The Synthesis of Some Derivatives Based on the 4-Benzyl-1H-pyrazole-3,5-diamine Core
摘要:
The three-step synthesis of 4-benzyl-1H-pyrazole-3,5-diamines 2 from commercially available aldehydes 3 is given. The Knoevenagel condensation was utilized to assemble the initial carbon framework, resulting in the benzylidenemalononitriles 4 which were directly transformed by the reduction of the electron deficient C=C bond to benzylmalononitriles 5. Subsequent cycloaddition of hydrazine with 5 afforded the desired pyrazoles 2. Due to the high similarity with 4-arylazo-1H-pyrazole-3,5-diamines, the biological activities of the 4-benzyl-1H-pyrazole-3,5-diamines 2 were evaluated while focusing on the inhibition of cyclin-dependent kinases (CDKs), but no significant results were obtained.
The Synthesis of Some Derivatives Based on the 4-Benzyl-1H-pyrazole-3,5-diamine Core
摘要:
The three-step synthesis of 4-benzyl-1H-pyrazole-3,5-diamines 2 from commercially available aldehydes 3 is given. The Knoevenagel condensation was utilized to assemble the initial carbon framework, resulting in the benzylidenemalononitriles 4 which were directly transformed by the reduction of the electron deficient C=C bond to benzylmalononitriles 5. Subsequent cycloaddition of hydrazine with 5 afforded the desired pyrazoles 2. Due to the high similarity with 4-arylazo-1H-pyrazole-3,5-diamines, the biological activities of the 4-benzyl-1H-pyrazole-3,5-diamines 2 were evaluated while focusing on the inhibition of cyclin-dependent kinases (CDKs), but no significant results were obtained.
Novel Pyrimidine- And Triazine-Hepcidine Antagonists
申请人:Dürrenberger Franz
公开号:US20120202806A1
公开(公告)日:2012-08-09
The present invention relates to new hepcidin antagonists, pharmaceutical compositions containing them and the use thereof as a drug, in particular for the treatment of iron metabolism disorders such as, in particular, iron deficiency diseases and anaemia, in particular anaemia associated with chronic inflammatory disease (ACD: anaemia of chronic disease and AI: anaemia of inflammation).
Asymmetric Mannich Reaction of N-Boc Imines with Alkylmalononitriles Catalyzed by Dinuclear PhosphoiminoBINOL-Pd Complex
作者:Takayoshi Arai、Ayu Nakamura
DOI:10.1055/s-0037-1611842
日期:2019.7
PhosphoiminoBINOL-Pd2(OAc)2 complex catalyzed asymmetricMannichreaction of N-Boc imines with alkyl malononitriles, with assistance of Zn(OAc)2 gave chiral amines with adjacent all-carbon quaternary carbon centers in up to 99% yield with 94% ee.
Chiral Dinuclear Benzyliminobinaphthoxy‐Palladium Catalyst for Asymmetric Mannich Reaction of Aldimines and Isatin‐Derived Ketimines with Alkylmalononitriles
A newly developed dinuclear bis(benzylimino)binaphthol (BIB )−Pd complex showed good catalytic activity for the Mannichreaction of aldimines and isatin‐derived ketimines with alkylmalononitriles to give the products in a highlyenantioselective manner.
Chiral Primary Amine Catalyzed Asymmetric Michael Addition of Malononitrile to α-Substituted Vinyl Ketone
作者:Niankai Fu、Long Zhang、Sanzhong Luo
DOI:10.1021/ol503566a
日期:2015.1.16
The first efficient and highly enantioselective Michael addition–protonation reaction of malononitriles to α-substitutedvinylketones has been developed by using a chiral primary amine as the organocatalyst. With a Hantzsch ester as the hydride source, an enantioselective tandem reduction, Michael addition–protonation reaction of benzylidenemalononitrile has also been achieved with good yields and