Reference

Bis(etherphthalimides)

Bis(etherphthalimides). Williams, Frank J., III; Dellacoletta, Brent A. (General Electric Co., USA). U.S. US 4455431 A 19 Jun 1984, 4 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C07D209-48. NCL: 548461000. APPLICATION: US 82-354978 5 Mar 1982. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) Bis-etherphthalimides are prepd. by nitrating a N-substituted phthalimide with HNO3, isolating the nitrophthalimide in a C1-3 perchloroalkane soln., removing traces of HNO3 from the soln., adding the soln. directly to a mixt. of alkali metal bisphenoxide salt and a nonpolar org. solvent while the org. solvent is refluxing in amts. sufficient to produce a reaction mixt. having u2 mol of nitrophthalimide per mol bisphenoxide salt, distg. a major amt. of the nonpolar org. solvent from a mixt. to allow complete removal of the perchloroalkane, adding a phase transfer catalyst, refluxing, extg. with aq. alkali metal hydroxide, and removing the rest of the nonpolar org. solvent. Thus, 15.00 g bisphenol A [80-05-7], 25 mL water, 10.40 g 50.62% NaOH, and 250 mL pH Me were refluxed until all water was removed, mixed with 250 mL CH2Cl2 contg. 25.47 g 4-nitro-N-methylphthalimide [41663-84-7] and 1.63 g 3-nitro-N-methylphthalimide [2593-81-9], flash distd. to remove CH2Cl2, distd. to remove 190 mL PhMe, mixed with 0.80 g Bu4NBr, refluxed 1 h, dild. with 50 mL pH Me, extd. with 120 mL 1% NaOH for 15 min, and concd. to give 32.9 g bis-etherphthalimide mixt. contg. 2,2-bis[4-(N-methylphthalimide-4-oxy)-phenyl]propane [54395-52-7] 91, 2,2-bis[4-(N-methylphthalimide-3-oxy)phenyl]propane [54395-51-6] 6, and 2,2-[4-(N-methylphthalimide-4-oxy)phenyl][4-(N-methylphthalimide-3 -oxy)phenyl]propane [63227-27-0] 3%.

Making aromatic ethers and catalyst used

Making aromatic ethers and catalyst used. Singleton, Daniel Allen (General Electric Co., USA). Eur. Pat. Appl. EP 126950 A2 5 Dec 1984, 27 pp. DESIGNATED STATES: R: DE, FR, GB, IT, NL. (English). (European Patent Organization). CODEN: EPXXDW. CLASS: IC: C07D213-74; C07D401-04; C07D209-48. There are some commonly used reagents like 626-64-2 in this article. APPLICATION: EP 84-104386 18 Apr 1984. PRIORITY: US 83-489689 28 Apr 1983. DOCUMENT TYPE: Patent CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) Section cross-reference(s): 25, 27 Pyridinium salts I (R and R1 = C1-13 hydrocarbyl, RR1 = alkylene contg. 38 C, R2 = C4-18 alkyl, Y- = an anion) are useful as phase-transfer catalysts for the prepn. of arom. ethers by the reaction of a halo- or nitroarene with an alkali metal phenoxide.Several substances are used for example 626-64-2 which is its cas registry number. The catalysts have good stability during the etherification and can the recycled. Thus, 4-hydroxypyridine [626-64-2] was treated with Bu2NH [111-92-2], neopentyl methanesulfonate [16427-42-2], and HBr to prep. 4-(dibutylamino)-N-neopentylpyridinium bromide (II) [95758-22-8]. Toluene contg. 1.0 mmol bisphenol A di-Na salt (III) [2444-90-8], 2.00 mmol N-methyl-4-nitrophthalimide (IV) [41663-84-7], and 2% II (based on III) was refluxed 2 h to give an 85% yield of the ether formed by substitution of the nitro group of IV by an ether linkage. ..