Formolysis and acetolysis of linear saturated and allylic secondary cyclopropyl carbinols
摘要:
Simple esterification of a series of secondary aliphatic cyclopropyl carbinols under the influence of concentrated HCO2H or AcOH without modification of the carbon skeleton is disclosed. Under the same conditions related allyl alcohols undergo stereospecific isomerization to the corresponding esters of 3E,5E-dienols.
Simple synthesis of acetogenin transoid insect pheromones starting from acetylcyclopropane
摘要:
A highly effective synthesis of a series of alkyl and 1-alkenyl cyclopropyl ketones, which are key components in the complete synthesis of a large number of transoid lepidoptera pheromones, has been developed, based on the alkylation of N-cyclohexyl-1-cyclopropylethylideneimine or its condensation with aldehydes.
Synthesis of compounds with juvenile hormone activity—XII
作者:K. Mori
DOI:10.1016/s0040-4020(01)93821-9
日期:——
A stereoselective synthesis of the title compound (II) as well as that of its lowerhomolog, 6-ethyl-10-methylundeca-5-trans, 9-dien-2-one (III), was accomplished. Both were converted to methyl dl-12,14-dihomojuvenate (dl-C18-Cecropia juvenile hormone, I) and methyl dl-14-homojuvenate (IV), respectively. Analogs of the Cecropia juvenile hormones with an ethynyl substituent (XVIII and XIX) were also