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4-Phenylureido/thioureido-substituted 2,2-dimethylchroman Analogs of Cromakalim Bearing a Bulky 'Carbamate' Moiety at the 6-position as Potent Inhibitors of Glucose-Sensitive Insulin Secretion

4-Phenylureido/thioureido-substituted 2,2-dimethylchroman Analogs of Cromakalim Bearing a Bulky 'Carbamate' Moiety at the 6-position as Potent Inhibitors of Glucose-Sensitive Insulin Secretion

Bernard Pirotte, Xavier Florence, Eric Goffin, Marlen Borges Medeiros, Pascal de Tullio, Philippe Lebrun

Eur J Med Chem. 2016 Oct 4;121:338-351.

PMID: 27267004

Abstract:

The synthesis of 2,2-dimethylchromans bearing a 3/4-chloro/cyano-substituted phenylureido or phenylthioureido moiety at the 4-position and an alkoxycarbonylamino ('carbamate') group at the 6-position is described. These new analogs of the potassium channel opener (±)-cromakalim were further tested on rat pancreatic islets as putative inhibitors of insulin release and on rat aorta rings as putative vasorelaxants. All compounds inhibited insulin secretion and induced a myorelaxant activity. Compound 14o [R/S-N-3-cyanophenyl-N'-(6-tert-butoxycarbonylamino-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-4-yl)urea; BPDZ 711] emerged as the most potent inhibitor of the glucose-sensitive insulin releasing process (IC50 = 0.24 μM) and displayed selectivity towards the pancreatic endocrine tissue. Radioisotopic, fluorimetric and pharmacological investigations were performed on rat pancreatic islet and rat vascular smooth muscle cells in order to decipher its mechanism of action. Our findings suggest that the mechanism of action of 14o is rather unspecific. The compound behaves as a KATP channel opener, a Ca(2+) entry blocker, and promotes an intracellular calcium translocation.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS7931521	Potassium 2-(tert-butoxycarbonylamino)pyridine-4-trifluoroborate			Price

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