Low Cost Routes to Acetylenic Intermediates
Abstract
A number of palladium catalyst systems were prepared and evaluated for their rate of displacement of bromine from bromobenzene by 2-methyl-3-butyn- 2-ol. Initial results showed no rate increase over state-of-the-art catalysts. A new approach to the synthesis of 4,4'-di(3-ethynylphenoxy)diphenyl (ATS) was conceived and successfully carried out. The new method is eased upon reaction of 4,4'-di(3-bromophenoxy)diphenyl sulfone, followed by replacement of the bromines by 2-methyl-3-butyn-3-ol and hydrolytic removal of acetone. This method should provide a substantial improvement in cost over the current method which requires the use of 3-hydroxyphenylacetylene.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1979
- Accession Number
- ADB045498
Entities
People
- C. M. Selwitz
- J. J. Harrison