Aromatic glyoxalimines in criss-cross cycloaddition reactions
AbstractAromatic 1,4-diazabuta-1,3-dienes in glacial acetic acid with thiocyanates produce via criss-cross cycloaddition reactions the corresponding perhydroimidazo[4,5-d]imidazole-2,5-dithiones. When a mixture of thiocyanate and cyanate in a proper ratio was reacted together, nonsymmetrical 5-thioxo-perhydroimidazo[4,5-d]imidazole-2-ones were isolated. With cyanates substituted aromatic 1,4-diazabuta-1,3-dienes afforded product of acetic acid addition to primary formed 1,3-dipole intermediate 5-(4-substituted phenylamino)-3-(4-substituted phenyl)-2-oxoimidazolidin-4-yl acetate.
1934 ◽
Keyword(s):
1979 ◽
Vol 44
(8)
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pp. 2330-2337
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Keyword(s):
1972 ◽
Vol 94
(4)
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pp. 1247-1249
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2014 ◽
Vol 131
(22)
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pp. n/a-n/a
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