Progesterone (I) was oxidized to the 6-dehydro derivative (II) using 2,3-dichloro-5,6-dicyano-1,4-benzoquinone. Conjugate addition of 4-aminothiophenol (III) to dienone (II) furnished the aminophenyl sulfide (IV). The target urea was then obtained by coupling of the amino compound (IV) with (R)-alpha-methylbenzyl isocyanate (V).