The N-(4-substituted phenyl)-N'-cyclohexylideneacetylthioureas IIa - IIf were readily prepared by the reaction of cyclohexylideneacetyl isothiocyanate I with 4-substituted anilines. They were cyclized to the 2-(4-substituted phenylimino)-4-oxo-1,3-thiazaspiro[5.5]undecanes IIIa - IIIe in the presence of boron trifluoride etherate and to the 1-(4-substituted phenyl)-4-oxo-2-thioxo-1,3-diazaspiro[5.5]undecanes IVa, IVc - IVf in alkaline medium.
N-(4-取代苯基)-N'-环己基亚乙酰硫脲IIa至IIf是通过环己基亚乙酰异硫氰酸酯I与4-取代苯胺反应制备的。它们在三氟化硼醚酸酯存在下环化为2-(4-取代苯亚胺基)-4-氧代-1,3-噻唑螺[5.5]十一烷IIIa至IIIe,在碱性介质中环化为1-(4-取代苯基)-4-氧代-2-硫代-1,3-二氮杂螺[5.5]十一烷IVa、IVc至IVf。