%0 Journal Article
%@ 0385-5414; 1881-0942
%A  Szakonyi Zsolt
%A  Fülöp Ferenc
%A  Bernáth Gábor
%A  Sohár Pál
%A Szervetlen Kémiai Tanszék ELTE / TTK / KI SzvtlK_Tsz [2006-],
%D 1996
%F publicatio:31816
%J HETEROCYCLES
%N 2
%P 625-634
%T tert-Butylcyclopentane Derivatives. Part 8. Synthesis of tert-Butylcyclopentane-fused Pyrimidin-4-ones
%U http://publicatio.bibl.u-szeged.hu/31816/
%V 42
%X In the reactions of ethyl (1 R*,2S*,4S*)-2-amino-4-tert-butyl-1-cyclopentanecarboxylate (4) or (1R*,3S*,5S*)-3-tert-butyl-6-azabicyclo[3.2.0]heptan-7-one (2) or (1R*,2S*,4S*)-2-amino-4-tert-butyl-1-cyclopentanecarboxamide (6) with imidates or triethyl orthobenzoate, tert-butylcyclopentane-fused dihydropy-rimidin-4-ones (7a-e) were prepared. The azetidinone (2) with lactim ethers furnished pyrrolo-, pyrido- and azepino[1,2-a]pyrimidin-4-ones (8-10) in ring-enlargement reactions. Ethyl (1R*,2S*,4S*)-2-amino-4-tert-butyl-1-cyclopentanecarboxylate (4) and ethyl (1R*,2S*,4S*)-2-benzylamino-4-tert-butyl-1 cyclopentanecarboxylate (5) and potassium cyanate or phenyl isocyanate or potassium thiocyanate or phenyl isothiocyanate, yielded pyrimidine-2,4-diones or 2-thioxopyrimidin-4-ones (11-22).
%Z Saját lista sorszáma: 344 (S.P.)