Organic compounds -- part of the class 532-570 series – Organic compounds – Chalcogen in the nitrogen containing substituent
Reexamination Certificate
2006-05-23
2006-05-23
Desai, Rita (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Chalcogen in the nitrogen containing substituent
C544S101000, C544S250000, C544S345000, C546S082000, C546S118000
Reexamination Certificate
active
07049437
ABSTRACT:
The present invention provides a process of a compound of the formula (I):wherein R is heteroaryl or the like, ring A is a heteroalicyclic group or the like comprising reacting a compound of the formula (II):wherein Hal is halogen and the other symbols are the same as the above, in the presence of a sulfinic acid salt and further in the presence of an acid or a salt with an organic base, and a novel crystal form of 2-(3-isoxazolyl)-3,6,7,9-tetrahydroimidazo[4,5-d]pyrano[4,3-b]pyridine phosphate monohydrate.
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patent: 556008 (1993-08-01), None
M. Adachi et al., “Intermolecular Transfer of . . . Pyridines”, Tetrahedron Letters, vol. 37, No. 49, pp. 8871-8874, 1996.
M. Ichikawa et al., “Acidic Properties . . . Imidazole”, Chem. Pharm. Bull., vol. 27, No. 5, pp. 1255-1264, 1979.
M. Adachi et al., “Intermolecular Transfer of an Alkenyl Group in Enamines: Application to Synthesis of [b]-Fused Pyridines”, Tetrahedron Letters, vol. 37, No. 49, pp. 8871-8874, 1996.
M. Ichikawa et al., “Acidic Properties of Benzimidazoles and Substituent Effects. IV.” Relationship Between the Acidities of N'-(Subtituted Phenyl)arylamidines and Ring Closures to Imidazole, Chem. Pharm. Bull, vol. 27, No. 5, pp. 1255-1264, 1979.
Abstract of the 23rdCongress of Heterocyclic Chemistry, pp. 97-99, 1992 with English translation.
Matsubara Fumihiko
Ohya Takashi
Uenaka Masaaki
Covington Raymond
Desai Rita
Shionogi & Co. Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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