AMP Deaminase Inhibitors. 5. Design, Synthesis, and SAR of a Highly Potent Inhibitor Series
摘要:
A highly potent AMP deaminase (AMPDA) inhibitor series was discovered by replacing the N3 substitutents of the two lead AMPDA inhibitor series with a conformationally restricted group. The most potent compound, 3-[2-(3-carboxy-4-bromo-5,6,7,8-tetrahydroaphthyl)ethyl]-3,6,7,8-tetrahydroimidazo[4,5-d][1,3]diazepin-8-ol (24b), represents a 10- to 250-fold enhancement in AMPDA inhibitory potency without loss in the enzyme specificity. The potency of the inhibitor 24b (AMPDA K-i = 0.002 muM) is 10(5)-fold lower than the K-m for the substrate AMP. It represents the most potent nonnucleotide AMPDA inhibitor known.
Controlled synthesis of 1-vinylnaphthalenes versus (E)-α-(1,3-enyn-4-yl)-α,β-unsaturated esters from Morita–Baylis–Hillman bromides: a sequential alkynylation and competitive 6π-electrocyclization versus conjugative transposition of a triple bond
摘要:
An expedient controlled synthesis of 1-vinylnaphthalenes and various dienyne derivatives has been carried out from the Morita-Baylis-Hillman bromides and propargyl acetate or p-nitrophenyl propargyl ether. By judicious choice of base, reaction temperature, and leaving group, a selective synthesis of 1-vinylnaphthalenes and dienynes, (E)-alpha-(1,3-enyn-4-yl)-alpha,beta-unsaturated esters, could be performed. (C) 2013 Elsevier Ltd. All rights reserved.