日期:2024.3.15
Base-catalyzed diastereodivergent and regioselective domino processes of triketone enones with arylacetaldehydes for the synthesis of tetrahydrofuro[2,3-b]furans with four consecutive stereocenters are reported. Good yields and diastereoselectivities are obtained when DBU is employed as a catalyst; in contrast, Et3N delivers a different diastereomer in excellent diastereoselectivity. This work offers
报道了三酮烯酮与芳基乙醛的碱催化非对映发散和区域选择性多米诺过程,用于合成具有四个连续立体中心的四氢呋喃并[2,3- b ]呋喃。使用DBU作为催化剂可以获得良好的产率和非对映选择性;相比之下,Et 3 N 则以优异的非对映选择性提供不同的非对映异构体。这项工作具有许多优点,包括可切换的非对映选择性、廉价的碱性催化剂和简单的操作。
Reaction between cyclohexy isocyanide, dialkyl acetylenedicarboxylates and 1-aryl-2-ene-3-acetyl-1,4-diketones. One-pot synthesis of highly functionalized 5-cyclohexylimino-2,5-dihydrofurans
are important intermediates in organic synthesis, and are also important starting materials used in syntheses of a number of natural products. A facile synthesis of highlyfunctionalized 5cyclohexylimino-2,5-dihydrofuran derivatives by the multi-component reaction of cyclohexyl isocyanide, dialkylacetylenedicarboxylates and 1-aryl-2-ene-3-acetyl-1,4-diketones is described.