Discussion Lithium tetrakis-(N-dihydropyridylj-aluminate (I), the responsible reducing agent generated from LAH and pyridine, is generated on a small scale by aging the orange- colored solution (ca. 0.25 M) for at least 24 hr. in a rubber-capped serum flask (initially at Oo, then at room temperature), from which aliquots can be removed by a hypodermic syringe. Crystalline I is obtained from more concentrated solutions (0.5 M) by filtration in a dry box ...
