Cyanoethylation of pyrazoles under conditions of phase-transfer catalysis and hydrogenation of the cyanoethylation products
摘要:
Cyanoethylation of pyrazoles with acrylonitrile was studied under conditions of phase-transfer catalysis. The ease of the process depends on the acidity of pyrazoles. Cyanoethylpyrazoles can be converted into the corresponding aminopropylpyrazoles via reduction of the cyano group. The reduction with lithium tetrahydridoaluminate is accompanied by beta-elimination of the cyanoethyl group.
The present invention provides a compound having a superior Smo inhibitory activity and lower toxicity, which is sufficiently satisfactory as a pharmaceutical product.
The present invention provides a compound represented by the formula
wherein ring A is 5- to 7-membered ring optionally having substituent(s), where substituents are optionally bonded to each other to form a ring; X is O, S or NR
1
(R
1
is a hydrogen atom or a hydrocarbon group optionally having substituent(s)); R
2
is carbamoyl optionally having substituent(s); and R
3
is hydroxy optionally having substituent(s), or a salt thereof.
The present disclosure generally relates to compounds useful as immunomodulators. Provided herein are compounds, compositions comprising such compounds, and methods of their use. The disclosure further pertains to pharmaceutical compositions comprising at least one compound according to the disclosure that are useful for the treatment of various diseases, including cancer and infectious diseases.
The present disclosure generally relates to compounds useful as immunomodulators. Provided herein are compounds, compositions comprising such compounds, and methods of their use. The disclosure further pertains to pharmaceutical compositions comprising at least one compound according to the disclosure that are useful for the treatment of various diseases, including cancer and infectious diseases.