Photocyclization Reactions of N-Substituted 3-(2-Hydroxynaphthalen-1-yl)propenamide Derivatives Accompanied by Liberation of Aliphatic and Aromatic Primary Amines
same time, uncaging releases a strongly fluorescent coproduct that can be used as a reporter for quantitative substrate delivery. The quantum yield of double bond photoisomerization leading to uncaging after one-photon absorption mostly lies in the 10% range. Taking advantage of the favorable photophysical properties of the uncaging coproduct, we use a series of techniques based on fluorescence emission
Einfache Synthese von 3-Methyl-5,6-dihydro-2H-pyran-2-onen und 3-Methylcumarinen unter milden Bedingungen
作者:Gioacchino Falsone、Bernd Spur、H. Peter Wingen
DOI:10.1002/ardp.19833160907
日期:——
Es wird die Synthese der 3‐Methyl‐5,6‐dihydro‐2H‐pyran‐2‐one 3,5 und der 3‐Methylcumarine 7a—e aus den β‐Hydroxy‐oxo‐Verbindungen 1, 4, 6a—c und der Phosphonopropionsäure 2 unter Wittig‐Horner Bedingungen beschrieben.
Rh(III)-Catalyzed C–H Activation/Cyclization of Benzamides and Diazonaphthalen-2(1<i>H</i>)-ones for Synthesis of Lactones
作者:Renjie Chen、Sunliang Cui
DOI:10.1021/acs.orglett.7b01728
日期:2017.8.4
A Rh(III)-catalyzed C–Hactivation/cyclization of benzamides and diazonaphthalen-2(1H)-ones for synthesis of lactones has been developed. In the presence of Rh(III) catalysis, the benzamides would form rhodacycle species and could be trapped by diazonaphthalen-2(1H)-ones for arylation, and the following intramolecular lactonization would rapidly furnish the products. Thus, the diazonaphthalen-2(1H)-ones
The present invention relates to 3-ketocoumarines which can be used as photoinitiators in LED photocuring and to a process for curing compositions comprising said 3-ketocoumarines.