The invention discloses a method for resolving a barnidipine mother
nucleus by using
glucosamine as a resolving agent. The method comprises the following process routes shown in the description: resolving the barnidipine mother
nucleus by using the
glucosamine as the resolving agent, wherein the easily available low-cost barnidipine is used as a chiral resolving agent for resolving the racemized barnidipine mother
nucleus and solvents used in the middle are easily available and low-cost
alcohol and water; and obtaining a
single isomer of the barnidipine mother nucleus with high yield and high optical purity (ee value is 99.0-99.6%) with. The method has the beneficial effects that the resolving agent is low-cost and easily available, the using of expensive resolving agents is avoided, the used solvents are harmfulless, the
resolution recovery rate is high, and the product has high optical purity and strong
atom economy; the experiment operation is simple,
reaction conditions are mild and easy to control, and the technology
repeatability is high; and the implementation of the industrial production is easy.