Ray Stantz Ray Stantz Raymond "Ray" Stantz, PhD is a fictional character from the "Ghostbusters" franchise. He appears in the films "Ghostbusters" (1984), "Ghostbusters II" (1989), "Casper" (1995, as a cameo), the animated television series "The Real Ghostbusters" and "Extreme Ghostbusters", and the video games Beeline's "Ghostbusters" and "". He was portrayed by Dan Aykroyd in both live action films, and voiced by Frank Welker in the animated series. He is a member of the Ghostbusters and one of the three doctors of parapsychology, along with Dr. Peter Venkman and Dr. Egon Spengler. Dan Aykroyd has a cameo appearance in "Ghostbusters" (2016)
Pictet–Spengler reaction imine generated from the condensation of the aldehyde and amine. This helps to explain the need for an acidic medium in some substrates, as the imine may not be electrophilic enough for ring closure to occur but the Iminium ion is capable of undergoing the reaction. The Pictet-Spengler reaction is widespread in both human industry and biosynthesis. It has remained an important reaction in the fields of alkaloid and pharmaceutical synthesis since its inception, where it has been employed in the development of many beta-carbolines. The enzyme strictosidine synthase is an example of nature utilizing the Pictet-Spengler reaction, which generates