iEDDA Reaction of the Molecular Iodine-Catalyzed Synthesis of 1,3,5-Triazines via Functionalization of the sp<sup>3</sup> C–H Bond of Acetophenones with Amidines: An Experimental Investigation and DFT Study
作者:Abhishek R. Tiwari、Shilpa R. Nath、Kaustubh A. Joshi、Bhalchandra M. Bhanage
DOI:10.1021/acs.joc.7b02313
日期:2017.12.15
Diels–Alder (iEDDA)-type reaction to synthesize 1,3,5-trizines from acetophenones and amidines. The use of molecular iodine in a catalytic amount facilitates the functionalization of the sp3 C–H bond of acetophenones. This is a simple and efficient methodology for the synthesis of 1,3,5-triazines in good to excellent yields under transition-metal-free and peroxide-free conditions. The reaction is believed to
1,3,5-Triazines were obtained via Cu(OAc)2 catalyzed reaction of benzamidine hydrochlorides and alcohols in air.
1,3,5-三嗪通过在空气中使用Cu(OAc)2催化苯甲酰胺盐酸盐和醇的反应获得。
Iridium-catalyzed cascade dehydrogenation, ring-closure reaction leading to 2,4,6-triaryl-1,3,5-triazines
作者:Gang Shi、Fei He、Youxin Che、Caihua Ni、Ying Li
DOI:10.1134/s1070363216020304
日期:2016.2
An efficient iridium-catalyzed dehydrogenation, ring-closurereaction, has been developed via a cascade sequence, in which [Cp*IrI2]2/Xantphos proved to be the most efficient catalyst for the synthesis of 2,4,6-triaryl-1,3,5-triazines from stable aryl-substituted alcohols and amidines. It was the first case of iridium catalyst successful application in such transformation.
通过级联序列开发了一种有效的铱催化的脱氢,闭环反应,其中[Cp * IrI 2 ] 2 / Xantphos被证明是合成2,4,6-三芳基-的最有效催化剂。来自稳定的芳基取代的醇和am的1,3,5-三嗪 这是铱催化剂成功应用于此类转化的第一种情况。
Mechanistic insight into the azo radical-promoted dehydrogenation of heteroarene towards N-heterocycles
作者:Amreen K. Bains、Debashis Adhikari
DOI:10.1039/d0cy01008a
日期:——
reactions to synthesize wide variety of N-heterocycles. In these processes, the dehydrogenation of saturated heteroarenes in the late stage is generally required to furnish the desired N-heterocycle. However, in a one-pot, multistep heterocycle synthesis, this step is not well elucidated, and the role of the catalyst is not thoroughly understood. Furthermore, the use of copious amount of base at elevated
NIS-catalyzed oxidative cyclization of alcohols with amidines: a simple and efficient transition-metal free method for the synthesis of 1,3,5-triazines
作者:Abhishek R. Tiwari、Akash T.、Bhalchandra M. Bhanage
DOI:10.1039/c5ob01835h
日期:——
An efficient method for the synthesis of 1,3,5-triazines by NIS-catalyzed oxidative cyclization of alcohols with amidines has been developed. The reaction works smoothly under transition-metal free and phosphine-free conditions to afford a wide range of 1,3,5-triazine derivatives in moderate to good yields. The synthetic methodology was achieved via in situ oxidation of alcohols to aldehydes.