2.5- Dimethyl-2-vinyl-4-hexenal

Some of the bicyclo[3.1.0]hexene zirconocene derivatives, especially those containing a phenyl group, rearrange quantitatively to the corresponding 4-vinyl-l-metalla-2-cyclobutene derivatives when heated in toluene to 60-80 °C for several hours (equation 131). The 6,6-dimethyl-2,3-diphenyl-2-zirconabicyclo[3.1.0]hex-3-ene derivative prefers ring-opening to the isomeric j/. -allylic complex upon thermolysis. 

Photolysis of the cyclic vinyl ketone 5,5-dimethyl-3-azido-2-cyclo-hexene-l-one (61) in aqueous tetrahydrofuran resulted in ring enlargement to the azepine (62). Irradiation of the same azide in benzene did not however lead to photodecomposition. A reaction path involving a cyclic ketene-imine was put forward. 

For propylene dimerization, four products can be written (Table II) if only vinylic C—H bonds are considered. In Paths 1 and 2 the C—H bond of the terminal carbon atom is added giving rise to two products. If the addition proceeds in the manner of metal hydrides, the product is 2-hexene (Path 1) for acidic-type addition (Markovnikov rule), the product is 4-methyl-2-pentene (Path 2). In Paths 3 and 4, the C—H bond of the middle carbon atom is added," giving rise to 2-methyl-l-pentene (hydridic-type addition) and to 2,3-dimethyl-l-butene (acidic-... 

CIC (Z)-3-hexenal and 2-(2-methylpropyl)thiazole form the fresh, green, vegetable topnote and a trace of damascenone is responsible for the floral background. On cooking, the fresh note from (Z)-3-hexenal is covered by the sweet sulphurous note of dimethyl sulfide. In canned tomatoes, the sulphurous note is supported by the spicy, dove-like aroma of 4-vinyl guaiacol and eugenol. 

Dimethyl-hexatrien-(l,3,5) l,3-Dimelhyl-3-vinyl-cydobuten + l,3-Dimetfiyl-bicydo[3.1.0]hexen-(2) — 4... 

Cinnamic acid, 2,4-diisopropyl-, ethyl ester. See Ethyl diisopropylcinnamate Cinnamic acid-1,5-dimethyl-1-vinyl-4-hexenyl ester Cinnamic acid-1,5-dimethyl-1-vinyl-4-hexen-1-yl ester. See Linalyl cinnamate Cinnamic acid, o-hydroxy-, 5-lactone. See Coumarin... 

Dimethyl-1-vinyl-4-hexen-1-ol benzoate. See Linalyl benzoate... 

Synonyms Anthranilic acid, 1,5-dimethyl-l-vinyl-4-hexenyl ester Anthranilic acid linalyl ester 3,7-Dimethyl-1,6-octadien-3-ol 2-ami nobenzoate 3,7-Dimethyl-1,6-octadien-3-yl anthranilate 1,5-Dimethyl-1-vinyl-4-hexen-1-yl-o-aminobenzoate... 

Dimethyl sulfide N,N -Di-P-naphthyl-p-phenylenediamine 2,4-Dinitrophenyl phenyl sulfide Ethyl-N-butylamine 2-Ethylhexanal 2-Ethylhexenal 2-Ethyl-2-hexenal Ethyl vinyl ketone Formamide Glyceryl-a-monochlorohydrin... 

Fig. 1. Molar optical rotation ([0] vs polymerized monomer optical purity of isotactic vinyl polymers having the asymmetric carbon atom in the oc and 3 position to the main chain. -O poly-(5)-4-methyl-l-hexene - t- poly-(5)-3,7-dimethyl-l-octene poly- (5)-l-methylpropyl]-vinyl ether.

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