Synthetic analogs of tetrahydrobiopterin with cofactor activity for aromatic amino acid hydroxylases
作者:E. C. Bigham、G. K. Smith、J. F. Reinhard、W. R. Mallory、C. A. Nichol、R. W. Morrison
DOI:10.1021/jm00384a007
日期:1987.1
Tetrahydrobiopterin (THB) analogues with 6-alkoxymethyl substituents, 3a-j, where the substituents were straight- and branched-chain alkyl ranging from methyl to octyl, have been synthesized by the Taylor method from pyrazine ortho amino nitriles by guanidine cyclization, hydrolysis in aqueous NaOH, and catalytic hydrogenation over Pt in trifluoroacetic acid (TFA). The best of these compounds, 3b,
用Taylor法由吡嗪邻氨基腈经胍环合,水解,四氢呋喃蝶呤(THB)类似物3a-j与6-烷氧基甲基取代基合成,取代基为甲基至辛基的直链和支链烷基。 NaOH水溶液中,在三氟乙酸(TFA)中在Pt上催化氢化。这些化合物中最好的3b是苯丙氨酸羟化酶,酪氨酸羟化酶(V = THB的154%)和色氨酸羟化酶的优良辅助因子,不会破坏底物的结合(Kmtyr = 23 microM),并且可以通过二氢蝶呤回收还原酶(V = THB的419%)。该化合物正在被评估为生物蝶呤缺乏症疾病中的辅因子替代品。