123575-49-5

Upstream product

• 111993-79-4 2-(4-hydroxyphenyl)-2,3,4,4a-tetrahydro-5H-⁽¹⁾benzothiopyrano[4,3-c]-pyridazin-3-one 
• 108-14-5 2-chloro-1-dimethylaminopropane 

Relevant academic research and scientific papers

Fused pyridazine compounds and their pharmaceutical use

Fused pyridazine compounds STR1 wherein R1, R2, R3 and R4 are the same or different and respectively hydrogen, a halogen, hydroxy, nitro, amino, cyano, trifluoromethyl, and alkyl, an alkoxy or an alkanoylamino; one of Ra and Rb is a group of the formula wherein R5 and R6 are the same or different and respectively hydrogen, an alkyl, a phenylalkyl or a substituted phenylalkyl or a group forming a heterocycle together with the adjacent nitrogen atom and Y stands for a straight- or branched-chain alkylene which may have hydroxy group as a substituent on the chain, and the other is hydrogen, or both of Ra and Rb are the same or different and respectively a group of the formula wherein R5 and R6 are of the same meanings as defined above; W is =CH-- or =N; X is CH2, S, SO, SO2 or O; and the bond designated by a broken line in its part stands for a single bond or a double bond, or their pharmaceutically acceptable salts or hydrates and their pharmaceutical use. Said compounds possess stimulating effects on phagocytosis of leukocytes and macrophages, restorative effects on leukopenia, protective effects against infection, antitumor actions and the like and thus they are useable for the prophylaxis or therapy of human diseases accompanied by immunodeficiency.