US PATENT SUBCLASS 549 / 392
.~.~.~.~.~.~.~ Chalcogen bonded directly to the hetero ring

Current as of: June, 1999
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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}
381  DF  .~.~.~.~ Polycyclo ring system having the hetero ring as one of the cyclos {4}
385  DF  .~.~.~.~.~ Tricyclo ring system having the hetero ring as one of the cyclos {4}
388  DF  .~.~.~.~.~.~ The tricyclo ring system consists of three six-membered cyclos (e.g., xanthene, etc.) {4}
392.~.~.~.~.~.~.~ Chalcogen bonded directly to the hetero ring {1}
393  DF  .~.~.~.~.~.~.~>.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to the tricyclo ring system

DEFINITION

Classification: 549/392

(under subclass 388) Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to the hetero ring of the tricyclo ring system.

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