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  1. 1 Open Chemistry

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  1. 1 2004

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  1. 1 Potáček M.

  2. 1 Verner J.

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Aromatic glyoxalimines in criss-cross cycloaddition reactions

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Verner J., Potáček M.
Open Chemistry
|
2004
|
vol. 2
|
issue 1
220-233
EN
Aromatic 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.
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