3- Acetyl-2-heptenal

For the synthesis of 313 Hammond and Descoins also used a Wittig reaction 205). Thus, starting from l-hepten-3-ol 319 the phosphonium salt 320 is formed via several steps. The ylide of this salt is olefinated with atdehyde 305 to 311. Reduction of 311 and subsequent acetylation afford the pheromone 313 (Scheme 58) 205). 

Lobster Trimethylamine, 2,3-butanedione, (Z)-4-heptenal, 1-octen-3-one, 2-acetyl-1-pyrroline, 188... 

C7H11N04 trans-1-acetyl-4-hydroxy-L-proline 33996-33-7 459.15 39.973 2 11415 C7H120 1 -hepten-3-one 2918-13-0 427.35 36.950 2... 

The reagent is UKohil as initialor of radical reactions at moderalc temperatures, for example the ttdtllllun iif acetyl chloride to heptene-1... 

C12H24O Mr 184.32, is a mixture of isomers where one of the dashed lines represents a carbon-carbon double bond, the others a single bond. None of the compounds occur in nature. It is a colorless to slightly yellow liquid, df1 0.864-0.872, rej3° 1.454-1.460, with a fine woody, ambra, dry odor with a clean vetivert character. Synthesis starts from 2-methyl-2-butene (isoamylene) which is dimerized and the product acetylated to give the corresponding hepten-2-ones (see p. 18). The hepten-2-ols are obtained by reduction with NaBH [13]. The mixture is used in perfume compositions, for example, for detergents. 

A soln. of 2-acetyl-5-methyl-6-phenyl-2,3-dihydro-4H-l,2-diazepin-4-one in methanol exposed 3 hrs. to sunlight in a Pyrex flask -> 2-acetyl-5-methyl-6-phenyl-l,2-diazabicyclo[3.2.0]-6-hepten-4-one. Y 88%. F. e. s. J.-L. Derocque,W. J. Theuer, and J. A. Moore, J. Org. Chem. 33, 4381 (1968). 

Ethyl-3- [N-n-butyl-N-acetyl]-aminopropionate. See Ethyl butylacetylaminopropionate 2-Ethyi-3-butyiacroiein. See 2-Ethyl-2-heptenal 2-Ethyibutyi aicohoi. See 2-Ethyl-1-butanol Ethylbutylamine. See Ethyl-N-butylamine Ethyl-N-butylamine... 

The addition of HBr to an alkyne can be facilitated by using acetyl bromide (CHsCOBr) and alumina instead of aqueous HBr. Acetyl bromide acts as an HBr precursor by reacting with the alumina to generate HBr. For example, 1-heptyne can be converted to 2-bromo-l-heptene in good yield using this method ... 

Dihydro-1,2-diazabicyclo [3.2.0] -3-hepten-6-ones MI-312 and XII-313 and diazepinones XII-314 are readily interconvertible ring systemsand all three can give l-amino-3-pyridinol salts (see Section IV.3., p. 839) or 3-pyridinols. When heated in methanol, the 2-acetyl- or 2-benzoyl-derivative of MI-313 rearranges to several products including 6-acetamido- or 6-benzamido-3-hydroxy-4-methjd-5-phenylpyridine (XII-317) in 17% and 68% yield, respectively, presumably through intermediates such as XII-315 and... 

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