Aminoacrylderivatives (1) and Br2/NH4SCN form iminothiazolinones 3 a-c and with chlorosulfonylisocyanate thiadiazinonedioxide 8. Reaction of 3 a with hydrazine yields disulfide 6. Compound 2 and PCl3 yield diazaphosphorines 7 a-c. By reaction of pyrimidinone 9 with NaOCl, HCl/H2O2 or Br2/NH4SCN dichloropyrimidinone 10, dichlorooxaziridine 16, and thiocyanate 13 are formed. Octahydroquinazolinone (17) and NaOCl or H2O2/HCl form chloroderivatives 18, 19 and 20, 18 with peracid oxaziridine 22. Compounds 16, 21, 22 and 13 with NaOCl form N-chloroderivatives 23, 24, 25 and 26 resp.
Aminoacrylderivatives (1) and Br2/NH4SCN form iminothiazolinones 3 a-c and with chlorosulfonylisocyanate thiadiazinonedioxide 8. Reaction of 3 a with hydrazine yields disulfide 6. Compound 2 and PCl3 yield diazaphosphorines 7 a-c. By reaction of pyrimidinone 9 with NaOCl, HCl/H2O2 or Br2/NH4SCN dichloropyrimidinone 10, dichlorooxaziridine 16, and thiocyanate 13 are formed. Octahydroquinazolinone (17) and NaOCl or H2O2/HCl form chloroderivatives 18, 19 and 20, 18 with peracid oxaziridine 22. Compounds 16, 21, 22 and 13 with NaOCl form N-chloroderivatives 23, 24, 25 and 26 resp.
Reactivity of Substituted 2-Spiropyrimidin-4-Ones Under Vilsmeier–Haack Conditions
作者:S. A. Varenichenko、O. K. Farat、V. I. Markov
DOI:10.1007/s10593-014-1626-9
日期:2015.2
Substituted 2-spiropyrimidin-4-ones are formylated at room temperature under the conditions of the Vilsmeier-Haack reaction. When cautiously heated they undergo electrophilic rearrangement.