Visible-Light-Driven, Metal-Free Divergent Difunctionalization of Alkenes Using Alkyl Formates
作者:Ming Zheng、Jing Hou、Le-Wu Zhan、Yan Huang、Ling Chen、Li-Li Hua、Yan Li、Wan-Ying Tang、Bin-Dong Li
DOI:10.1021/acscatal.0c04332
日期:2021.1.15
difunctionalization of alkenes has received considerable attention as an efficient and straightforward way to increase molecular complexity. However, examples of the difunctionalization of alkenes initiated by the intermolecular addition of alkoxycarbonyl radicals providing substituted alkanoates are still rare. Herein, we present the visible light-driven metal-free divergent difunctionalization of alkenes triggered
Fe(<scp>ii</scp>)-Catalyzed alkenylation of benzylic C–H bonds with diazo compounds
作者:Jiang-Ling Shi、Qinyu Luo、Weizhi Yu、Bo Wang、Zhang-Jie Shi、Jianbo Wang
DOI:10.1039/c9cc01060b
日期:——
We report herein an alkenylation of benzylic C(sp3)–H bonds with diazocompounds via carbon cation intermediates with DDQ as the oxidant in the presence of a catalytic amount of Fe(II). Diphenylmethane, toluene, benzyl methyl sulfide and their derivatives could be applied as substrates to afford the tetra-substituted olefin products, which may serve as useful building blocks in organic synthesis.
Substituted hexahydro-1,4-diazepin-5-ones and compositions stabilized therewith
申请人:Wood Mervin G.
公开号:US20070256352A1
公开(公告)日:2007-11-08
The instant invention pertains to white, dyed, dipped, unscented and/or scented candle wax which is effectively stabilized against discoloration and fading by the incorporation therein of a substituted hexahydro-1,4-diazepin-5-ones in combination with a UV absorber and/or an antioxidant. Additionally, some novel substituted hexahydro-1,4-diazepin-5-one compounds are described.
White, dyed, dipped, unscented and/or scented candle wax is effectively stabilized against discoloration and fading by the incorporation therein of an oxazolidine in combination with a UV absorber and/or an antioxidant.
Candle wax compositions stabilized with UV absorbers and select hindered amine light stabilizers
申请人:BASF SE
公开号:US10385213B2
公开(公告)日:2019-08-20
A stabilized composition includes candle wax; an ultraviolet light absorber; and a hindered amine light stabilizer of formula (I). The compositions stabilize the candle with respect to yellowing, color fading in the case of dyed or pigmented candles, and other degradation of the waxes. The materials and compositions may be used in a wide variety of a candle waxes including, but not limited to, paraffin, beeswax, natural oils, polyamide plus fatty acids and esters thereof, fatty acids such as stearin, opacifiers, glycerides plus oxidized wax, alcohols, and ethylene oligomers.