laboratory conditions (20 °C, daylight and in air): NO24 and BTh4 are stable for at least six months without observable decomposition, whereas NHMe4, NMe24, DMeNH24 and IN4 decompose within a few hours or days. The derivative DMeNH24, with ortho‐methyl groups partially shielding the tetrayne backbone, is considerably more stable than the parent compound with Ar=4‐NH2C6H4 (NH24). The ability of the stable tetraynes
描述了六种二芳基四炔衍
生物[Ar‐(CC)4 ‐Ar]的合成和表征,其中Ar = 4‐NO 2 ‐ C 6 H 4‐(NO 2 4),4‐NH(Me)C 6 H 4-(NHMe 4),4-NMe 2 C 6 H 4-(NMe 2 4),4-NH 2-(2,6-二甲基)C 6 H 4-(
DMeNH 2 4),5-
吲哚基(IN4)和5-
苯并噻吩基(BTh4)。报告了X射线分子结构NO 2 4,NHMe4,
DMeNH 2 4,IN4和BTh4。已在实验室环境条件下(20°C,日光和空气中)评估了四炔的稳定性:NO 2 4和BTh4至少在六个月内稳定,没有可观察到的分解,而NHMe4,NMe 2 4,
DMeNH 2 4和IN4会在数小时或数天内分解。具有邻位的导数
DMeNH 2 4与Ar = 4-NH 2 C 6 H 4(NH 2 4)的母体化合物相比,部分保护四炔主链的甲基基团要稳定得多。据报