2,3-dimethylthioanthraquinono<2,1-d>thiazolium chloride   、                                                                                      alkaline earth salt of/the/ methylsulfuric acid                                                                                                                                                              在
                                                                                                                                                                                 
乙酸酐                                                                                                                                  作用下,
                                                                                                                                                                                        反应 0.75h,
                                                                                                                以35%的产率得到3-methyl-2-<7-(3-methylanthraquinono<2,1-d>thiazol-2(3H)-ylidene)-1,3,5-heptatrienyl>anthraquinono<2,1-d>-thiazolium chloride