Russian transformation products

This transformation has been extended to a number of other AT-substituted adducts of AT-sulfinyl dienophiles, - although yields of product are quite variable depending on the nature of the substituents. Russian workers have found that A/ -acyldihydrothiazine oxides can be converted to dihydro-1,3-oxazines in good yield (Scheme 1-X), perhaps via the ho-moallylic amine derivative [cf. Eq. (17)]. ... 

In the 1990s, researchers throughout the Russian Academy of Sciences reported syntheses and characterizations of a variety of compounds derived from a new transformation, electrophilic difluoramination, particularly of some compounds derived from difluoramination of various nitroalkyl reactants. Examples of such new products were first described by Pepekin and coworkers in terms of thermodynamic properties [74,75] and physical properties [76,77], which will be mentioned below. 

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