1353547-14-4Relevant articles and documents
Synthesis of 4-quinolones via cyclocondensation of substituted ortho-amidoacetophenones: A refit to the camps cyclization by applying trimethylsilyl trifluoromethanesulfonate/triethylamine
Eidamshaus, Christian,Triemer, Therese,Reissig, Hans-Ulrich
supporting information; experimental part, p. 3261 - 3266 (2011/11/30)
A modification of the classical Camps cyclization is described. A series of substituted 4-quinolone derivatives is prepared via trimethylsilyl trifluoromethanesulfonate/triethylamine induced cyclocondensation of substituted ortho-amidoacetophenones. The process shows a broad substrate scope and allows selective preparation of 2-aryl- and 2-alkyl-substituted 4-quino-lones. Enantiopure starting materials react without loss of optical purity using the modified conditions. Subsequent transformations of the products involving preparation of a 4-quinolyl nonaflate and O-selective methylation are also described. Georg Thieme Verlag Stuttgart · New York.