作者:R. E. Atkinson、R. F. Curtis、D. M. Jones、J. A. Taylor
DOI:10.1039/j39690002173
日期:——
Ethynylbenzene (I), 1-ethynylnaphthalene (IX), 2-ethynylthiophen (IV), and 2-ethynyl-5-iodothiophen (XII) have been prepared from the corresponding iodo-derivatives (V), (VII), (II), and (X), by reaction with copper(I) 3,3-diethoxyprop-1-ynide to give αβ-acetylenic aldehydes, followed by base-catalysed deformylation. Alternatively, copper(I) 3-tetrahydropyranyloxy-prop-1-ynide gave the αβ-acetylenic alcohols (XVIII), (XIX), (XIII), (XX), and (XV), which were oxidised with nickel peroxide and then deformylated, or oxidised in aqueous alkali directly, to the same acetylenes (I), (IX), (IV), (XII), and 5-ethynyl-2,2′-bithienyl (XVII). The application of this sequence to the protection of terminal ethynyl groups is indicated.
已通过从相应的碘代衍生物(V)、(VII)、(II)和(X)与铜(I)3,3-二乙氧基丙-1-炔酸酯反应制备了乙炔苯(I)、1-乙炔基萘(IX)、2-乙炔基噻吩(IV)和2-乙炔基-5-碘噻吩(XII),生成αβ-炔醛,然后通过碱催化去甲酰化反应得到目标产物。或者,使用铜(I)3-四氢吡喃氧基-丙-1-炔酸酯可以得到αβ-炔醇(XVIII)、(XIX)、(XIII)、(XX)和(XV),这些醇经过镍过氧化物氧化后进行去甲酰化,或在碱性水溶液中直接氧化,最终得到相同的炔类化合物(I)、(IX)、(IV)、(XII)以及5-乙炔基-2,2′-双噻吩(XVII)。这一系列反应对于端炔基的保护具有应用价值。