US PATENT SUBCLASS 987 / 87
.~.~.~.~.~ N atom of ring is bonded directly to a P atom or is indirectly bonded to a P atom other than through a ring atom of the five-membered ring (9/6506E)


Current as of: June, 1999
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987 /   HD   ORGANIC COMPOUNDS CONTAINING A Bi, Sb, As, OR P ATOM OR CONTAINING A METAL ATOM OF THE 6TH TO 8TH GROUP OF THE PERIODIC SYSTEM

30  DF  PHOSPHORUS COMPOUNDS (9/02; 9/06) {15}
49  DF  .~ Ring is devoid of a P or a metal atom and contains at least one hereto atom (O, S, N, Se, or Te) and may or may not contain C (9/547; 9/6524) {9}
75  DF  .~.~ Exactly two N's as only hetero atom in ring (9/645) {2}
84  DF  .~.~.~ Five-membered ring containing two N's (9/6503; 9/6503B2; 9/6503B2G; 9/6503B2K; 9/6503B2R) {3}
85  DF  .~.~.~.~ N in 1 and 3 ring positions (9/6506; 9/6506G; 9/6506K; 9/6506R) {2}
87.~.~.~.~.~ N atom of ring is bonded directly to a P atom or is indirectly bonded to a P atom other than through a ring atom of the five-membered ring (9/6506E)


DEFINITION

Classification: 987/87

N atom of ring is bonded directly to a P atom or is indirectly bonded to a P atom other than through a ring atom of the five-membered ring (9/6506E):

(under subclass 85) Subject matter wherein an extracyclic phosphorus atom is directly or indirectly bonded to a nitrogen atom of the ring.

(1) Note. Indirectly as used in this subclass is meant to exclude compounds wherein a phosphorus atom is first bonded to a ring carbon, either directly or indirectly, and which ring carbon is eventually bonded to a nitrogen atom of the same ring.