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A total synthesis of the 5-ylidenepyrrole-2-one pukeleimide A (3), a constituent of the marine blue-green alga Lyngbya majuscula, is described.  相似文献   

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《Tetrahedron letters》1987,28(47):5887-5888
The dehydroxymethyl analog of bulgecin A was synthesized in order to establish a synthetic route of bulgecin A.  相似文献   

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一种结构新颖的螺锗化合物的合成   总被引:1,自引:0,他引:1  
陶春元 《有机化学》1994,14(6):613-615
在吡啶存在下,本文利用手性配体试剂L-N,N-双(2-羟乙基)苏氨酸(1)与β-羧基乙基锗倍半氧化物(2)反应,首次得到一种具有旋光性、含δ-内酯环新颖结构的螺锗化合物(3)。^1H NMR ,IR和MS的测定数据均表明NGe配键是存在的。  相似文献   

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按照药物拼合原理,在黄酮分子中引入具有降血脂作用的丹皮酚(5,中药丹皮的有效成分)和非诺贝特的结构特征:对羟基苯甲醛(2)与氯乙酸乙酯通过Williamson反应制得对醛基苯氧基乙酸乙酯(3);3水解得对醛基苯氧基乙酸(4);4与5经羟醛缩合制得(E)-2-14-[3-(2·羟基4-甲氧基苯基)-3-氧代丙烯-1-基]...  相似文献   

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The synthesis of a nanocar with a built-in strong net dipole is disclosed. The synthesis was executed to explore a more effective handle on electric-field-induced rolling of nanocars.  相似文献   

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报道了利用葡萄糖衍生物在二甲苯中加热发生的Claisen重排反应和经典的硼氢化钠还原方法合成八元碳环糖类似物的方法。  相似文献   

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A novel pyrrolopyridodiazepine ring system was synthesized from methyl 2‐methyl nicotinate.  相似文献   

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A highly convergent entry to chiral heteroaromatic prostacyclin analogues is outlined.  相似文献   

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Acidic cyclization of 3′, 3″′-linked 2′, 2″′-dihydroxy-4, 4′, 4″, 4″′, 6′, 6″′-hexamethoxybichalcone (I) with alcoholic phosphoric acid gave a new naringenyl-chalcon hexamethyl ether (II) along with hexa-O-methyl-8,8″-binaringenin.  相似文献   

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2-[(5-Methyl-1,3,4-oxadiazol-2-yl)methyl]benzenamine ( 15 ) was prepared in four steps from o-nitrophenyl-acetic acid, and treated with triethyl orthoformate in an attempt to prepare an oxadiazolobenzodiazepine. However, the resulting product was 13-(5-methyl-1,3,4-oxadiazol-2-yl)-5H-indolo[2,1-b][1,3]benzodiazepine monohydrate ( 16 ). Indolobenzodiazepine 16 is the first reported member of a novel ring system. Interesting features of the synthesis of 16 are discussed, including the mechanism of formation from 15.  相似文献   

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