US PATENT SUBCLASS 546 / 54
.~.~.~.~.~.~.~.~.~ Plural chalcogens bonded directly to the same cyclo as is the -(C=X)- group

Current as of: June, 1999
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546 /   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) {1}
1  DF  .~.~ Hetero ring is six-membered consisting of one nitrogen and five carbons {24}
26  DF  .~.~.~ Polycyclo ring system having the six-membered hetero ring as one of the cyclos {9}
42  DF  .~.~.~.~ Pentacyclo ring system having the six-membered hetero ring as one of the cyclos {3}
47  DF  .~.~.~.~.~ Plural ring hetero atoms in the pentacyclo ring system {2}
49  DF  .~.~.~.~.~.~ Two ring nitrogens in the pentacyclo ring system (e.g., quinacridones, etc.) {2}
50  DF  .~.~.~.~.~.~.~ Ring nitrogen is shared by two of the cyclos (e.g., yohimbanes, etc.) {2}
53  DF  .~.~.~.~.~.~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to ring carbon of the pentacyclo ring system and also bonded directly to chalcogen or nitrogen {1}
54.~.~.~.~.~.~.~.~.~ Plural chalcogens bonded directly to the same cyclo as is the -(C=X)- group {1}
55  DF  .~.~.~.~.~.~.~>.~.~.~ Trialkoxybenzoyl bonded directly to at least one of the chalcogens (e.g., reserpine, etc.)

DEFINITION

Classification: 546/54

Plural chalcogens bonded directly to the same cyclo as is the -C(=X)- group:

(under subclass 53) Compounds wherein at least two chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) are bonded directly to the same cyclo as is the group.

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