Synthesis of α-difluoro and α-difluoro-β-trifluoroketo-derivatives as potential inhibitors for Cholesterol Ester Hydrolase
摘要:
Pancreatic Cholesterol Ester Hydrolase, a serine esterase, catalyzes the hydrolysis of cholesteryl esters in the gut. We report the convergent synthesis of alpha-difluoro-beta-trinuoroketo-(5,10,15) and of alpha-difluoroketo-derivatives (22,23) as inhibitors of this enzyme that were designed to generate stable tetrahedral reaction intermediates. Copyright (C) 1996 Elsevier Science Ltd
Synthesis and inhibitory activity of difluoroketone substrate analogs of N-myristoyltransferase.
摘要:
Two fluorinated nonhydrolyzable analogs of myristoyl-coenzyme A were synthesized and tested for inhibitory activity against N-myristoyltransferase (NMT). S-(2,2-Difluoro-3-oxohexadecyl)-coenzyme A (3) and S-(3,3-difluoro-2-oxopentadecyl)-coenzyme A (2) were prepared by alkylation of coenzyme A and were purified by reverse phase chromatography. Inhibition of NMT was observed with 3 and 2, with IC50's of 110 nM and 80 nM, respectively, in an in vitro assay developed in our laboratory. The known unfluorinated analog S-(2-oxopentadecyl)-coenzyme A (1) was found to have an IC50 of 7 nM. At 100 mu M in D2O, 3 was 59% hydrated and 2 was 88% hydrated.
complexes have been developed as efficient catalysts for the bisvinylogous Mukaiyama aldol reaction of silylketeneacetal with α-ketoesters and aldehydes, respectively. The catalytic systems were highly ε-selective, and the substrate scope was wide. The corresponding ε-hydroxy-α,β,γ,δ-unsaturated esters were obtained in up to 95% yield and 98% ee.
Synthesis and inhibitory activity of difluoroketone substrate analogs of N-myristoyltransferase.
作者:Karen M. Neder、Stephanie A. French、Stephen P.F. Miller
DOI:10.1016/s0040-4020(01)89601-0
日期:1994.1
Two fluorinated nonhydrolyzable analogs of myristoyl-coenzyme A were synthesized and tested for inhibitory activity against N-myristoyltransferase (NMT). S-(2,2-Difluoro-3-oxohexadecyl)-coenzyme A (3) and S-(3,3-difluoro-2-oxopentadecyl)-coenzyme A (2) were prepared by alkylation of coenzyme A and were purified by reverse phase chromatography. Inhibition of NMT was observed with 3 and 2, with IC50's of 110 nM and 80 nM, respectively, in an in vitro assay developed in our laboratory. The known unfluorinated analog S-(2-oxopentadecyl)-coenzyme A (1) was found to have an IC50 of 7 nM. At 100 mu M in D2O, 3 was 59% hydrated and 2 was 88% hydrated.
Synthesis of α-difluoro and α-difluoro-β-trifluoroketo-derivatives as potential inhibitors for Cholesterol Ester Hydrolase
作者:Béatrice David、Francis Schuber
DOI:10.1016/0960-894x(96)00290-9
日期:1996.7
Pancreatic Cholesterol Ester Hydrolase, a serine esterase, catalyzes the hydrolysis of cholesteryl esters in the gut. We report the convergent synthesis of alpha-difluoro-beta-trinuoroketo-(5,10,15) and of alpha-difluoroketo-derivatives (22,23) as inhibitors of this enzyme that were designed to generate stable tetrahedral reaction intermediates. Copyright (C) 1996 Elsevier Science Ltd