Regioselectivity in nucleophilic ring-opening of aziridinones
作者:Erach R. Talaty、Mashitah M. Yusoff
DOI:10.1039/a800564h
日期:——
The proportions of products derived from competing modes of ring-opening of 1,3-di-tert-butylaziridinone and similar aziridinones by a variety of nitrogen, oxygen, sulfur and halogen nucleophiles do not agree with simple guidelines postulated in the literature for these types of aziridinones.
Reaction of 1,3-di-tert-butylaziridinone and other di-tert-alkylaziridinones with cyanamides produces an imidazolidinone (3 or 6) bearing the tert-alkyl substituents at positions 1 and 5 only, by selective cleavage of the acyl-nitrogen bond. Treatment of the product from the unsubstituted cyanamide (3) with HNO2 furnishes the corresponding hydantoin (5), whereas treatment with alkyl halides and base affords another imidazolidinone (7).
Ring-expansion of an aziridinone to a hexahydrotriazine through the agency of a novel rearrangement
作者:Mashitah M Yusoff、Erach R Talaty
DOI:10.1016/s0040-4039(96)02039-4
日期:1996.11
Reaction of 1,3-di-tert-butylaziridinone (1a) and similar aziridinones with thiosemicarbazide affords, as one of the products, a compound devoid of sulfur, viz., a substituted N-aminoimidazolidinone (3a) by selective cleavage of the acyl-nitrogen bond. Compound 3a undergoes a novel, acid-catalyzed rearrangement to a 3-imino-hexahydro-1,2,4-triazin-6-one (7a), which can also be obtained by treatment of 1a with hydrazine followed by BrCN, involving again selective cleavage of the acyl-nitrogen bond. Copyright (C) 1996 Elsevier Science Ltd
Talaty, Erach R.; Clague, Allen R.; Behrens, Jana M., Synthetic Communications, 1981, vol. 11, # 6, p. 455 - 462
作者:Talaty, Erach R.、Clague, Allen R.、Behrens, Jana M.、Agho, Michael O.、Burger, David H.、et al.