Accordingly cyclic triazole 2a was isolated in a good yield of 71%. The non-methyl derivative 2b was obtained in only 22%, again due to a better solubility of this derivative and the related difficulties during work-up. In contrast, the insoluble cyclic benzimidazole 2d was isolated in 62% yield. Pyrazole 2i could not be obtained due to cleavage of the TIPS-acetylene moiety.