5766-40-5Relevant academic research and scientific papers
Benzodifurantrione compounds and process
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, (2008/06/13)
Benzodifurantriones of Formula (1): STR1 in which W is unsubstituted or substituted aryl, a process for their preparation via dioxo intermediates and processes for their conversion into benzodifuranone dyes and compounds of Formula (7): STR2 are provided wherein R3 is --H, --COR2, --SO2 R2 -- which R2 is alkyl, cycloalkyl, aryl or aralkyl and R4 is --COOR2, --CONRR1 in which R and R1 each independently is --H, alkyl, cycloalkyl, aryl or aralkyl; --COOH or the alkali metal, alkaline earth metal or ammonium salts thereof; or --COX2 -- which X2 is halo.
Rearrangement of 2-(Arylmethoxy)methyl-2-oxazolines via Lithium Azaenolates: a Facile Synthetic Route to ortho-Methylmandelic Acid Derivatives
Kamata, Kazuyuki,Terashima, Masanao
, p. 2771 - 2772 (2007/10/02)
2-(Arylmethoxy)methyl-2-oxazolines, on treatment with LDA in THF at low temperature, rearrange to afford products which are hydrolysed to ortho-methylmandelic acids or α-(1-methyl-2-naphthyl)glycolic acid.
SYNTHESIS AND SOME PROPERTIES OF 1,1-DI(ALKOXYCARBONYLAMINO)-2,2-DIHALOGENO- AND 1,1-DI(ALKOXYCARBONYLAMINO)-2,2,2-TRIHALOGENOETHANES
Bal'on, Ya. G.,Smirnov, V. A.
, p. 2249 - 2254 (2007/10/02)
1,1-Di(alkoxycarbonylamino)-2,2,2-trihalogenoethanes were obtained by heating trihalogenoacetaldehydes or their hydrates with urethanes in a ratio of 1:2 in the presence of catalytic amounts of concentrated sulfuric acid.The products were reduced selectively with aluminum amalgam in 90percent alcohol to 1,1-di(alkoxycarbonylamino)-2,2-dihalogenoethanes.Compounds of both types react smoothly with benzene and its homologs in the presence of concentrated sulfuric acid and give 1-alkoxycarbonylamino-1-aryl-2,2-dihalogeno- and 1-alkoxycarbonylamino-1-aryl-2,2,2-trihalogenoethanes respectively.In an alkaline medium the latter are cleaved to aryloxyacetic acid, and with phosphorus pentachloride they form 1-aryl-2,2-dihalogeno- and 1-aryl-2,2,2-trihalogenoethyl isocyanates.
