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Laser desorption ionization (LDI) time-of-flight (TOF) mass spectroscopy of solid p-dimethylaminophenylpentazole (1) gives strong peaks of m/z -42 and -70. The -70 peak was identified by 15 N labeling of 1 to be the pentazolate anion (cyclo-N 5- ). The pentazolate anion is formed by an electron attachment to 1 forming the corresponding radical anion followed by a decomposition...
1,2-Bis(1H-indol-2-yl)ethane (9) has been prepared and converted into indolo[2,3-c]carbazole (8) using palladium acetate in refluxing acetic acid. Reaction of 9 with CoF 3 in hot TFA led to isolation of cyclohept[1,2-b:5,4-b′]bisindole derivatives 11 and 12, which could be elaborated into further derivatives. Treatment of 9 with orthoesters, aldehydes and ketones under acidic conditions afforded...
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