Insect pheromones and their analogues. XLVI. Synthesis of 13RS-hydrooxytetradec-5Z-enoic acid ? The acyclic precursor of the macrolide component of the pheromone of Cryptolestes pusillus
The first demonstration of a 100% atom-efficient selective reduction of less reactive ketones over aldehydes using heterogeneous catalysts is reported. Extremely high selectivities for intra- and intermolecular reductions of ketones over aldehydes were achieved. This system was also applicable to a column reactor, leading to a gram-scale synthesis.
Efficient synthesis of (R)-harmonine – the toxic principle of the multicolored Asian lady beetle (Harmonia axyridis)
作者:Nadja C. Nagel、Anita Masic、Uta Schurigt、Wilhelm Boland
DOI:10.1039/c5ob00461f
日期:——
An efficient and flexible synthesis of (R)-harmonine and putative biosynthetic precursors has been developed. Furthermore, its antimicrobial activity againstLeishmania majoris demonstrated.
Nitroxyl-mediated electrooxidation of alcohols to aldehydes and ketones
作者:M. F. Semmelhack、Chuen S. Chou、David A. Cortes
DOI:10.1021/ja00351a070
日期:1983.6
SEMMELHACK, M. F.;SCHMID, CH. R.;CORTES, D. A.;CHOU, CH. S., J. AMER. CHEM. SOC., 1984, 106, N 11, 3374-3376
作者:SEMMELHACK, M. F.、SCHMID, CH. R.、CORTES, D. A.、CHOU, CH. S.
DOI:——
日期:——
A Concise, Efficient and Flexible Strategy for the Synthesis of the Pheromones of<i>Oryzaephilus</i>and<i>Cryptolestes</i>Grain Beetles
作者:Christopher D. J. Boden、John Chambers、Ian D. R. Stevens
DOI:10.1055/s-1993-25874
日期:——
Six of the seven macrolide components of the pheromone systems of grain beetles of the genera Oryzaephilus and Cryptolestes are synthesised by new routes of greatly improved efficiency. Iterative methodology based on the Wittig olefination is employed for the construction of the (Z,Z)-1,4-diene subunits in three of the lactones; chlorite oxidation of (Z)-3-alkenals derived by this methodology is used to form the (Z)-3-alkenoic acid functionalities present in four of the targets. The use of recently described conditions for the cyclisation of a Combretastatin analogue gives dramatically increased yields for the macrolactonisation steps in all six cases.