A系列(η的6 1,4-二氢-3,1-苯并恶嗪-arene)tricarbonylchromium衍生物的合成和表征。由两个替代方法,即获得的化合物中,由triammine(三羰基)铬的与1,4-二氢-3,1-苯并恶嗪(方法反应阿通过缩合(η)和6 -2-氨基苄醇)三羰基铬与各种醛和酮(方法B)。通过不同的物理化学分析方法,如HPLC,UV,IR,1 H NMR光谱,质谱和X射线衍射,确定了所得化合物的组成和结构。
General synthetic approach towards annelated 3a,6-epoxyisoindoles by tandem acylation/IMDAF reaction of furylazaheterocycles. Scope and limitations
作者:Fedor I. Zubkov、Eugenia V. Nikitina、Timur R. Galeev、Vladimir P. Zaytsev、Victor N. Khrustalev、Roman A. Novikov、Daria N. Orlova、Alexey V. Varlamov
DOI:10.1016/j.tet.2014.01.008
日期:2014.2
investigated. The obtained Diels–Alder adducts are attractive and useful substrates for further transformations. Fused isoindoles can be prepared from them in one-step by aromatization of the 7-oxabicyclo[2.2.1]heptene ring. Other transformations, including halogenation, ring cleavage, and Wagner–Meerwein skeletal rearrangement, are also demonstrated. The spatial structures of the obtained compounds have
Highly Efficient One-Pot Synthesis of 2-Substituted Quinazolines and 4<i>H</i>-Benzo[<i>d</i>][1,3]oxazines<i>via</i>Cross Dehydrogenative Coupling using Sodium Hypochlorite
describes a catalyst-free synthesis of 2-substitutedquinazolines and 4H-benzo[d][1,3]oxazines using commericially available sodiumhypochlorite as oxidant. Operational simplicity, mild reaction conditions and the ability to construct structurally diverse 2-quinazolines and 2-substituted4H-benzo[d][1,3]oxazines by this method render it to be a practical alternative for the synthesis of these heterocycles
该通报描述了使用市售的次氯酸钠作为氧化剂的无催化剂合成2-取代的喹唑啉和4 H-苯并[ d ] [1,3]恶嗪。操作简便,反应条件温和以及通过该方法构造结构上不同的2-喹唑啉和2-取代的4 H-苯并[ d ] [1,3]恶嗪的能力使其成为合成这些杂环的实用选择。
CuCl/DABCO/4-HO-TEMPO-Catalyzed Aerobic Oxidative Synthesis of 2-Substituted Quinazolines and 4<i>H</i>-3,1-Benzoxazines
Cu/N-ligand/TEMPO catalytic system was first applied to the aerobic oxidative synthesis of heterocycles. As demonstrated, 2-substituted quinazolines and 4H-3,1-benzoxazines were synthesized efficiently from the one-pot reaction of aldehydes with 2-aminobenzylamines and 2-aminobenzyl alcohols, respectively, by employing CuCl/DABCO/4-HO-TEMPO as the catalysts and oxygen as the terminal oxidant.
Cu / N-配体/ TEMPO催化体系首先被用于杂环的好氧氧化合成。如所证明的,通过使用CuCl / DABCO / 4-HO-TEMPO分别由醛与2-氨基苄胺和2-氨基苄醇的一锅反应有效地合成了2-取代的喹唑啉和4 H -3,1-苯并恶嗪。作为催化剂,氧气作为末端氧化剂。
Synthesis of (η6-arene)tricarbonylchromium derivatives of 1,4-dihydro-3,1-benzoxazines
作者:E. V. Sazonova、A. N. Artemov、V. I. Faerman、N. A. Aksenova、A. A. Timofeeva、Yu. A. Zaytseva、N. V. Somov、N. Yu. Grishina
DOI:10.1007/s11172-021-3073-y
日期:2021.1
A series of (η6-arene)tricarbonylchromiumderivatives of 1,4-dihydro-3,1-benzoxazines was synthesized and characterized. The compounds were obtained by two alternative methods, namely, by the reaction of triammine(tricarbonyl)chromium with 1,4-dihydro-3,1-benzoxazines (method A) and by the condensation of (η6-2-aminobenzyl alcohol)tricarbonylchromium with various aldehydes and ketones (method B). The
A系列(η的6 1,4-二氢-3,1-苯并恶嗪-arene)tricarbonylchromium衍生物的合成和表征。由两个替代方法,即获得的化合物中,由triammine(三羰基)铬的与1,4-二氢-3,1-苯并恶嗪(方法反应阿通过缩合(η)和6 -2-氨基苄醇)三羰基铬与各种醛和酮(方法B)。通过不同的物理化学分析方法,如HPLC,UV,IR,1 H NMR光谱,质谱和X射线衍射,确定了所得化合物的组成和结构。