Syntheses of 7-fluoro- and 6,7-difluoroserotonin and 7-fluoro- and 6,7-difluoromelatonin
作者:Jorge Heredia-Moya、Yoshio Hayakawa、Kenneth L. Kirk
DOI:10.1016/j.jfluchem.2006.06.015
日期:2006.9
The Abramovitch adaption of the Fischer indole synthesis gave low yields of 7-fluoro-5-methoxytryptamine due in part to decomposition during the required decarboxylation step. Therefore, 7-fluoro- and 6,7-difluoro-5-methoxytryptamines were prepared by reaction of aminobutyraldehyde (generated in situ from the diethyl acetal) with 2-fluoro- and 2,3-difluoro-4-methoxyphenylhydrazine, and the products
Fischer吲哚合成的Abramovitch适应性降低了7-氟-5-甲氧基色胺的收率,这部分归因于所需脱羧步骤中的分解。因此,通过氨基丁醛(由二乙缩醛原位生成)与2-氟和2,3-二氟-4-甲氧基苯基肼反应,制得7-氟和6,7-二氟-5-甲氧基色胺。转换为相应的5-羟色胺。褪黑素是通过一锅反应制备的,该反应涉及氨基丁醛的原位乙酰化。