Stereoisomeric Styryl-substituted Pyrrolidines, 3,7-Diazobicyclo[3.3.0]octanes and 2-Styrylpyrroles from Cinnamaldehyde Iminium-N-methanide 1,3-Dipoles
Stereoisomeric Styryl-substituted Pyrrolidines, 3,7-Diazobicyclo[3.3.0]octanes and 2-Styrylpyrroles from Cinnamaldehyde Iminium-N-methanide 1,3-Dipoles
A Novel Uncatalyzed Insertion Reaction of In Situ Formed Trichlorosilyl Cyanide with Imines: A Facile Silicon Mediated Synthesis of α-Aminonitriles
作者:Abdel-Aziz S. El-Ahl
DOI:10.1081/scc-120016363
日期:2003.1.4
Abstract The tetrachlorosilane-potassium cyanide reagent combination, (trichloro-silyl cyanide-in situ) is a new, safe and versatile hydrogen cyanide substitute. The reaction of this reagent with saturated aldimines 1a–j and benzophenone oxime 3, in absences of any catalyst, affords the corresponding α-aminonitriles 2a–j and 4, respectively, in excellent yield. Under the same condition the bis-imine
Silyl and germyl derivatives of selenophenol and related species
作者:John E. Drake、Raymond T. Hemmings
DOI:10.1039/dt9760001730
日期:——
The silyl and germyl derivatives of selenophenol, SiH3(SePh), GeH3(SePh) and SiH2(SePh)2, and the methylated analogues MMenH3–n(SePh)(M = Si, n= 2 or 3; M = Ge, n= 1–3; M = Sn, n= 3) have been prepared and characterized. The comparative synthetic routes include reactions of halides with lithium benzeneselenolate, lithium tetra(phenylseleno) aluminate, and trimethyl(phenylseleno)silane, and also of
硒酚,SiH 3(SePh),GeH 3(SePh)和SiH 2(SePh)2的甲硅烷基和种基衍生物,以及甲基化类似物MMe n H 3– n(SePh)(M = Si,n = 2或3 ; M = Ge,n = 1-3; M = Sn,n = 3)已经制备并表征。比较的合成路线包括卤化物与苯硒酸锂,四(苯基硒代)铝酸锂和三甲基(苯基硒代)硅烷的反应,以及硒酚与双杀菌基碳二亚胺的反应。这些物质的光谱性质已被报道和讨论。硒硼烷B(SePh)3和B(SeMe)3通过相应的氯化物与SiMe 3(SePh)和SiMe 3(SeMe)的反应形成-膦,P(SePh)3和-砷化砷(SePh)3。三甲基硅烷对B(SePh)3的还原是定量的,但不会发生与甲硅烷的类似反应。
Synthesis of spirocyclic 1,3-oxazines via three-component reactions of α,β-unsaturated N-arylaldimines, dialkyl acetylenedicarboxylate and quinones
作者:Jing Zhang、Chao-Guo Yan
DOI:10.1016/j.tet.2015.07.051
日期:2015.9
structurally diverse spirocyclic 1,3-oxazines were conveniently prepared from three-component reactions of α,β-unsaturated N-arylaldimines, dialkyl acetylenedicarboxylate and quinones in dry acetonitrile without catalyst. Various quinones including p-benzoquinone, 1,4-naphthoquinone, acenaphthenequinone, and phenanthrenequinone as well as benzil were successfully used in the reaction to give the corresponding
在无催化剂的情况下,在无水乙腈中,由α,β-不饱和N-芳基亚胺,乙炔二羧酸二烷基酯和醌的三组分反应可方便地制备一系列结构多样的螺环1,3-恶嗪。反应中成功使用了各种对苯二酚,包括对-苯醌,1,4-萘醌,,菲和苯醌,以及苯甲腈,以高收率得到了相应的螺环1,3-恶嗪。通过1 H NMR光谱和单晶结构阐明了所获得的螺环1,3-恶嗪的非对映异构体。
Synthesis and biological evaluation of some novel diastereoselective benzothiazole β-lactam conjugates
Highly diastereoselective synthesis of some novel benzothiazole-substituted β-lactam hybrids was achieved starting from (benzo[d]thiazol-2-yl)phenol as an available precursor. This is the first time (benzo[d]thiazol-2-yl)phenoxyacetic acid has been used as ketene source in synthesizing monocyclic 2-azetidinones. These compounds were evaluated for their antimicrobial activities against a large panel
从(苯并[ d ]噻唑-2-基)苯酚作为可用的前体开始,实现了一些新型苯并噻唑取代的β-内酰胺杂化物的高度非对映选择性合成。这是(苯并[ d ]噻唑-2-基)苯氧基乙酸第一次被用作合成单环2-氮杂环丁酮的乙烯酮源。评估了这些化合物对一大批革兰氏阳性和革兰氏阴性细菌菌株的抗菌活性,并发现了中等活性。抗疟疾数据显示,在β-内酰胺环上添加甲氧基苯基或乙氧基苯基会使化合物更有效。此外,该化合物的溶血活性和哺乳动物细胞毒性调查显示了它们作为药物的潜力。
Rapid Synthesis of Functionalized (1-Benzo[d]thiazol-2-ylimidazolidin-4-ylidene)acetates and (1-Thiazol-2-ylimidazolidin-4-ylidene)acetates via a Three-Component Reaction
作者:Chao-Guo Yan、Jing Zhang
DOI:10.1055/s-0035-1560965
日期:——
afforded the corresponding (1-thiazol-2-ylimidazolidin-4-ylidene)acetates. A simple synthetic protocol was developed for the efficient synthesis of functionalized (1-benzo[d]thiazol-2-ylimidazolidin-4-ylidene)acetates via a three-component reaction among 2-aminobenzothiazole, α,β-unsaturated N-arylaldimines, and dialkyl acetylenedicarboxylates in anhydrous dichloromethane at room temperature. Additionally
摘要 通过2-氨基苯并噻唑,α,β-不饱和N-芳基亚胺的三组分反应,开发了一种简单的合成规程,用于有效合成官能化的(1-苯并[ d ]噻唑-2-ylimidazolidin-4-亚基)乙酸酯。室温下在无水二氯甲烷中生成乙炔基二羧酸二烷基酯。另外,与2-氨基噻唑的三组分反应提供了相应的(1-噻唑-2-咪唑啉烷-4-亚基)乙酸酯。 通过2-氨基苯并噻唑,α,β-不饱和N-芳基亚胺的三组分反应,开发了一种简单的合成规程,用于有效合成官能化的(1-苯并[ d ]噻唑-2-ylimidazolidin-4-亚基)乙酸酯。室温下在无水二氯甲烷中生成乙炔基二羧酸二烷基酯。另外,与2-氨基噻唑的三组分反应提供了相应的(1-噻唑-2-咪唑啉烷-4-亚基)乙酸酯。