4-Methyl-2-nonene

E,4S)-4-methyl-2-nonene (2E,4R)-4-methyl-2-nonene (2Z,4S)-4-methyl-2-nonene (2Z,4R)-4-methyl-2-nonene A B C D... 

So ergibt z. B. die Photolyse von 5-Nitrito-5-methyl-nonen 2-Methyl-5-hydrox-iminomethyl-2-butyl-tetrahydrojuran (19% d.Th.) und unumgesetztes Ausgangsmaterial ... 

Methyl-nonen-(4)-oI-(l Oder 9), Tieileioht auoh 6-Me(hylea-notuuiol-(l) 1 II494. 

Methyl-nonen.(3)-dic arbona iixe.(1.4), mono thyleater 2 II668. 

See stmcture (107). This 4,5-position is saturated. 5-Isopropyl-8-methyl-6,8-nonadien-2-one. 5-Isopropyl-3-nonene-2,8-dione. 

Rhodium catalyst is used to convert linear alpha-olefins to heptanoic and pelargonic acids (see Carboxylic acids, manufacture). These acids can also be made from the ozonolysis of oleic acid, as done by the Henkel Corp. Emery Group, or by steam cracking methyl ricinoleate, a by-product of the manufacture of nylon-11, an Atochem process in France (4). Neoacids are derived from isobutylene and nonene (4) (see Carboxylic acids, trialkylacetic acids). 

Die kathodische Cyclisierung von 8-Oxo-nonen-(2) fuhrt in guter Ausbeute (50% d.Th.) zu 1 -Methyl-2-dthyl-cyclohexanol9A0. 

Dioxo-6f -methyl-2-(2-carboxy-dthyl)-bicyclo[4.3.0] nonen-( 1 23°/() d.Th. 

Beim 3,7-Dioxo-6-methyl-bicyclo[4.3.0]nonen-(l) vermag Curvularia falcata (Teflon) Boedijn bei Einhaltung bestimmter Bedingungen zwischen der (6R)- und der (6S)-Form zu unterscheiden3 (nur das 5-Derivat wird reduziert) ... 

H6]-Leukotriene A4 methyl ester, 17, has been synthesized14 by Wittig olefination of epoxy dienal 18 with the key reagent 3,4,6,6,7,7-[2H6]-(Z)-(3-nonen-1-yl)triphenylphosphonium iodide, 19 (equation 9). 17 is employed as stable isotope internal standard for the MS trace analysis of eicosanoids15-17. 

Preparation of 9,9-Dihydro-9-Hydroxyperfluoro-(3,6-Dioxa-5-Methyl-l-Nonene) (5)... 

Methyl-3-nitro-l-nonene (427) and sodium phenylthiolate show different modes of behaviour under different conditions in HMPA the product 428 of attack at the less hindered carbon atom is obtained, whereas in the presence of Pd(PPh3)4 the isomer 429 is produced457. 

Mix 230 ml of dry ethanol with 32.5 g of sodium methoxide under a nitrogen atmosphere until the methoxide is dissolved. Add 110 g of diethyl malonate and stir for 10 min, then add 75 g of 3-nonene-2-one (or equimolar amount of 5,6-dimethylundec-3-ene-2-one for dimethyl-heptyl) keeping the temp below 49° with external cooling. Stir and reflux for 3 hours, cool to room temp, neutralize with coned HCL add (about 45 ml), and let stand for 8-12 hours. Evaporate in vacuo, and dissolve the residue in 1 N HCl acid and 800 ml ethylacetate. Allow to stand to separate the ethyl acetate, then wash it (the acetate) with two 300 ml portions of water and extract with a saturated solution of NaHCOs until a small sample shows no turbidity upon acidification (it will take at least nine 100 ml portion extractions). Combine the NaHCOs extractions and very carefully acidify them with tiny portions of acid. Extract with three 300 ml portions of ether, and remove the ether by evaporation in vacuo after drying with MgS04 to get the methyl-carboxylate. 

Methyl 2-bromo-2-cyclopropylideneacetate (11a) has never been tested in these reactions, but has been used as a starting material for the stepwise construction of 1,6-heptadienes with methylenecyclopropane units for intramolecular Heck reactions. Thus, bromo ester 11a, after reduction, subsequent conversion of the resulting alcohol to the bromide and coupling with enolates of substituted malonates, was transformed into dienes of the type 254 (Scheme 73) - versatile synthetic blocks for the preparation of functionally substituted spirocyclopropanated bicyclo[4.3.0]nonenes 255a-d by a domino Heck-Diels-Alder reaction [122a]. 

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