共查询到20条相似文献,搜索用时 109 毫秒
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以生物质来源的对甲氧基苯甲醛(大茴香醛)为原料,经还原反应制备得到对甲氧基苄醇,经氯代反应制备得到对甲氧基氯苄,再与乙酰乙酸乙酯经取代反应制备得到2-乙酰基-3-(4-甲氧基苯基)丙酸乙酯,再经串联的水解、脱羧反应制备得到4-(4-甲氧基苯基)-2-丁酮,最后经脱甲基反应制备得到4-对羟基苯基-2-丁酮,总收率为60.7%。具有路线简捷、易于操作、环境友好、收率高等优点。 相似文献
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设计合成了一系列文献中未报道的2-取代-6-甲基-4-苯基-3(2H)-哒嗪酮类化合物,其结构经过1H NMR和元素分析确证,化合物4e进行了X射线衍射晶体结构分析.利用油菜平皿法和稗草小杯法对化合物进行了生物活性的测定.初步生物活性测试结果表明,化合物4具有较好的除草活性.定量构效关系表明,化合物4结构中哒嗪环2-位取代基的变化,影响了化合物的抑制活性.当作用对象为油菜时,化合物的活性可能主要与取代基R的立体参数B4和疏水性有关;当作用对象为稗草时,化合物的活性可能主要与取代基R的疏水性有关.部分化合物4的抑制活性与对照药品5b,5k基本相当,但没有表现出5b,5k所具有的白化效果.化合物4与5这两类结构类似的化合物很可能在生物体内拥有不同的作用机制. 相似文献
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A fast and straightforward three-component reaction to 2-amino-5-alkylidene-thiazol-4-ones is described. The one-pot methodology, reported for the first time, involves Knoevenagel condensation of aromatic aldehydes and rhodanine followed by displacement of the thiocarbonyl sulfur with primary or secondary amines in the same reaction mixture. The reactions were performed using a dedicated microwave reactor, which enabled short reaction times and easy work-up. 相似文献
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The synthesis of 9,10-imino-phenanthrene is performed in two steps from phenanthrene. N-alkylation using Michael type reaction is also disclosed. 相似文献
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Sologub L. S. Moshchitskii S. D. Markovskii L. N. Ivashchenko Ya. N. 《Chemistry of Heterocyclic Compounds》1970,6(9):1150-1153
2,3,5,6-Tetrachloropyridine-4-sulfenyl chloride has been prepared, and its reactions with nucleophilic reagents have been examined.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp 1232–1235, September, 1970. 相似文献
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Skov L Petersen MÅ Broman SL Bond AD Nielsen MB 《Organic & biomolecular chemistry》2011,9(19):6498-6501
A new procedure for functionalization of the dihydroazulene photoswitch on its seven-membered ring was developed, which has allowed isolation of the first dihydroazulene with a phenyl substituent at position 5 from a mixture of regioisomers. Light-induced ring-opening to the corresponding vinylheptafulvene and the thermal back-reaction was studied in detail. 相似文献
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Starting from 4-substituted cyclohexanones, a practical synthetic route to enantiopure 6-substituted cis-decahydroquinolines has been developed, the key steps being a stereoselective cyclocondensation of an unsaturated δ-keto ester derivative with (R)-phenylglycinol and the stereoselective hydrogenation of the resulting tricyclic oxazoloquinolone lactams. 相似文献
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F. Angelucci G. Barchielli G.A. Brussani M. Gigli B. Gioia R. Hermann A. Suarato E. Vanotti S. Penco 《Tetrahedron letters》1985,26(46):5693-5696
The regiospecific synthesis of 6-deoxydaunomycinone 3 and 1-hydroxy-4-demethoxy-11-deoxydaunomycinone (4) is reported: the route allows the preparation of 6-deoxy or 11-deoxyanthracyclinones through the γ or δ lactones 6 and 11. 相似文献
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Jianmin Zhang 《Tetrahedron letters》2010,51(36):4699-393
The reaction of an α-chloroglycinate ester with the dimethylaluminum acetylide derivative of phenyl propargyl ether provides the corresponding 5-vinyloxazole in 40-50% yield. 相似文献