US PATENT SUBCLASS 546 / 261
.~.~.~.~ Chalcogen bonded directly to ring carbon of pyridine or partially hydrogenated pyridine ring

Current as of: June, 1999
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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}
255  DF  .~.~.~ Plural pyridine or partially hydrogenated pyridine rings {6}
261.~.~.~.~ Chalcogen bonded directly to ring carbon of pyridine or partially hydrogenated pyridine ring

DEFINITION

Classification: 546/261

Chalcogen bonded directly to ring carbon of pyridine or partially hydrogenated pyridine ring:

(under subclass 255) Compounds containing chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) which is bonded directly to a ring carbon of a pyridine or partially hydrogenated pyridine ring.

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

SEE OR SEARCH THIS CLASS, SUBCLASS:

188, for tautomers of chalcogen attached directly to pyridine or partially hydrogenated pyridine (i.e., chalcogen double bonded directly to piperidine), e.g., [figure]