US PATENT SUBCLASS 548 / 113
.~.~.~.~ Polycyclo ring system having the five-membered hetero ring as one of the cyclos

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}
112  DF  .~.~.~ Phosphorus attached indirectly to the five-membered hetero ring by nonionic bonding {4}
113.~.~.~.~ Polycyclo ring system having the five-membered hetero ring as one of the cyclos {1}
114  DF  .~.~.~.~.~> The polycyclo ring system and phosphorus are both bonded directly to the same chalcogen

DEFINITION

Classification: 548/113

(under subclass 112) Compounds wherein the five-membered hetero ring is one of the cyclos of a polycyclo ring system.

(1) Note. Compounds in which phosphorus is attached directly by nonionic bonding to any ring of the polycyclo ring system other than the five-membered hetero ring are provided for herein as the attachment of the phosphorus to the five-membered hetero ring is considered to be indirect.

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