Abstract: Disclosed is an invention for a transparent carry-on case that contains moveable privacy shields. This invention will be constructed with an outer sturdy and transparent material, such as polycarbonate (PC) or polymethyl methacrylate (PMMA), clear dividing and storage units, and opaque shields for privacy. The purpose of this invention is to allow ease of passage through any facilities with security measures by utilizing a carrying case whose contents can be easily visualized for inspection and that can also provide privacy for personal items at other times.

Abstract: Disclosed is a preferred process for preparation of heterocyclic diamine single-sided condensation products. The process involves gradually co-feeding stoichiometric amounts of a pyridyl compound and a heterocyclic diamine compound into an organic solvent in the presence of an alkali carbonate while heating at ≧60° C. This process can increase the reaction rate, improve yield, minimize double-sided condensation byproduct, and produce a high-quality product.

Abstract: Disclosed is a preferred process for preparation of diamine single-sided condensation products. The preferred process involves gradually co-feeding stoichiometric amounts of a heterocyclic compound and a diamine compound into an organic solvent in the presence of an alkali carbonate while heating at ≧60° C. This preferred process can increase the reaction rate, improve yield, minimize double-sided condensation byproduct, and produce a high-quality product.