“…Dispiroheterocycles are present in a variety of natural products, pharmaceuticals, and other biologically active molecules, − and the development of efficient methods for their construction is therefore of interest to researchers in the fields of organic synthesis and medicinal chemistry. − Spiroacetals are of particular interest because they are found in numerous biologically active natural products isolated from plants, fungi, and marine organisms. − In addition, the spiroacetal moiety contributes to the bioactivities of insect sex pheromones, polyketide antibiotics, and microtubule stabilizing agents, and it represents a privileged scaffold in drug discovery research. − Accordingly, the synthesis of structurally novel dispiroacetals and developing efficient methods for them are highly desirable.…”