153648-98-7Relevant academic research and scientific papers
Reactions of 2-(methoxyimino)benzen-1-ones with α-alkylethoxycarbonylmethylene(triphenyl)phosphoranes
Nicolaides, Demetrios N,Gautam, Daman R,Litinas, Konstantinos E,Manouras, Christos,Fylaktakidou, Konstantina C
, p. 9469 - 9474 (2001)
The title 2-(methoxyimino)benzen-1-ones react with α-alkylethoxycarbonylmethylene(triphenyl)phosphoranes to give 2H-[b][1,4]benzoxazine derivatives along with benzoxazole and indole derivatives. Reaction mechanisms to explain the formation of products obt
Reactions of 7-methoxyimino-4-methylchromene-2,8-dione with phosphines. Preparation of N-substituted 7-amino-8-hydroxy-4-methyl-2H-[1]-benzopyran-2-ones
Nicolaides, Demetrios N.,Awad, Raed Wajih,Litinas, Konstantinos E.,Malamidou-Xenikaki, Elizabeth
, p. 15007 - 15016 (2007/10/03)
7-Methoxyimino-4-methylchromene-2,8-dione 2 reacts with triarylphosphines 1(a-d) to give the unexpected 7-arylomino-8-hydroxy-4-methyl-2H-[1]-benzopyran-2-ones 7(a-d) and methyl diarylphosphinates 8(a-d) in high yields. The reaction of 2 with trialkylphosphines 1(e,f) as well as with diphenylphosphine 15 leads to the formation of the N-dialkylphosphinoyl derivatives 11, 12, 14 and the N-diphenylphosphinoyl derivative 19, along with compounds 7(e,f). The methylation of compounds 7a, 7f, 11 and 19 is also studied and reaction mechanisms to explain the formation of the products obtained are suggested.
Reactions of 7-(Methoxyimino)-4-methyl-2H-chromene-2,8(7H)-dione with Phosphorus Ylides. Synthesis of 2-Substituted 6-Methyl-8H-benzopyranooxazol-8-ones
Bezergiannidou-Balouctsi, Catherine,Litinas, Konstantinos E.,Malamidou-Xenikaki, Elizabeth,Nicolaides, Demetrios N.
, p. 1175 - 1178 (2007/10/02)
7-(Methoxyimino)-4-methyl-2H-chromene-2,8(7H)-dione (3) reacts with phosphonium salts 1a-c, 8a, b under phase-transfer catalysis conditions to afford the title 2-substituted 6-methylbenzopyranooxazol-8-ones 5a-c, 10a, b, respectively, along with compound 6, instead of the expected Wittig reaction products.However, the reaction of 3 with the stable phosphorus ylides 11a-c in addition to the corresponding benzopyranooxazoles 12a-c and compound 6 affords in the last case compound 16 as well according to a sequence involving an initial Wittig reaction between 11c and 3. - Key Words: Oxazolocoumarins / Phosphorus ylides / 2H-Chromene-2,8(7H)-dione, 7-(methoxyimino)-4-methyl- / Wittig reaction / Benzopyranooxazol-8-ones
