US PATENT SUBCLASS 548 / 340.1
.~.~.~.~.~.~ Chalcogen attached indirectly to the nitrogen by acyclic nonionic bonding


Current as of: June, 1999
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548 /   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) {4}
100  DF  .~.~ Hetero ring is five-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazoles, etc.) {18}
300.1  DF  .~.~.~ 1,3-diazoles (including hydrogenated) {9}
335.1  DF  .~.~.~.~ Two double bonds between ring members of the diazole ring (i.e., imidazole) {7}
335.5  DF  .~.~.~.~.~ Nitrogen attached indirectly to the diazole ring by acyclic nonionic bonding {4}
340.1.~.~.~.~.~.~ Chalcogen attached indirectly to the nitrogen by acyclic nonionic bonding


DEFINITION

Classification: 548/340.1

(under subclass 335.5) Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached indirectly to the nitrogen by acyclic nonionic bonding.

(1) Note. This subclass contains, for example: [figure] [figure]