US PATENT SUBCLASS 546 / 161
.~.~.~.~.~.~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to the carbocyclic ring

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546 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
*  DD  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1) {1}
1  DF  .~.~ Hetero ring is six-membered consisting of one nitrogen and five carbons {24}
26  DF  .~.~.~ Polycyclo ring system having the six-membered hetero ring as one of the cyclos {9}
112  DF  .~.~.~.~ Bicyclo ring system having the six-membered hetero ring as one of the cyclos {7}
152  DF  .~.~.~.~.~ Quinolines (including hydrogenated) {14}
159  DF  .~.~.~.~.~.~ Nitrogen, other than as nitro or nitroso, attached directly to the six membered hetero ring by nonionic bonding {2}
160  DF  .~.~.~.~.~.~.~ Unsaturated carbocyclic ring bonded directly to the nitrogen {1}
161.~.~.~.~.~.~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to the carbocyclic ring

DEFINITION

Classification: 546/161

Having -C(=X)-, wherein X is chalcogen, bonded directly to the carbocyclic ring:

(under subclass 160) Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly to the carbocyclic ring.

(1) Note. Examples of compounds provided for herein are: [figure] [figure]