离子液体,即[甜菜碱][H 2 PO 4 ],被发现是无溶剂条件下xanthen-9-ol与不同亲核试剂直接取代反应的有效催化剂。该催化体系易于操作,后续后处理程序简单,离子液体催化剂可在高催化活性水平下重复使用至少五个循环。此外,离子液体制备简单,原料廉价,生物相容性好。因此,我们的研究提出了一种有趣且可持续的直接替代酒精的方案。
Novel Reaction of Indoles and Pyrrole with Pyrillium Catalyzed by Ceric Ammonium Nitrate (CAN)
作者:Shun-Jun Ji、Shun-Yi Wang
DOI:10.1055/s-2007-985590
日期:——
The reaction of xanthene derivatives with indoles and pyrrole catalyzed by CAN in methanol through S N 1 reaction of -pyrillium with a nucleophilic reagent afforded the corresponding -indole- and pyrrole-substituted xanthene derivatives in high yields, respectively.
Iodine-catalyzed efficient synthesis of xanthene/thioxanthene-indole derivatives under mild conditions
作者:Weihang Miao、Pingting Ye、Mengjiao Bai、Zhixin Yang、Suyue Duan、Hengpan Duan、Xuequan Wang
DOI:10.1039/d0ra05217e
日期:——
xanthen-9-ol and thioxanthen-9-ol with indoles has been developed, providing an efficient procedure for the synthesis of xanthene/thioxanthene-indole derivatives with good to excellent yields. This protocol offers several advantages, such as short reaction times, green solvent, operational simplicity, easily available catalyst and mild reaction conditions. Moreover, this method showed good tolerance of functional
The direct substitutions of 9H-xanthen-9-ol with indoles in a room temperature ionic liquid medium BmimBF4
作者:Ling-yan Liu、Bing Wang、Hong-mei Yang、Wei-xing Chang、Jing Li
DOI:10.1016/j.tetlet.2011.08.085
日期:2011.10
simple, atom economical, highly efficient and green protocol has been developed for the SN1-type substitutions of 9H-xanthen-9-ol with indoles or other nucleophiles (such as diketone and pyrrole). This approach provides the substitution products in high or excellent yields in the BmimBF4 media at roomtemperature.
已经开发出一种简单,原子经济,高效且绿色的方案,用于用吲哚或其他亲核试剂(例如二酮和吡咯)将9 H-黄嘌呤-9-ol进行S N 1型取代。在室温下,该方法可在BmimBF 4培养基中以高收率或优异的收率提供替代产品。
Commercially available simple ionic liquids-promoted dehydrative carbon–carbon bond-forming reaction of diarylmethanols and triarylmethanols with pyrroles, thiophene, furan and indoles
bond-forming reaction of a variety of diarylmethanols and triarylmethanols with π-rich heteroaromatics, such as pyrroles, indole, furan, and thiophene without ring-opening and polymerization to give the corresponding not only 2-substituted pyrroles, furan, and thiophene but also 3-substituted indoles in good to excellent yields with moderate to excellent regioselectivities. These dehydrative C–C bond