The preparation and purification of diphenylolpropane 4,4′-dioxyacetic acid (bisacid A2)

✍ Scribed by R. S. Lenk

• Publisher: John Wiley and Sons
• Year: 1971
• Tongue: English
• Weight: 304 KB
• Volume: 15
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1971.070150205

✦ Synopsis

Earlier work on the synthesis of bisacid A2 is reviewed. The problems associated with the achievement of a pure product in good yield are pointed out. The procedure for obtaining same is described. It is believed t,hat the melting point (or rather melting range) of bisacid A2 prepared from specially pure bisphenol-A and purified as described is higher than that of any bisacid A2 previously reported in the 1it.erature. * Nomenclature: "Bisacid AX" is a dioxy alkylic acid with X number of C atoms attached to the nonaromatic end of the ether link, including the carboxyl C. "Bisester AXY" is bisacid AX esterified with an alkanol having Y number of C atoms. (Further designation such as ~t-, iso-, etc., may be necessary.) 311