A general and versatile synthetic approach to a broad series of aromatic triynes as precursors to helicene derivatives has been developed. Employing a set of simple tools, triynes comprising the (phenylethynyl)benzene, 1-(phenylethynyl)naphthalene, and 1-(1-naphthylethynyl)- naphthalene moiety have been prepared in good to excellent yields throughout the whole reaction sequence. The methodology allows constructing various types of a junction between the central diarylacetylene moiety and the attached acetylene units to get the target triynes of general formula R-C≡C-CH2-X-CH2-Ar-C≡C-Ar'-CH2-X-CH2-C≡C-R or R-C≡C-CH2CH2-Ar-C≡C-Ar'-CH2CH2-C≡C-R (R = H, CH3, TMS, or TIPS; X = O, NTs, or C(CO2CH3)2; Ar/Ar' = 2-phenylene or 2-naphthylene).
已经开发出一种通用且多功能的合成方法,用于制备芳香三炔作为螺环衍
生物的前体。利用一组简单的工具,在整个反应序列中成功制备了包含
苯基
乙炔基
苯、1-(
苯基
乙炔基)
萘和1-(1-
萘基
乙炔基)-
萘基的三炔,收率良好至优良。该方法允许在中心二芳基
乙炔基和附加的
乙炔单元之间构建各种类型的连接点,以获得通用公式 R-C≡C-CH
2-X-CH
2-Ar-C≡C-Ar'-CH
2-X-CH
2-C≡C-R 或 R-C≡C-CH
2CH
2-Ar-C≡C-Ar'-CH
2CH
2-C≡C-R(R = H、CH
3、
TMS 或
TIPS;X = O、
NTs 或 C(CO
2CH
3)
2;Ar/Ar' = 2-
苯基或2-
萘基)。