Design, synthesis and agricultural evaluation of derivatives of N-Acyl-N-(m-fluoro-benzyl)-6-amino-coumarin.

ABTRACTThis study aims to design and synthesize a series of N-Acyl-N-(m-fluoro- benzyl)-6- amino-coumarins through the principle of active substructure stitching, which are based on the core structure of N-(m-fluoro-benzyl)-6-amino-coumarin. The structures of target compounds have been characterized by H NMR, C NMR, ESI-MS and elemental analysis. Meanwhile, their agricultural activity have been evaluated in two weeds ( and ) and four widespread noxious pathogens ( and ).

1550-nm time-of-flight ranging system employing laser with multiple repetition rates for reducing the range ambiguity.

We demonstrated a time-of-flight (TOF) ranging system employing laser pulses at 1550 nm with multiple repetition rates to decrease the range ambiguity, which was usually found in high-repetition TOF systems. The time-correlated single-photon counting technique with an InGaAs/InP avalanche photodiode based single-photon detector, was applied to record different arrival time of the scattered return photons from the non-cooperative target at different repetition rates to determine the measured distance, providing an effective and convenient method to increase the absolute range capacity of the whole system. We attained hundreds of meters range with millimeter accuracy by using laser pulses of approximately 10-MHz repetition rates.

2-Acetyl-hydrazono-2-phenyl-aceto-hydrazide.

The title compound, C(10)H(12)N(4)O(2), was prepared as an inter-mediate for the synthesis of metamitron. The benzene ring plane forms dihedral angles of 66.0 (1) and 3.