Amidinium salts reactions with alkenes

Treatment of the amidinium salt (96) with LDA was found to produce the alkene (97) and the stable carbene (98).98 The dimerization of the carbene was found to be very slow and so the initial formation of alkene (97) was explained by reaction of the carbene... 

Many vinylogous amidinium salts, e.g. (185) and (186) (Scheme 25), are readily available by double formylation of CHa-acidic or alkenic compounds. Reviews on the chemistry of vinylogous amidinium salts are available. The first azavinylogous foimamidinium salt (187 Scheme 26) was prepared in 1960 by reaction of DMF with cyanuric chloride. The mechanism of this reaction has been estab-lished. Based on these findings new methods for the synthesis of these compounds were developed, e.g. the reaction of isocyanatomethyleneiminium salts with tertiary formamides affords salts (187). In the synthesis of the salts (187) cyanuric chloride can be replaced by phosphorus nitride chloride (PNCl2)3. ... 

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See also in sourсe #XX -- [ , , , ]

See also in sourсe #XX -- [ , , , ]

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