Synthesis and biological evaluation of novel (−)-cercosporamide derivatives as potent selective PPARγ modulators
摘要:
Selective peroxisome proliferator-activated receptor gamma (PPAR gamma) modulators are expected to be a novel class of drugs improving plasma glucose levels without PPAR gamma-related adverse effects. As a continuation of our studies for (-)-Cercosporamide derivatives as selective PPAR gamma modulators, we synthesized substituted naphthalene type compounds and identified the most potent compound 15 (EC50 = 0.94 nM, E-max), = 38%). Compound 15 selectively activated PPAR gamma transcription and did not activate PPAR alpha and PPAR delta. The potassium salt of compound 15 showed a high solubility and a good oral bioavailability (58%). Oral administration of the potassium salt remarkably improved the plasma glucose levels of female Zucker diabetic fatty rats at 1 mg/kg. Moreover, it did not cause a plasma volume increase or a cardiac enlargement in Wistar-Imamichi rats, even at 100 mg/kg. (C) 2012 Elsevier Masson SAS. All rights reserved.
A metal-free cascade reaction strategy has been developed for the synthesis of novel polycyclic 2-formylthiophenes from β-halo-α,β-unsaturatedaldehydes and 1,4-dithiane-2,5-diol. Recyclable polymer supported organic base was used to perform the reaction process. This synthetic protocol was applied to synthesize several novel polycyclic thiophenes including steroidal D-ring annelated thiophene. Our
The present invention relates to a novel cercosporamide derivative, a pharmacologically acceptable salt thereof or an ester thereof which has an excellent hypoglycemic effect and is useful as a therapeutic and/or prophylactic agent for diabetes.
A cercosporamide derivative having the general formula (I):
[wherein X represents an oxygen atom or the like, R
1
represents a hydrogen atom or a C
1
-C
6
alkyl group, R
2
represents a hydrogen atom, a C
1
-C
6
alkyl group or a C
1
-C
6
halogenated alkyl group, R
3
represents a hydrogen atom or a C
1
-C
6
alkyl group, R
4
represents a C
6
-C
10
aryl group which may be substituted with one to five group(s) independently selected from Substituent Group a, or the like, n represents 1, 2 or 3, and Substituent Group a represents a halogen atom, a C
1
-C
6
alkyl group, a C
1
-C
6
halogenated alkyl group, a C
2
-C
6
alkenyl group, a C
2
-C
6
alkynyl group, a C
1
-C
6
alkoxy group, a C
1
-C
6
halogenated alkoxy group, a C
2
-C
6
alkenyloxy group, a C
2
-C
6
alkynyloxy group and the like], a pharmacologically acceptable salt thereof or an ester thereof.
Organocatalytic Approach for the Synthesis and Biological Studies of Naphthalene Fluorescent Probe through Hydrogen Transfer Reaction
作者:Madan Sau、Sapana Dubey、Jigyansa Sahoo、Gokarneswar Sahoo、Pragya Trivedi、Avijit Jana、Subhankar Samanta、Tapas Das
DOI:10.1002/ejoc.202201188
日期:2022.12.12
Herein we report an organocatalytic synthesis of highly fluorescent naphthalene derivatives through hydrogen atom transfer featuring neat and mild reaction conditions under air with high substrate tolerance along with atom economy by the unprecedented use of DBU, where oxidation and reduction occurred in one-pot. Synthesized compounds are utilized in photophysical studies, cytotoxic studies and cell