作者:Naijue Zhu、Danielle Lightsey、Maryam Foroozesh、William Alworth、Amit Chaudhary、Kristine L. Willett、Cheryl L. Klein Stevens
DOI:10.1007/s10870-005-9061-5
日期:2006.5
Cytochrome P450 enzymes protect the body from foreign substances through a mechanism that involves oxidation of those substances into more readily excretable polar compounds. It has been shown that some naphthoflavones function as substrates of certain P450 enzymes (CYP1A1 and CYP1B1) and with appropriate structural changes may become inhibitors. Moreover, propargyl ether derivatives of adamantane have been shown to function as selective inactivators of some P450 enzymes (CYP2B1 and CYP2B5). In an attempt to improve the potency and selectivity of inhibition, we have designed and synthesized a series of naphthoflavone propargyl ethers. We report here the synthesis, X-ray crystal structures, and inhibition data (IC50 of EROD inhibition in CYP1A1 and CYP1B1 enzymes) of α-naphthoflavone 2′-propargyl ether, β-naphthoflavone 2′-propargyl ether, α-naphthoflavone 4′-propargyl ether, and β-naphthoflavone 4′-propargyl ether. Crystallographic data: α-naphthoflavone 2′-propargyl ether, $$P\bar 1$$ , a=7.775(1) Å, b=8.062(1) Å, c=13.110(1) Å, α=84.32(1)°, β=75.42(1)°, γ=86.56(1)°, V=790.8(2) Å3; β-naphthoflavone 2′-propargyl ether, $$P\bar 1$$ , a=7.605(2) Å, b=7.793(1) Å, c=14.167(2) Å, α=77.06(1)°, β=75.41(1)°, γ=89.54(1)°, V=790.9(2) Å3; α-naphthoflavone 4′-propargyl ether, P21/n, a=14.595(2) Å, b=4.708(1) Å, c=24.745(6) Å, β=106.31(2)°, V=1631.8(7) Å3; β-naphthoflavone 4′-propargyl ether, P1, a=4.8871(5) Å, b= 7.9597(7) Å, c=21.788(3) Å, α=81.771(9)°, β=89.918(10)°, γ=72.223(8)°, V= 797.9(2) Å3.
细胞色素P450酶通过将外来物质氧化成更易于排泄的极性化合物,从而保护身体免受这些物质的伤害。已有研究表明,某些萘黄酮可以作为特定P450酶(CYP1A1和CYP1B1)的底物,并且在适当结构改变后可能成为抑制剂。此外,金刚烷的炔丙基醚衍生物已被证明可以作为某些P450酶(CYP2B1和CYP2B5)的选择性灭活剂。为了提高抑制作用的效力和选择性,我们设计和合成了一系列萘黄酮炔丙基醚。在此,我们报告了α-萘黄酮2′-炔丙基醚、β-萘黄酮2′-炔丙基醚、α-萘黄酮4′-炔丙基醚和β-萘黄酮4′-炔丙基醚的合成、X射线晶体结构和抑制数据(CYP1A1和CYP1B1酶中EROD抑制的IC50值)。结晶学数据:α-萘黄酮2′-炔丙基醚,$$P\bar 1$$,a=7.775(1) Å,b=8.062(1) Å,c=13.110(1) Å,α=84.32(1)°,β=75.42(1)°,γ=86.56(1)°,V=790.8(2) Å3;β-萘黄酮2′-炔丙基醚,$$P\bar 1$$,a=7.605(2) Å,b=7.793(1) Å,c=14.167(2) Å,α=77.06(1)°,β=75.41(1)°,γ=89.54(1)°,V=790.9(2) Å3;α-萘黄酮4′-炔丙基醚,P21/n,a=14.595(2) Å,b=4.708(1) Å,c=24.745(6) Å,β=106.31(2)°,V=1631.8(7) Å3;β-萘黄酮4′-炔丙基醚,P1,a=4.8871(5) Å,b=7.9597(7) Å,c=21.788(3) Å,α=81.771(9)°,β=89.918(10)°,γ=72.223(8)°,V=797.9(2) Å3。