Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Reexamination Certificate
2005-05-03
2005-05-03
McKenzie, Thomas C. (Department: 1624)
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
Reexamination Certificate
active
06887997
ABSTRACT:
Fused tri-heterocyclic compounds of formula:R1is H or alkyl; R2is H, alkyl, alkenyl, aryl, heteroaryl, cyclyl, or heterocyclyl; R3and R4, independently, is H, alkyl, alkenyl, aryl, heteroaryl, cyclyl, heterocyclyl, or (CRaRb)mX(CRcRd)nY; in which X is a bond, O, S, or NRe; Y is alkoxy, aryloxy, heteroaryloxy, OC(O)Re, C(O)Re, N(ReRe′), NReC(O)Re′, S(O)2Re, or SRe; each of m and n, independently, is 1, 2, 3, 4, or 5; each of Ra, Rb, Rc, Rd, Re, and Re′, independently, is H, alkyl, aryl, heteroaryl, cyclyl, or heterocyclyl; and R5is H or halogen.
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Hua Xiao Xu
Lee Fang Chen
Lee Fang Yu
Wu Xu Ai
Yang Chang An
McKenzie Thomas C.
Yung Shin Pharmaceutical Ind. Co., Ltd.
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