To our delight, we found that at even lower catalyst loadings A catalyzing the intermolecular dehydrogenation led to a shorter reaction time and a better yield of 1b.

Interestingly, A can catalyze the intermolecular dehydrogenation at a low ctalyst loading (具体量), leading to a quick reaction and a better yield of 1b.

We found that A, which catalyzes the
intermolecular dehydrogenation at even lower catalyst loadings,
resulted in shorter reaction time and higher yield of 1b than，