US PATENT SUBCLASS 549 / 399
.~.~.~.~.~.~.~ 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}
396  DF  .~.~.~.~.~ Bicyclo ring system having the hetero ring as one of the cyclos {2}
398  DF  .~.~.~.~.~.~ The bicyclo ring system consists of the hetero ring and a six-membered carbocyclic ring {6}
399.~.~.~.~.~.~.~ Chalcogen bonded directly to the hetero ring {2}
400  DF  .~.~.~.~.~.~.~>.~ Plural chalcogens bonded directly to the hetero ring
401  DF  .~.~.~.~.~.~.~>.~ Chalcogen bonded directly to the ring carbon para to the ring oxygen (e.g., chromones, etc.) {2}


DEFINITION

Classification: 549/399

(under subclass 398) Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to the hetero ring of the bicyclo ring system.

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

[figure]