Synthesis of quinolinomorphinan-4-ol derivatives as δ opioid receptor agonists
摘要:
The previously reported morphinan derivative SN-28 showed high selectivity and agonist activity for the delta opioid receptor. In the course of examining the structure-activity relationship of SN-28 derivatives, the derivatives with the 4-hydroxy group (SN-24, 26, 27) showed higher selectivities for the 8 receptor over the mu receptor than the corresponding SN-28 derivatives with the 3-hydroxy group (SN-11, 23, 28). Derivatives with the 4-hydroxy group showed potent agonist activities for the 5 receptor in the [S-35]GTPyS binding assay. Although the 17-cyclopropylmethyl derivative (SN-11) with a 3-hydroxy group showed the lowest selectivity for the delta receptor among the morphinan derivatives, the agonist activity toward the delta receptor was the most potent for candidates with the 3-hydroxy group. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis of quinolinomorphinan-4-ol derivatives as δ opioid receptor agonists
摘要:
The previously reported morphinan derivative SN-28 showed high selectivity and agonist activity for the delta opioid receptor. In the course of examining the structure-activity relationship of SN-28 derivatives, the derivatives with the 4-hydroxy group (SN-24, 26, 27) showed higher selectivities for the 8 receptor over the mu receptor than the corresponding SN-28 derivatives with the 3-hydroxy group (SN-11, 23, 28). Derivatives with the 4-hydroxy group showed potent agonist activities for the 5 receptor in the [S-35]GTPyS binding assay. Although the 17-cyclopropylmethyl derivative (SN-11) with a 3-hydroxy group showed the lowest selectivity for the delta receptor among the morphinan derivatives, the agonist activity toward the delta receptor was the most potent for candidates with the 3-hydroxy group. (C) 2011 Elsevier Ltd. All rights reserved.
We re-examined the accessory site of the 4,5-epoxymorphinan skeleton by CAMDAS conformational analysis in an effort to deign novel delta opioid receptor antagonists. We synthesized three novel compounds (SN-11, 23 and 28) with a 10-methylene bridge and without a 4,5-epoxy ring. Among them, compounds SN-23 (17-isobutyl derivative) and SN-28 (17-methyl derivative) showed very strong agonist activity (over 10 times more than TAN-67). SN-28 also showed high delta selectivity. The delta agonist activity of SN-23 was weaker than that of SN-28, but in terms of the delta selectivity, SN-23 was higher than that of SN-28. These unexpected results indicated that the 4,5-epoxy ring, but not the 10-methylene bridge, was an accessory site in delta opioid receptor agonists. (C) 2009 Elsevier Ltd. All rights reserved.
Synthesis of quinolinomorphinan-4-ol derivatives as δ opioid receptor agonists
The previously reported morphinan derivative SN-28 showed high selectivity and agonist activity for the delta opioid receptor. In the course of examining the structure-activity relationship of SN-28 derivatives, the derivatives with the 4-hydroxy group (SN-24, 26, 27) showed higher selectivities for the 8 receptor over the mu receptor than the corresponding SN-28 derivatives with the 3-hydroxy group (SN-11, 23, 28). Derivatives with the 4-hydroxy group showed potent agonist activities for the 5 receptor in the [S-35]GTPyS binding assay. Although the 17-cyclopropylmethyl derivative (SN-11) with a 3-hydroxy group showed the lowest selectivity for the delta receptor among the morphinan derivatives, the agonist activity toward the delta receptor was the most potent for candidates with the 3-hydroxy group. (C) 2011 Elsevier Ltd. All rights reserved.