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Oxaspiro octanes

Hexyl-2-oxaspiro 2.5 octane by Desulfurization Typical Procedure27 ... [Pg.655]

ETHYL 3.P-PENTAMETHYLENEGLYCIDATE (l-Oxaspiro[2,5]octane-2-carboxylic acid, ethyl ester)... [Pg.54]

The reaction involving the alkylation of p-hydroxyalkyl selenides to give p-hydroxyalkylselenonium salts which are then cyclized with a base is by far the most general. It allows Ae synthesis of a large variety of epoxides such as tenninal, a,a- and a,p-disubstituted, tri-33-> and tetra-substituted, 3,i88 as oxaspiro[2.0.n]-hexanes, -heptanes and -octanes (Scheme 161, g Scheme 162, d Scheme 164, d Scheme 165, b) - and vinyl oxiranes (Schemes 166 and 181)33 -239 from both p-hydroxy-alkyl methyl33- 3 3 22>.222j36,263 phenyl selenides. ... [Pg.712]

Oxaspiro[2,5]octane-2-carboxylic acid, ethyl ester, 34,54 Oxidation, by nitric acid, 30,48 of aldehyde to carboxyl group, 30,49 of 4-amino-3-chlorophenol, 35, 23 of an amine with hydrogen peroxide, 39, 40... [Pg.54]

Rearrangements of oxaspiro compounds such as l,5-dioxaspiro-(2,6) octane and... [Pg.227]

Tetramethyl-l-oxaspiro-(2,5)octane is conventionally obtained in a multi-step synthesis from readily available (-)-(5)- -citronellol or (H-)-(/ )-pulegone (Figure 8) [41], In the presence of acidic catalysts it rearranges to the industrially-desired 2,2,3,6-tetramethylcyclohexane carbaldehyde (17) and many other products. [Pg.227]

Isomerization of 4,4,5,8-Tetramethyl-l-oxa- piro 2.5 octane - 4,4,5,8-Tetra-methyl-l-oxaspiro[2.5]octane (1) is obtained in a multistep synthesis from easily available ( —)-(5)-P-citronellol or (+)-/ -pulegone. It reacts to the industrially-desired 2,2,3,6-tetramethyl-cyclohexane-carbaldehyde (2) (Figure 5) in the presence of acidic catalysts beside many other by-products. [Pg.157]

Oxaspiro[2,5]octane-2-carboxyhc acid, ethyl ESTER, 34, 54 Oxidation, by nitric acid, 30,48... [Pg.57]

FumagiUin ((2E,4E,6E,8 )-10- [(3R,4S,5S,6R)-5-methoxy- 4-[(2R)-2-methyl-3- (3-methylbut-2-enyl) oxiran-2-yl] -1 -oxaspiro [2.5] octan-6-yl]oxy -10-oxodeca-2,4,6,8-tetraenoic acid) and structurally related molecules as source of new drugs 12MR0126. [Pg.255]

See other pages where Oxaspiro octanes is mentioned: [Pg.40]    [Pg.147]    [Pg.456]    [Pg.277]    [Pg.951]    [Pg.59]    [Pg.214]    [Pg.951]    [Pg.111]    [Pg.1733]    [Pg.2478]    [Pg.2478]    [Pg.1261]    [Pg.227]    [Pg.222]    [Pg.951]    [Pg.871]   
See also in sourсe #XX -- [ Pg.2 , Pg.5 , Pg.49 , Pg.78 ]

See also in sourсe #XX -- [ Pg.2 , Pg.49 , Pg.78 ]



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1-Oxaspiro octane-2-carboxylic

1-Oxaspiro octane-2-carboxylic ACID, ETHYL ESTER

Oxaspiro octanes synthesis

Rearrangement of 4,4,5,8-Tetramethyl-l-oxaspiro-(2,5)octane

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