Hydrindene acid

Indane-2-carboxylic acid (89) has been converted in a similar manner (Scheme 16) to the hydrindene acid (90). A crucial step in the conversion of (-)-abietic acid into (+)-kaurene (93) and (-t-)-phyllo-cladene (94) involved the reduction of (91) to the mixture of epimers (92) combined with other doublebond isomers (Scheme 17). ... 

I Hydrindenic Acid Hydrindene-l-carb-oxf/lic. acid, indane-l-carboxylic acid)... 

Hydrindenic Acid Hydnndene-2-canb-axylic add, indane-2-carboxylic add). 

Hydrindenic Acid Hydrindem- -carb-oxylic acid, hydrindene-5-carboxylic add, indam-S-carboxylic acid). 

Hydrazobenzene, d757 Hydrindene, ilO Hydrocinnamic acid, pl50 Hydroquinone, d430 Hydroquinone dimethyl ether, d495 Hydroxyacetanilides, al5 thru al7 Hydroxybenzene, p65 2-Hydroxybenzenemethanol, hl07... 

Hydrindene, see Indan Hydrindonaphthene, see Indan 1,8-Hydroacenaphthylene, see Acenaphthene Hydrobroinic ether, see Ethyl bromide Hydrocarbon propellant A-17, see Bntane Hydrochloric ether, see Chloroethane Hydrofuran, see Tetrahydrofuran Hydrogen carboxylic acid, see Formic acid Hydrophenol, see Cyclohexanol Hydroqninol, see Hydroquinone Hydroqninole, see Hydroquinone a-Hydroqninone, see Hydroquinone p-Hydroqninone, see Hydroquinone 6-Hydroxyacenaphthenone, see Acenaphthene Hydroxybenzene, see Phenol... 

Hydracrylonitrile, hi 69 2-Hydrazinoethanol, hi 20 Hydrazobenzene, d673 Hydrindene, il3 Hydrocinnamic acid, pi 46 Hydroquinone, d379 Hydroquinone dimethyl ether, d433 Hydroquinonesulfonic acid, d382 Hydroxyacetanilides, al5, al6, al7... 

Diels-Alder reaction with cyclopentadienes. An improved synthesis of a key intermediate (6) to gibberellic acid (7) begins with the cycloaddition of 1 to a 2 1 mixture of 2- and l-(2-bromoallyl)cyclopentadiene (2) to give the adduct 3 in which the acetyl group has the enr/o-orientation. The silyl enol ether of 3 when heated undergoes a Cope rearrangement to give a eis-hydrindene (4), which was converted... 

Homophthalic acid has been prepared from naphthalene via phthalonic acid 1 from hydrindone by nitrosation, hydrolysis, and hydrogen peroxide oxidation 2 from hydrindene by oxidation with chromic and sulfuric acids 3 and from o-toluic acid by bromination of the acid chloride followed by treatment with alcohol and sodium cyanide and hydrolysis with 50 per cent sulfuric acid.4 Since phthalide has become commercially available, the preparation outlined above, essentially that described by Wis-licenus 5 fifty-six years ago, is by far the simplest and most economical. 

Hydrindene-1 2-dicarboxylic Acid [In-dane-1.- 2-diearboxylic aeid)... 

Hydrindene 4 sulphonic Acid IndamA-sulphonic acid)... 

Indanol-2-acetic acid, l-hydroxy-2-CttrboxymethyU hydrindene)... 

Hydrindene-2-carboxylic acid chloride added slowly at —10° to excess ethereal diazomethane, allowed to stand 12 hrs. at room temp., the ether evaporated, the remaining diazoketone dissolved in a mixture of benzyl alcohol and collidine, decomposed in batches at 180°, and the resulting benzyl ester hydrolyzed with KOH in methanol-water -> 2-hydrindylacetic acid. Y 88%. E. D. Bergmann and E. Hoffmann, J. Org. Ghem. 26, 3555 (1961). 

The allylic alcohol (209) has been found to undergo stereoselective acid-catalysed cyclization to give a mixture of the hydrindene (21()) and the decalene... 

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