- Benzopyrans compound as well as preparation method and application thereof
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The invention relates to the field of the agricultural fungicide, and specifically relates to a benzopyrans compound as well as a preparation method and application thereof. The benzopyrans compound provided by the invention is simple in structure, easy to synthesize, low in production cost, and has a good inhibiting effect on the strawberry botrytis cinerea, potato altemaria solani, and watermelon fusarium oxysporum.
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- Iridium-Catalyzed Asymmetric Hydrogenation of 2H-Chromenes: A Highly Enantioselective Approach to Isoflavan Derivatives
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A highly efficient (aS)-Ir/In-BiphPHOX-catalyzed asymmetric hydrogenation of substituted 2H-chromenes and substituted benzo[e][1,2]oxathiine 2,2-dioxides is described. A series of 2H-chromenes and benzo[e][1,2]oxathiine 2,2-dioxides were hydrogenated to give the target products in high yields (92-99%) with excellent enantioselectivities (up to 99.7% ee) using our catalytic system. This reaction provides a direct and efficient method for the construction of chiral benzo six-membered oxygen-containing compounds.
- Xia, Jingzhao,Nie, Yu,Yang, Guoqiang,Liu, Yangang,Zhang, Wanbin
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supporting information
p. 4884 - 4887
(2017/09/23)
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- SYNTHESIS AND ANTI-RHINOVIRUS ACTIVITY OF HALOGEN-SUBSTITUTED ISOFLAVENES AND ISOFLAVANS
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Halogenated 3(2H)-isoflavenes and (+/-)isoflavans were synthesized in order to study their in vitro activity against rhinovirus 1B by comparison with the known anti-viral compound, 4',6-dichloroflavan.The Wittig intramolecular cyclization of halogen subst
- Burali, Carla,Desideri, Nicoletta,Stein, M. Luisa,Conti, Cinzia,Orsi, Nicola
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p. 119 - 124
(2007/10/02)
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