S–S Bond cleavage of polymerization resistant 1,2-dithiolanes by acetylides: intrinsic reactivity of enzyme-bound lipoic acid toward stable, localized carbanions
作者:Masato Tazaki、Masayoshi Kumakura、Shizuo Nagahama、Makoto Takagi
DOI:10.1039/c39950001763
日期:——
The SâS bond of polymerization-resistant 1,2-dithiolanes 2 was cleaved cleanly by acetylides 4, giving the corresponding ring-opened products 5 in aprotic THF (quenched as silylsulfide 6) and their re-cyclized products 6,7-dihydro-1,4-dithiepins 3 in protic ButOH in excellent yields. The reactivity of 2 is discussed in relation to the reductive acylation of the enzyme-bound lipoic acid (Lip-E2).
抗聚合的1,2-二硫戊环2的S-S键被乙炔化物4干净地裂解,在非质子THF中得到相应的开环产物5(猝灭为甲硅烷基硫6)及其再环化产物6,7-在质子 ButOH 中以优异的产率生成二氢-1,4-二硫杂吡啶 3。 2 的反应性与酶结合的硫辛酸 (Lip-E2) 的还原酰化有关。