Tetrahydroquinazoline Derivatives by Aza Diels-Alder Reaction
摘要:
The reaction of N-(2-Chloromethylphenyl)benzenesulfonamides (1) with N-benzylideneamines (2) gives 1,2,3,4-tetrahydroquinazoline derivatives (3) via the highly reactive o-azaxylylene intermediates. The structure of (3) is fully assigned on the basis of analytical and spectroscopic data. The chemical behaviour of (3) has been studied.
A transition-metal-free method for the synthesis of indolines has been developed. In the presence of K2CO3, the cyclization reaction of N-(ortho-chloromethyl)arylamides and iodonium ylides proceeded smoothly at room temperature in moderate to good yields.
已经开发了用于合成二氢吲哚的无过渡金属的方法。在K 2 CO 3的存在下,N-(邻-氯甲基)芳基酰胺和碘鎓碘化物的环化反应在室温下以中等至良好的收率顺利进行。
Synthesis of Fullerotetrahydroquinolines via [4 + 2] Cycloaddition Reaction of [60]Fullerene with in Situ Generated Aza-<i>o</i>-quinone Methides
作者:Sheng-Peng Jiang、Wen-Qiang Lu、Zhan Liu、Guan-Wu Wang
DOI:10.1021/acs.joc.7b02897
日期:2018.2.16
An efficient [4 + 2] cycloaddition reaction of [60]fullerene with the in situ generated aza-o-quinone methides from N-(o-chloromethyl)aryl sulfonamides with the assistance of Cu2O has been developed to afford a series of fullerotetrahydroquinolines. This strategy exhibits a broad substrate scope and excellent functional group tolerance. A tentative reaction pathway for the formation of fullerotetrahydroquinolines
Rhodium(III)‐Catalyzed C−H Benzylation of Indole's C3 Position with Aza‐
<i>o</i>
‐Quinone Methides
作者:Ruixing Liu、Yin Wei、Min Shi
DOI:10.1002/adsc.202000613
日期:2020.9.8
activation relay using aza‐o‐QM as a functionalization reagent, affording the desired products in good yields under mild conditions. The plausible reaction mechanism is proposed on the basis of control and deuteriumlabeling experiments and the further transformation has been also described.
Diversity-oriented synthesis of 1,2,3,5-tetrahydrobenzo[e][1,2,4]oxadiazepines and 2,3-dihydro-1H-benzo[e][1,2,4]triazepines by base-induced [4 + 3] annulation reactions
作者:Wuyan Long、Shuangqun Chen、Xiaohong Zhang、Ling Fang、Zhiyong Wang
DOI:10.1016/j.tet.2018.09.004
日期:2018.10
The base-induced formal [4 + 3] annulation reactions of N-(ortho-chloromethyl)aryl amides with nitrones or hydrazonoyl chlorides have been reported. When nitrones are used as the 1,3-dipole, the corresponding reaction afforded a series of 1,2,3,5-tetrahydrobenzo[e][1,2,4]oxadiazepine derivatives. Highly functionalized 2,3-dihydro-1H-benzo[e][1,2,4]triazepine derivatives were also synthesized via an
已经报道了碱诱导的N-(邻氯甲基)芳基酰胺与硝酮或酰肼基氯化物的正式[4 + 3]环化反应。当将硝酮用作1,3-偶极时,相应的反应得到一系列1,2,3,5-四氢苯并[ e ] [1,2,4]恶二氮杂衍生物。还通过N-(邻-氯甲基)芳基酰胺和酰基之间空前的串联氮杂-迈克尔加成/重排芳构化反应合成了高度官能化的2,3-二氢-1 H-苯并[ e ] [1,2,4]三氮杂卓衍生物氯化物。
Construction of Optically Active Indolines by Formal [4+1] Annulation of Sulfur Ylides and<i>N</i>-(<i>ortho</i>-Chloromethyl)aryl Amides
Get asymmetric! Asymmetric [4+1] annulation of sulfur ylides and N‐(ortho‐chloromethyl)arylamides allowed the formation of the desired cycloadduct with moderate to high yields and enantioselectivities (see scheme). The described strategy, taking advantage of chiral sulfur ylides, represents a direct procedure to access chiral 2‐substituted indolines.