A novel enantioselective organocatalytic strategy is presented for the synthesis of tetrahydrofurobenzofuran and methanobenzodioxepine naturalproductcorestructures. The strategy is based on a pair of divergent reaction pathways in which hydroxyarenes react with γ‐keto‐α,β‐unsaturated aldehydes, catalyzed by a chiral secondary amine. One reaction pathway, which leads to chiral 5,5‐fused acetals with
Asymmetric Synthesis of Aliphatic α-Amino and γ-Hydroxy α-Amino Acids and Introduction of a Template for Crystallization-Induced Asymmetric Transformation
The asymmetric synthesis of aliphatic α-amino and γ-hy]droxy α-amino acids is described. The key step is an aza-Michael addition controlled by crystallization-induced asymmetrictransformation (CIAT), affording excellent diastereomeric ratios (dr ≥96:4). Consecutive deoxygenation or stereoselective reduction (dr 99:1) furnish various α-amino and γ-hydroxy α-amino acids, respectively.
A device, system, and method of controlling pests are disclosed. A pest control device includes a sensor having a sensor cell and a controller. A surface of the sensor cell is coated with an agent that reacts with a targeted biochemical analyte secreted by pests. The controller is coupled to the sensor and is configured to receive sensor data from the sensor cell indicative of a rate of change in sensor mass detected on the surface of the sensor cell, determine whether the rate of change in the sensor mass based on the received sensor data exceeds a predefined threshold rate, and transmit a pest detection alert notification to a server in response to a determination that the rate of change exceeds the predetermined threshold rate.
[EN] CARBONYL CONTAINING COMPOUNDS FOR CONTROLLING AND REPELLING CIMICIDAE POPULATIONS<br/>[FR] COMPOSÉS CONTENANT UN CARBONYLE POUR MAÎTRISER ET REPOUSSER DES POPULATIONS DE CIMICIDAE
申请人:SEMIOSBIO TECHNOLOGIES INC
公开号:WO2012129702A1
公开(公告)日:2012-10-04
Compositions and methods for controlling and/or repelling bedbugs are provided. The compositions comprise one or more compounds having bedbug repellant activity. Such compounds may be, for example, naturally occurring semiochemicals or structural or functional analogs of naturally occurring semiochemicals. Exemplary compounds are compounds of general formula (I).