Disclosed is a vinamidinium salt represented by the formula (I):
[wherein R1 represents a hydrogen atom, a halogen atom, an optionally substituted hydrocarbon group or the like; R2 and R3 are the same or different and each represents a lower alkyl group, or alternatively R2 and R3 may combine together to form a ring; R4 and R5 are the same or different and each represents a lower alkyl group, or alternatively R4 and R5 may combine together to form a ring; X and Y are the same or different and each represents a bromine atom or a chlorine atom; n represents a number of not less than 2; and m represents 0 or n], and methods for synthesizing a heterocyclic ring compound using the salt.
本发明公开了一种由式(I)表示的维那米啶盐:[其中,R1表示氢原子、卤素原子、可选取代的碳氢基团或类似物;R2和R3相同或不同,分别表示较低的烷基基团,或者R2和R3可以结合形成一个环;R4和R5相同或不同,分别表示较低的烷基基团,或者R4和R5可以结合形成一个环;X和Y相同或不同,分别表示
溴原子或
氯原子;n表示不少于2的数字;m表示0或n],以及使用该盐合成杂环环化合物的方法。