US PATENT SUBCLASS 544 / 397
.~.~.~.~.~.~.~ Chalcogen bonded directly to the carbon


Current as of: June, 1999
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544 /   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 having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazines, etc.) {6}
224  DF  .~.~.~ The six-membered hetero ring consists of two nitrogens and four carbons (e.g., 1,2-diazines, etc.) {9}
336  DF  .~.~.~.~ 1,4-diazines {9}
358  DF  .~.~.~.~.~ Piperazines (i.e., fully hydrogenated 1,4-diazines) {12}
396  DF  .~.~.~.~.~.~ Plural carbocyclic rings bonded directly to the same acyclic carbon {1}
397.~.~.~.~.~.~.~ Chalcogen bonded directly to the carbon


DEFINITION

Classification: 544/397

Chalcogen bonded directly to the carbon:

(under subclass 396) Compounds which contain chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) bonded directly to the acyclic carbon.

(1) Note. An example of a compound provided for herein is: [figure]