US PATENT SUBCLASS 585 / 350
ALICYCLIC COMPOUND SYNTHESIS

Current as of: June, 1999
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585 /   HD   CHEMISTRY OF HYDROCARBON COMPOUNDS

350ALICYCLIC COMPOUND SYNTHESIS {11}
351  DF  .~> Carotene or derivative
352  DF  .~> Adamantane or derivative
353  DF  .~> By shift, opening, or removal of shared-carbon ring {2}
357  DF  .~> From nonhydrocarbon {2}
360  DF  .~> Polycyclic product {2}
364  DF  .~> By condensive ring expansion, e.g., "olefin dismutation", etc.
365  DF  .~> From nonring hydrocarbon {1}
371  DF  .~> By ring expansion or contraction {2}
375  DF  .~> By alkylation or alkyl transfer {1}
377  DF  .~> By double-bond shift {1}
379  DF  .~> By dehydrogenation {1}

DEFINITION

Classification: 585/350

ALICYCLIC COMPOUND SYNTHESIS:

(under the class definition) Subject matter wherein a chemical change produces a hydrocarbon which is cyclic or has a cyclic moiety, the hydrocarbon having no aromatic rings.

(1) Note. This subclass is the locus for patents drawn to certain skeletal isomerization phenomena which yield a monocyclic compound. Such phenomena include:

(a)

a change in the relative position of the alkyl group on a ring, such as a shift of an alkyl group from the ortho to the meta or para position thereon, (b) a change of the side-chain size in which a portion of the alkyl group is transferred to another position on the ring, but the total number of carbon atoms on the ring remains the same, (c) a rearrangement of the side-chain on a ring, for example, a normal propyl group on the ring changed into an isopropyl, (d) a change from a cisconfiguration to a trans-configuration.

SEE OR SEARCH THIS CLASS, SUBCLASS:

266+, for hydrogenation of an aromatic to produce an alicyclic.

317+, for production of an alicyclic by serial diverse syntheses.

353, and 360, for skeletal isomerization processes which produce a polycyclic nonaromatic.

365+, for production of an alicyclic ring from a nonring hydrocarbon by a cyclization isomerization.

371+, for isomerizaton of a larger-ring compound to a smaller-ring compound and vice versa.

377+, for double bond shift isomerization to produce a monocyclic nonaromatic.

476+, and 477+, for skeletal isomerization processes which produce a compound having an aromatic ring.

600, 601 and 671, for skeletal isomerization processes which produce an olefin.

734+, for skeletal isomerization processes which produce a paraffin.

SEE OR SEARCH CLASS

208, Mineral Oils: Processes and Products,

133+, for reforming mineral oils which may include isomerization.