Mohareb, Rafat Milad; Ghabrial, Sami Selim; Wardakhan, Wagnat Wahba, Phosphorus, Sulfur and Silicon and the Related Elements, 1998, vol. 134-135, p. 119 - 136
通过醛与3-氧代丁腈1之间的Knoevenagel缩合反应制得2-亚芳基-3-氧代丁腈衍生物2,该缩合反应是通过β-氨基丁烯腈的酸水解而获得的。3-乙酰-2-氨基-4 H-铬5-5(6 H)-1衍生物3是通过2-亚芳基3-氧代丁腈2和5-取代的1,3-环己二酮在乙二醇中的反应合成的。11-甲基-3,8-二取代-12-芳基-3,4,7,8,9,12-六氢-1 H -chromeno [2,3 - b ]喹啉-1,10(2 H)-二酮衍生物4通过化合物3的Friedländer反应获得用对甲苯磺酸一水合物作为催化剂的5取代1,3,3-环己二酮。所有新化合物的结构均通过元素分析,IR,MS和1 H NMR光谱进行了表征。化合物4f的晶体和分子结构已经通过单晶XRD分析确定。
DOI:
10.1002/jhet.1930
作为试剂:
描述:
氰基丙酮 、 苯甲醛 、 哌啶 、 溶剂黄146 在
2-acetyl-3-phenylprop-2-enenitrile 作用下,
以
甲苯 为溶剂,
反应 8.0h,
以This resulted in 2.3 g (24%) of 2-benzylidene-3-oxobutanenitrile as a yellow solid的产率得到2-acetyl-3-phenylprop-2-enenitrile
alternative to classical cyanomethylation is possible by using electrogenerated bases (EGBs), obtained by electroreduction of aryl halides in an undivided cell fitted with a cadmium coated cathode and a sacrificial magnesium anode. Acetonitrile is used both as solvent and as hydrogen-active compound. A coupling reaction with various electrophilic compounds was carried out. When the electrophilic compound
acridones and their cyclo[b ]‐fused derivatives are efficiently constructed by a double annulation of o ‐enoyl arylisocyanides with α , β ‐unsaturated carbonyls under simple metal‐free condition. This protocol is general, efficient and practical, featuring the successive formation of two rings by a one‐pot domino transformation. A tandem process involing an isocyanide‐based [1+4] cycloaddition, an aminofuran‐based
在简单的无金属条件下,通过邻烯基芳基异氰酸酯与α,β-不饱和羰基的双环化,可以有效地构建各种各样的a烯及其环[ b ]稠合衍生物。该协议是通用,高效和实用的,其特点是通过一锅多米诺骨牌变换连续形成两个环。提出了将异氰酸酯基[1 + 4]环加成,氨基呋喃基分子内[4 + 2]环加成,开环和芳构化等串联过程。
Magnesium Halide‐Catalyzed Synthesis of Oxaspiro[2.5]octenes from a Methylenecyclopropane and Acyl Cyanoalkenes
Novel transformation of methylenecyclopropanes (MCPs) with acyl cyanoalkenes has been achieved to give oxaspiro[2.5]octenes. This annulation is successfully catalyzed by magnesium halides under mild reaction conditions, and shows a broad functional group tolerance. The reaction includes a rare reaction course, which involves an intramolecular oxa-Michael addition of Mg enolate after the ring opening
domino process from Morita-Baylis-Hillman carbonates of isatins and acrylate and [small alpha]-cyano-[small alpha],[small beta]-unsaturated ketones to deliver highly enantioenriched tetrahydrofuro[2',3':4,5]pyrano[2,3-b]indoles was disclosed catalysed by cinchona-derived tertiary amines, involving [small alpha]-regioselective cyclopropanation, ring-opening,...
Formal Asymmetric Cycloaddition of Activated α,β-Unsaturated Ketones with α-Diazomethylphosphonate Mediated by a Chiral Silver SPINOL Phosphate Catalyst
nonspiro-phosphonylpyrazolines via an asymmetric formal 1,3-dipolar cycloaddition reaction of α-diazomethylphosphonate with activated, acyclic α,β-unsaturatedketones, bearing an additional nitrile electron-withdrawing group, has been developed, utilizing an in situ generated chiral silver phosphate catalyst, affording excellent stereoselectivities (up to 98% ee, 99:1 dr) and yields (up to 95%). A stepwise