Abstract: N-Alkylation of alkynyl imines 5, 6, and 8 with methyl triflate or triethyloxonium tetrafluoroborate provides the openchain propyne iminium salts 9 and 10, the related salts 11aœe and 12b where the iminium function is a part of a heteroaromatic ring, and p- phenylene-bis (propyne iminium) salts 13a, c. The method gives access to novel propyne iminium salts in which the C, C triple bond bears an alkyl, SiMe3, or H substituent. Key ...
![2-Iodobenzo[d]thiazole Structure](https://image.chemsrc.com/caspic/276/1123-99-5.png)