作者:Xue-Li Geng、Sascha Ott
DOI:10.1002/chem.201101358
日期:2011.10.17
longer reaction times. The differentiation between the two acetylene termini of 1 allows for the controlled synthesis of the title compounds by a variety of different Cu‐ and Pd‐catalyzed oxidative acetylene homo‐ and heterocoupling protocols. Crystallographic characterization of A2PA 1 and dimeric Mes*PC(C≡CR1)C4(R2C≡C)CPMes* (3 b, R1=R2=Ph; 6, R1=R2=TMS), and 10 (R1=R2=C≡CPh) verifies that the
Bis-TMS保护的C,C-二乙炔磷烯烃(A 2 PA)1(Mes *PC(C≡CTMS)2 ; Mes * = 2,4,6- t Bu 3 Ph)已用作构建模块用于丁二炔扩展的树枝状烯片段的构建,其中磷烯烃具有异位双键的特征。用CuCl处理1产生Cu I乙炔化物,其在乙炔反式Mes *基团上选择性地形成。的顺式中相似的化学-TMS-乙炔接合,尽管在较高温度和更长的反应时间。1的两个乙炔末端之间的区别可以通过多种不同的Cu和Pd催化的氧化乙炔均相和杂偶合方案控制标题化合物的合成。A的晶体学表征2 PA 1和二聚体的Mes *PC(C≡CR 1)C 4(R 2 C≡C)CPMes*(图3b,R 1 = R 2 = Ph值; 6,R 1 = R 2 = TMS)和10(R 1 = R 2 =C≡CPh)验证了偶联反应过程中整个PC键的立体化学是保守的,而光谱证据表明顺式/碘取代的A 2