140184-19-6Relevant articles and documents
Multi-catalysis cascade reactions based on the methoxycarbonylketene platform: Diversity-oriented synthesis of functionalized non-symmetrical malonates for agrochemicals and pharmaceuticals
Ramachary, Dhevalapally B.,Venkaiah, Chintalapudi,Reddy, Y. Vijayendar,Kishor, Mamillapalli
supporting information; scheme or table, p. 2053 - 2062 (2009/09/05)
In this paper we describe new multi-catalysis cascade (MCC) reactions for the one-pot synthesis of highly functionalized non-symmetrical malonates. These metal-free reactions are either five-step (olefination/hydrogenation/alkylation/ ketenization/esterif
Efficient synthesis of halo indanones via chlorosulfonic acid mediated Friedel-Crafts cyclization of aryl propionic acids and their use in alkylation reactions
Sharma, Anil K.,Subramani, Amutha V.,Gorman, Christopher B.
, p. 389 - 395 (2007/10/03)
Several halo indanones were synthesized from benzyl Meldrum's acid derivatives in two steps. Although several Lewis acids are effective for the Friedel-Crafts ring-closing reaction on more electron-rich arenes, in the case of the electron-deficient arenes this chemistry is not efficient. Here it is reported that chlorosulfonic acid (used as solvent) is an efficient reagent for cyclization of electron-withdrawing arenes. These molecules are potentially useful for subsequent alkylation reactions. The selective alkylation of 5,7-dibromo indanone is demonstrated using Pd-catalyzed Grignard coupling to provide monoalkylated indanone in good yield.