Loading patent…
AssigneeTakeda Pharmaceutical Company Limited
InventorsOsamu Uchikawa, Tatsuki Koike, Takafumi Takai, Yasutaka Hoashi
Estimating the term…
The present invention provides a compound represented by the formula wherein R1 is a hydrocarbon group optionally having substituent(s), amino optionally having substituent(s), hydroxy optionally having a substituent or a heterocyclic group optionally having substituent(s), R2 is a hydrogen atom or a hydrocarbon group optionally having substituent(s), R3 is a hydrogen atom, a halogen atom, a hydrocarbon group optionally having substituent(s), amino optionally having substituent(s), hydroxy optionally having a substituent or mercapto optionally having a substituent, Xa to Xe are each a carbon atom or a nitrogen atom, m is 0 to 2, and ring A to ring C are each a ring optionally having substituent(s), or a salt thereof, which is useful as an agent for the prophylaxis or treatment of a disease relating to an action of melatonin, and the like.
A compound represented by the formula:
N-[2-(8,9-Dihydrofuro[3,2-c]pyrazolo[1,5-a]pyridin-1-yl)ethyl]acetamide, N-[2-(2-ethyl-8,9-dihydrofuro[3,2-c]pyrazolo[1,5-a]pyridin-1-yl)ethyl]acetamide, N-[2-(2-ethyl-8,9-dihydrofuro[3,2-c]pyrazolo[1,5-a]pyridin-1-yl)ethyl]propanamide, N-[2-(2-methyl-8,9-dihydrofuro[3,2-c]pyrazolo[1,5-a]pyridin-1-yl)ethyl]acetamide, N-{2-[2-(trifluoromethyl)-8,9-dihydrofuro[3,2-c]pyrazolo[1,5-a]pyridin-1-yl]ethyl}acetamide, N-[2-(7-phenyl-1,2-dihydrofuro[2,3-e]imidazo[1,2-a]pyridin-8-yl)ethyl]acetamide, N-[2-(2-phenyl-8,9-dihydrofuro[3,2-c]pyrazolo[1,5-a]pyridin-1-yl)ethyl]acetamide, or N-[2-(2-ethyl-8,9-dihydrofuro[3,2-c]pyrazolo[1,5-a]pyridin-1-yl)propyl]acetamide, or a salt thereof.
A compound represented by the formula
Dependencies are inferred from the claim text.