| Abstract: | The d- and l-forms of 2H-octahydropyrido1,2-a]pyrazine (I) have been prepared and their absolute configurations established. These configurations were confirmed by an optical rotary dispersion study. The infrared spectra of 2H-octahydropyrido1,2-a]pyrazine (I), lH-octahydropyrido 1,2-a]pyrimidine (11) and 2H-octahydropyrido 1,2-c]pyrimidine (111) were compared with the infrared spectrum of quinolizidine. All of these spectra showed the Bohlmann bands characteristic of a trans ring structure. A few derivatives of these ring systems have been prepared. |
