The one-pot synthesis of 14-aryl or alkyl-14H-dibenzo[a,j]xanthenes catalyzed by P2O5/Al2O3 under microwave irradiation
作者:Amin Zarei、Abdol R. Hajipour、Leila Khazdooz
DOI:10.1016/j.dyepig.2009.10.015
日期:2010.5
convenient and efficient procedure for the synthesis of 14-aryl or alkyl-14H-dibenzo[a,j]xanthenes by condensation of 2-naphthol and aldehydes in the presence of P2O5/Al2O3 is described. Both aromatic and aliphatic aldehydes react easily to afford the corresponding 14-aryl or alkyl-14H-dibenzo[a,j]xanthenesunder microwave irradiation. This reaction was studied under different conditions; several solvents
描述了在P 2 O 5 / Al 2 O 3存在下通过2-萘酚和醛的缩合来合成14-芳基或烷基-14 H-二苯并[ a,j ]黄嘌呤的简便有效的方法。芳族和脂族醛都容易反应,得到相应的14-芳基或烷基-14 H-二苯并[ a,j微波辐射下的]黄嘌呤。在不同条件下研究了该反应。检查了几种溶剂的转化率。在反应时间和产率方面,发现当在微波辐射下进行反应时获得最佳结果。
Task specific dicationic acidic ionic liquids catalyzed efficient and rapid synthesis of benzoxanthenones derivatives
作者:Najmedin Azizi、Fatemeh Shirdel
DOI:10.1016/j.molliq.2016.07.128
日期:2016.10
approach to the synthesis of dibenzo[a,j]xanthenes and 1,8-dioxo-octahydroxanthenes using task specific dicationic acidic ionicliquids as a highly efficient and readily available catalyst under solvent-free condition have been developed. A series of Brønsted–Lewis acidic ionicliquid were prepared and investigated their catalytic activity for synthesis of various xanthenes derivatives from aldehydes
Facile and Efficient Synthesis of 14‐Alkyl‐ or Aryl‐14‐H‐Dibenzo[a,j]xanthenes using Sulfonyl‐Functionalized Ionic Liquids
作者:Pratibha Kumari、Vinith Yathindranath、S. M. S. Chauhan
DOI:10.1080/00397910701798234
日期:2008.1.1
Abstract An efficient, simple, and rapid synthesis of 14‐alkyl‐or aryl‐14‐H‐dibenzo[a,j]xanthenes is reported by one‐pot condensation of 2‐naphthol with alkyl or aryl aldehydes in the presence of sulfonyl‐functionalized acidic ionic liquids at 125°C.
An efficient, high yielding, and eco-friendly method for the synthesis of 14-aryl- or 14-alkyl-14H-dibenzo[a,j]xanthenes using polyvinylsulfonic acid as a recyclable Brønsted acid catalyst
作者:Ali Rahmatpour
DOI:10.1007/s00706-011-0537-z
日期:2011.12
Aryl or alkyl-14H-dibenzo[a,j]xanthene derivatives were synthesized efficiently by the reaction of 2-naphthol and aromatic or aliphatic aldehydes in the presence of polyvinylsulfonic acid (PVSA) as a reusable Bronsted acid catalyst under aqueous conditions at 90 A degrees C. This reaction was studied under different conditions, and several solvents were examined. In terms of reaction yield and time, water was found to be the optimum solvent. The catalytic performance of PVSA was then compared with various acidic catalysts under optimized reaction conditions. The catalyst is well characterized using IR and DSC techniques.