An unusual domino reaction where the same furan α‐carbon atom reacts initially as a nucleophile and then as an electrophile is reported. In the presence of acid, N‐tosylfurfurylamines react with 2‐(tosylamino)benzyl alcohols to afford 2‐(2‐acylvinyl)indoles. The reaction proceeds by Friedel–Crafts alkylation at the C(2) atom of furan followed by acid‐catalyzed intramolecular nucleophilic attack of the ortho‐amino group onto the same carbon atom. The replacement of the tosylamino leaving group by phthalimide enables generation of a different type of indole yet allows the ambiphilic nature of C(2) to be retained. Both types of indoles were obtained when N‐furfurylbenzamides were employed.
A low-parametric model of crop biomass dynamics using the data of satellite remote sensing of terrestrial vegetation index and routine meteorological observations is developed. Modeling is performed with a data filtered by yield-correlation image masking technique. The simulation is based on the Monteith equation for carbon dynamics in terrestrial ecosystems. Meteorological parameters that have an effect on the photosynthesis intensity but rarely measured directly are calculated on the basis of analytical parameterizations obtained from reanalysis data. A validity of the model is demonstrated by the example of satellite monitoring of the spring wheat yield in the regions of the Republic of Belarus.
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