US PATENT SUBCLASS 549 / 416
.~.~.~.~ Chalcogen bonded directly to the hetero ring


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



549 /   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) {2}
200  DF  .~.~ Oxygen containing hetero ring (e.g., dioxirane, etc.) {16}
356  DF  .~.~.~ The hetero ring is six-membered {9}
416.~.~.~.~ Chalcogen bonded directly to the hetero ring {6}
417  DF  .~.~.~.~.~> Plural chalcogens bonded directly to the hetero ring {1}
419  DF  .~.~.~.~.~> Nitrogen attached directly or indirectly to the hetero ring by acyclic nonionic bonding
420  DF  .~.~.~.~.~> Having -C(=X)-, wherein X is chalcogen, attached directly or indirectly to the hetero ring by acyclic nonionic bonding
421  DF  .~.~.~.~.~> Alicyclic ring bonded directly to the chalcogen
422  DF  .~.~.~.~.~> Five-membered carbocyclic ring having the hetero ring as part of one substituent and -COO- as part of another substituent (e.g., prostaglandin intermediates, etc.)
423  DF  .~.~.~.~.~> Hydroxy or halogen attached directly or indirectly to the hetero ring by acyclic nonionic bonding (H of -OH may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal)


DEFINITION

Classification: 549/416

(under subclass 356) Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to the hetero ring.

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