Conjugated dienes are desirable reagents for several important applications. We report that sterically uncrowded PCP-pincer iridium complexes, including precursors of (^iPr4PCP)Ir and (^Me2tBu2PCP)Ir, catalyze the transfer dehydrogenation of pentane, using high concentrations of t‐butylethylene (TBE) as hydrogen acceptor, to give high yields of 1,3-pentadiene (piperylene). Piperylene yields are ca. 100-fold greater than those obtained with the more widely used di(t‐butyl)phosphino substituted pincer iridium catalysts. This represents, to our knowledge, the first reported high-yield synthesis of dienes via the dehydrogenation of n-alkane using molecular catalysts. To our knowledge, this is the first reported high-yield synthesis of dienes achieved via the dehydrogenation of n-alkane using molecular catalysts.

共轭二烯是用于几种重要应用的理想试剂。我们报告说，使用（^{i Pr4} PCP）Ir和（^{Me2 t Bu2} PCP）Ir的前体在空间上不拥挤的PCP钳状铱配合物，使用高浓度的叔丁基乙烯（TBE）作为氢受体，催化戊烷的转移脱氢，得到高产率的1,3-戊二烯（亚戊二烯）。戊间二烯的产率约为。比使用更广泛使用的二（叔丁基）膦基取代的钳制铱催化剂获得的化合物高100倍。据我们所知，这是第一个报道的通过n脱氢合成二烯的高产率合成方法。-使用分子催化剂的烷烃。据我们所知，这是首次报道的使用分子催化剂通过正构烷烃脱氢实现的二烯高产率合成。