作者:Alan F. Thomas、Marina Schouwey、Jean-Claude Egger
DOI:10.1002/hlca.19810640524
日期:1981.7.22
5-Isopropyl-2-propyl-2-cyclohexen-1-one (1) and 5-isopropyl-2-(2-methylpropyl)-2-cyclohexen-1-one (2), homologues of the p-methene ketone carvotanacetone, have been identified in the oil of Anthemis nobilis. Their synthesis involved allylation of a cyclohexane-1,3-dione, and the acid-catalyzed cyclization to dihydrofurans of the 2-allylcyclohexane-1,3-diones is described. The stereochemistry of metal
5-异丙基-2-丙基-2-环己烯-1-酮(1)和5-异丙基-2-(2-甲基丙基)-2-环己烯-1-酮(2),是对-亚甲基酮甲丙酮丙酮的同系物,已被鉴定出在Anthemis nobilis的油中。他们的合成涉及环己烷-1,3-二酮的烯丙基化,以及酸催化的2-烯丙基环己烷-1,3-二酮的环化成二氢呋喃的过程。在天然产物的合成过程中提及了3-乙氧基-5-异丙基-2-丙基-2-环己烯-1-酮(18)的金属氢化物还原的立体化学。讨论了一些生物遗传因素。