US PATENT SUBCLASS 548 / 231
.~.~.~.~.~.~ 3-position substituent contains ethylenic or acetylenic unsaturation or nitrogen

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}
215  DF  .~.~.~ 1,3-oxazoles (including hydrogenated) {6}
225  DF  .~.~.~.~ Chalcogen bonded directly to ring carbon of the oxazole ring {3}
229  DF  .~.~.~.~.~ Chalcogen bonded directly at 2-position of the oxazole ring {3}
231.~.~.~.~.~.~ 3-position substituent contains ethylenic or acetylenic unsaturation or nitrogen

DEFINITION

Classification: 548/231

(under subclass 229) Compounds wherein the substituent on the ring nitrogen contains nitrogen or ethylenic or acetylenic unsaturation, i.e., double or triple bond between two adjacent carbons.

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