Synthesis and opioid activity of enantiomeric N-substituted 2,3,4,4a,5,6,7,7a-octahydro-1H-benzofuro[3,2-e]isoquinolines.

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Hsin LW, Chang LT, Rothman RB, Dersch CM, Fishback JA, Matsumoto RR

Synthesis and opioid activity of enantiomeric N-substituted 2,3,4,4a,5,6,7,7a-octahydro-1H-benzofuro[3,2-e]isoquinolines.

J Med Chem. 2010 Feb 11;53(3):1392-6. doi: 10.1021/jm901503e.

PubMed ID

20055417 [ View in PubMed

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Abstract

A series of enantiomeric N-substituted 2,3,4,4a,5,6,7,7a-octahydro-1H-benzofuro[3,2-e]isoquinolines was synthesized. The (-)-enantiomers had much greater kappa-, mu-, and delta-opioid receptor binding affinity than the corresponding (+)-enantiomers. Compounds (-)-1a, (-)-1b, and (-)-1c displayed subnanomolar binding affinity for the mu-receptor, and (-)-1b had a high affinity for the kappa-receptor. Compound (-)-1a was a mu-partial agonist and kappa-antagonist. Compound (-)-1b was a potent neutral mu-antagonist (K(d) = 0.22 nM) and a kappa-partial agonist.

DrugBank Data that Cites this Article

Binding Properties

Drug	Target	Property	Measurement	pH	Temperature (°C)
Naloxone	Kappa-type opioid receptor	Ki (nM)	3	N/A	N/A	Details
Naloxone	Mu-type opioid receptor	Ki (nM)	0.98	N/A	N/A	Details