Preparation and properties of unsymmetrical benzoins and related compounds
โ Scribed by John E.T. Corrie
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- French
- Weight
- 563 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0040-4020
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โฆ Synopsis
Synthesis of unsymmetrical benzoins and their esters can be compromised by isomerisation via the enediol (or its anion). This could be avoided by suitable reaction conditions for the benzoins and their esters 2a/b and 3a/b but not for the 3-furyl compound 4a. A convenient synthesis of 3,5dimethoxy-2,4,6-trimethylbenzaldehyde 10 is described and the compound was converted to the hindered benzoin 5a.
๐ SIMILAR VOLUMES
An unexpected highly selective mono-transesterification of symmetrical acetylenedicarboxylates with various alcohols occurred in the presence of Candida rugosa lipase. This reaction allows an efficient preparation of unsymmetrical acetylenedicarboxylates and related a,b-acetylenic esters.