Bicyclo hept

The monomer, norbomene (or bicyclo[2.2.l]hept-2-ene), is produced by the Diels-Alder addition of ethylene to cyclopentadiene. The monomer is polymerised by a ring-opening mechanism to give a linear polymer with a repeat unit containing both an in-chain five-membered ring and a double bond. Both cis-and trans- structures are obtainable according to the choice of catalyst used ... [Pg.306]

The geometry of bicyclic rings can also cause distortion of the alkene bond from coplanarity. An example is bicyclo[2.2.1]hept-l-ene ... [Pg.165]

Hybridalactone, a novel marine derived eicosanoid from Laurencia hybrida, appears to be biosynthesized by a unique pathway from eicosapentaenoic acid. The synthesis of hybridalactone was carried out enantiospecifically from (+)-bicyclo[3.2.0]hept-4-ene-l-one so as to provide proof of stereochemistry (Ref. 4). [Pg.307]

Corrole is a tetrapyrrolic macrocycle 1-Norbomyl is a bicyclo[2.2.1]hept-l-yl... [Pg.1117]

The dicarboxylic acid is prepared as in Chapter 8, Section I by heating the anhydride in water until dissolution is complete. c f7o-Bicyclo[2.2.1]hept-2-ene-5,6-dicarboxylic acid has mp 180-182°. [Pg.78]

Chemical Name 3-bicyclo[2.2.1 ] hept-5-en-2-yl-6-chloro-3,4-dihydro-2H-1,2,4-benzothiadi-azine 7-sulfonamide 1,1-dioxide... [Pg.418]

Phthalimide, potassium [ 1H Isomdole-l,3(2//)-dione, potassium salt], 96 Phth-Gly.Gly-OEt [Glycine, N [(1,3-dihydro-1,3-dioxo-2//-isoindol-2-yl)acelyl], ethyl ester], 93 a-Pinene [Bicyclo 3.1.1]hept 2-ene,... [Pg.143]

On heating, bicyclo[2.2.1]hept-2,3-en-7-ones (48) usually lose CO to give cyclohexadienes, in a type of reverse Diels-Alder reaction. Bicyclo[2.2.1]hepta-dienones (49) undergo the reaction so readily (because of the stability of the benzene... [Pg.1347]

CN 2-(l-bicyclo[2.2.1]hept-5-en-2-yl-l-phenylethoxy)-(V,(V-diethyl-A/-methylethanaminium bromide... [Pg.462]

CN 3-bicyclo[2.2.1]hept-5-en-2-yI-6-chIoro-3,4-dihydro-2//-l,2,4-benzothiadiazine-7-sulfonamide 1,1-... [Pg.564]

Cycloaddition of bicyclo[2.2.1]hept-2-ene-2,3-dicarboxylic anhydride 81 with cyclopentadiene was also studied by Bartlett et al., who found exclusive top addition, the top-endo/top-exo ratio being 3 2 [147]. The endolexo ratio is significantly different from that of 80 (60-70 1). The observed top selectivity in norbornadiene (80) and norbomene (81) derivatives is consistent with the inherent top reactivity of norbomanone 25 and norbomene 57. Orbital unsymmetrization of the dienophile... [Pg.162]

A different but complementary approach incorporated ethyl 2-aza-bicyclo[2.2.1]hept-3-ene acetate 11 to deliver the glycine aldimine component for the Maimich reaction through a... [Pg.19]

Trimethylsilyloxybicyclo[4.1.0]heptane Silane, (bicyclo[4.1.0]-hept-l-yloxy)trimethyl- (8,9) (38858-74-1)... [Pg.62]

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