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Selenium-nitrogen heterocycles

Lalezari, I., Shafiee, A., Yalpani, M., Selenium-Nitrogen Heterocycles, 24, 109. [Pg.295]

The quaternary salts of selenium-nitrogen heterocycles are labile to nucleophiles and can be converted to other heterocyclic systems by ring expansion [82, 103], An example is conversion of 1,2,4-selenadiazolium trifluoromethane sulfonate (67) into 1,3,5-selenadiazine (68) (Scheme 17) [104], 2,3-Dimethyl-1-benzo-l, 3-selenazolium tetrafluoroborate is readily condensed with aromatic aldehydes to 2-styrylselenazole [105] or treated with sodium hydride to give 3-methyl-2-methylene-2,3 -dihydro-1 -benzo-1,3 -selenazole [106],... [Pg.303]

Lalezari I (1984) Five membered selenium-nitrogen heterocycles. In Katritzky AR, Rees CW (eds) Comprehensive heterocyclic chemistry I. Pergamon, Oxford, chap 4.20, p 334... [Pg.334]

See other pages where Selenium-nitrogen heterocycles is mentioned: [Pg.4]    [Pg.704]    [Pg.4]    [Pg.4]    [Pg.518]    [Pg.333]    [Pg.334]    [Pg.335]    [Pg.336]    [Pg.337]    [Pg.338]    [Pg.339]    [Pg.340]    [Pg.341]    [Pg.342]    [Pg.343]    [Pg.344]    [Pg.345]    [Pg.346]    [Pg.347]    [Pg.348]    [Pg.349]    [Pg.350]    [Pg.351]    [Pg.352]    [Pg.353]    [Pg.354]    [Pg.355]    [Pg.356]    [Pg.357]    [Pg.358]    [Pg.359]    [Pg.360]    [Pg.361]    [Pg.362]    [Pg.363]    [Pg.4]   
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See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

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See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]

See also in sourсe #XX -- [ Pg.24 , Pg.109 ]



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