Methyl 3-alkylazulene-1-carboxylates were synthesized in high yields by the reaction of 3-methoxycarbonyl-2H-cyclohepta[b]furan-2-one with in situ generated morpholine enamines of aldehydes. Treatment of the esters with 100% phosphoric acid gave 1-alkylazulenes in excellent yields. Azulene was also synthesized in a good yield via methyl azulene-1-carboxylate with a modification of this method.
                                    甲基3-烷基莫I-1-
羧酸酯通过3-甲氧羰基-2H-环庚[b]
呋喃-2-酮与现场生成的吗啉烯胺醛反应以高产率合成。用100%
磷酸处理这些酯,可以以优异的产率得到1-烷基莫I。通过这种方法的改进,以及甲基莫I-1-
羧酸酯,莫I也在良好的产率下合成。