Pd(II)‐Catalyzed Ligand Controlled Synthesis of Pyrazole‐4‐carboxylates and Benzo[b]thiophene‐3‐carboxylates.

Yogesh Daulat Dhage,Hiroki Daimon,Cheng Peng,Taichi Kusakabe,Keisuke Takahashi,Yuichiro Kanno,Yoshio Inouye,Keisuke Kato

Pd(II)‐Catalyzed Ligand Controlled Synthesis of Pyrazole‐4‐carboxylates and Benzo[b]thiophene‐3‐carboxylates.

2015

Yogesh Daulat Dhage
Hiroki Daimon
Cheng Peng
Taichi Kusakabe
Keisuke Takahashi
Yuichiro Kanno
Yoshio Inouye
Keisuke Kato

The cyclization-carbonylation of alkynyl hydrazones (I) proceeds readily in the presence of palladous trifluoroacetate in DMSO leading to pyrazole-4-carboxylates (IV) in good to high yields.

Keywords:

Carbonylation
Pyrazole
Catalysis
Thiophene
Medicinal chemistry
Ligand
Organic chemistry
Chemistry

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