Saccharose as a new, natural, and highly efficient catalyst for the one-pot synthesis of 4,5-dihydropyrano[3,2-c]chromenes, 2-amino-3-cyano-4H-chromenes, 1,8-dioxodecahydroacridine, and 2-substituted benzimidazole derivatives
作者:Malek Taher Maghsoodlou、Nourallah Hazeri、Mojtaba Lashkari、Fereshteh Nejad Shahrokhabadi、Behzad Naghshbandi、Mohammad Saeed Kazemi-doost、Mahnaz Rashidi、Fatemeh Mir、Mehrnoosh Kangani、Sajjad Salahi
DOI:10.1007/s11164-014-1793-4
日期:2015.10
Saccharose was applied as a green and natural catalyst for the one-pot, three-component condensation between aromatic aldehydes, malononitrile, and resorcinol, or 4-hydroxycoumarine to afford the corresponding pyran-annulated heterocyclic systems. This green methodology offers several advantages such as the use of a non-hazardous catalyst, easy access, clean work-up, excellent yields, short reaction time, and environmentally mild conditions. In addition, 1,8-dioxodecahydroacridine and 2-substituted benzimidazole derivatives have been synthesized from commercially available starting materials, arylaldehydes, dimedone, amines, or ammonium acetate and o-phenylenediamine using the mentioned catalyst.
蔗糖被用作绿色和天然催化剂,进行芳香醛、马来腈和儿茶酚或4-羟基香豆素之间的一锅三组分缩合反应,生成相应的吡喃缩合杂环体系。这种绿色方法具有多个优点,如使用无害催化剂、易于获得、清洁的后处理、优良的产率、短的反应时间以及环保的温和条件。此外,1,8-二氧代十氢吡啶和2-取代苯并咪唑衍生物是通过上述催化剂从商业可获得的起始材料(芳香醛、二酮、胺或醋酸铵和邻苯二胺)合成的。