802-49-3Relevant articles and documents
Tuning Microenvironment of Quaternary Ammonium Salt and Tertiary Amine Bifunctionalized Polyacrylonitrile Fiber for Cooperatively Catalyzed Aza-Michael Addition
Yuan, Xueyu,Du, Huimin,Zhao, Jingyan,Chima, Anyaegbu Ejike,Ma, Ning,Tao, Minli,Zhang, Wenqin
, p. 832 - 843 (2020/08/10)
A series of novel polyacrylonitrile fiber catalysts modified with different ratio of quaternary ammonium salt (QA) to tertiary amine (TA) were screened for heterogeneously catalyzed aza-Michael addition in water. The best catalyst was found to be PAN
An uncommon use of irradiated flavins: Br?nsted acid catalysis
Arakawa, Yukihiro,Mihara, Tomohiro,Fujii, Hiroki,Minagawa, Keiji,Imada, Yasushi
supporting information, p. 5661 - 5664 (2020/06/09)
We present that thioacetalization of aldehydes can be induced by blue light irradiation in the presence of a catalytic amount of riboflavin tetraacetate (RFTA) under aerobic conditions. Several control experiments have suggested that the reaction is more
Ionic liquid-immobilized proline(s) organocatalyst-catalyzed one-pot multi-component Mannich reaction under solvent-free condition
Prabhakara,Maiti, Barnali
, p. 2381 - 2401 (2020/01/31)
A highly efficient clean and simple methodology has been established for the one-pot Mannich reaction using ionic liquid-immobilized proline(s) organocatalyst under solvent-free conditions. The three components comprising substituted acetophenones, substituted aromatic aldehydes and substituted aromatic amines underwent Mannich reactions in the presence of 7?mol% of ionic liquid-immobilized proline(s) organocatalyst to provide β-amino carbonyl compounds in 2–3?h at room temperature with excellent yields. This methodology provides several advantages such as mild reaction conditions, short reaction time, low catalyst loading percentage, multi-component approach, transition metal-free and solvent-free synthesis. The ionic liquid-immobilized proline(s) organocatalyst was recycled and reused five times without a significant loss of its catalytic activity.