Synthesis of 2-[N-(9-phenylfluoren-9-yl)amino]-1-indanones by anionic cyclization of phenylalanine-derived oxazolidinones
摘要:
A novel preparation of N-(phenylfluorenyl)-2-amino-1-indanones is described. The key step is the cyclization of aryl-substituted o-bromophenylalanine-derived oxazolidinones with n-BuLi by halogen-metal exchange followed by in situ intramolecular acylation of the aryllithium intermediate. When this method was applied to an optically pure oxazolidinone derived from an amino acid, cyclization occurred with complete retention of the integrity of the chiral center.
The invention provides certain (phenyl)-(pyrazol)-3,4-dihydroisoquinolin-2(1H)-yl)ethan-1-one compounds of formula I as D1 positive allosteric modulators (PAMs), and pharmaceutical compositions thereof. The invention further provides methods of using a compound of formula I, or a pharmaceutically acceptable salt thereof, to treat certain symptoms of Parkinson's disease, schizophrenia, ADHD or Alzheimer's disease.
A new type of chiral pyridoxamines bearing an adjacent chiral stereocenter has been developed via multi-step synthesis. The pyridoxamines displayed catalytic activity in asymmetric transamination of α-keto acids to give a variety of optically active amino acids in 27–78% yields with 34–62% ee’s under very mildconditions. This work provides a synthetic strategy to construct newchiral pyridoxamines
A Pd/norbornene-catalyzed direct meta-alkylation of nosyl-protected phenylalanine derivatives with alkyliodides is reported in moderate to good yields. The use of diisopropyl bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylate is identified as a more suitable transient mediator. A simple pyridine ligand is also essential for this reaction to proceed. No racemization was observed in this meta-methylation reaction
The invention provides certain (phenyl)-(pyrazol)-3,4-dihydroisoquinolin-2(1H)-yl)ethan-1-one compounds of formula I as D1 positive allosteric modulators (PAMs), and pharmaceutical compositions thereof. The invention further provides methods of using a compound of formula I, or a pharmaceutically acceptable salt thereof, to treat certain symptoms of Parkinson's disease, schizophrenia, ADHD or Alzheimer's disease.
本发明提供了某些作为 D1 阳性异位调节剂 (PAM) 的式 I (苯基)-(吡唑)-3,4-二氢异喹啉-2(1H)-基)乙-1-酮化合物及其药物组合物。本发明进一步提供了使用式I化合物或其药学上可接受的盐治疗帕金森病、精神分裂症、多动症或阿尔茨海默病的某些症状的方法。
PYRAZO-TETRAHYDROISOQUINOLINE DERIVATIVES AS DOPAMINE D1 RECEPTOR POSITIVE MODULATORS