| 摘要 |
<p>1319138 Unsaturated aldehydes BADISCHE ANILIN- & SODA-FABRIK AG 14 Oct 1970 [15 Oct 1969] 48804/70 Heading C2C Penta-2,4-dien-1-als of formula where R<SP>1</SP> and R<SP>2</SP> independently denote C 1-40 hydrocarbon radicals which may have oxygencontaining substituents and R<SP>1</SP> may also denote H, or R<SP>1</SP> and R<SP>2</SP> complete a 5- to 7-membered ring, and R<SP>3</SP> is alkyl, are prepared by reacting a propargyl alcohol of formula with anα-formylcarboxylic ester of formula where R<SP>4</SP> is alkyl, at 100‹ to 350‹ C. 2,5,9-Trimethyldeca - 2,4,9 - trien - 1 - al, 9 - methoxy- 2,5,9 - trimethyldeca - 2,4 - dien - 1 - al, 2,5,9- trimethyldeca - 2,4 - dien - 1 - al, 2,5,9,13- tetramethyltetradeca - 2,4,8,11 - tetraen - 1 - al and 6 - ethyl - 2 - methyl - deca - 2,4 - dien - 1- al are claimed per se.</p> |
