The reaction of N1-amidino-N3-phenylthiourea (I) with 2-bromo-1-cyclopropylethanone (II) in ethanol/acetone gives the N1-amidino-S-(2-cyclopropyl-2-oxoethyl)-N3-phenylisothiourea (III), which without isolation is cyclized to the target aminothiazole by means of TEA.
The reaction of aniline (I) with di(2-pyridyl)thione (DPT) gives the corresponding isothiocyanate (II), which is condensed with cyanamide (III) and 2-bromo-1-cyclopropylethanone (IV) (obtained by bromination of acetylcyclopropane (V)) by means of NaOMe to yield the adduct (VI). This compound, without isolation, cyclizes to the target thiazole.
The reaction of N1-amidino-N3-propylthiourea (I) with 2-bromo-1-(3-pyridyl)ethanone (II) in ethanol/acetone gives the N1-amidino-S-[2-oxo-2-(3-pyridyl)ethyl]-N3-propylisothiourea (III), which without isolation is cyclized to the target aminothiazole by means of TEA.
The reaction of N1-amidino-N3-phenylthiourea (I) with 2-bromo-1-(3-pyridyl)ethanone (II) in ethanol/acetone gives the N1-amidino-S-[2-oxo-2-(3-pyridyl)ethyl]-N3-phenylisothiourea (III), which without isolation is cyclized to the target aminothiazole by means of TEA.
The reaction of N1-amidino-N3-phenylthiourea (I) with 3-(benzyloxy)phenacyl bromide (II) in ethanol/acetone gives the N1-amidino-S-[2-(3-benzyloxyphenyl)-2-oxoethyl]-N3-phenylisothiourea (III), which without isolation is cyclized to the target aminothiazole by means of TEA.
The reaction of aniline (I) with di(2-pyridyl)thione (DPT) gives the corresponding isothiocyanate (II), which is condensed with cyanamide (III) and 2-bromo-1-(3-benzyloxyphenyl)ethanone (IV) by means of NaOMe to yield the adduct (V). This compound, without isolation, cyclizes to the target thiazole.
The reaction of N1-amidino-N3-(4-chlorophenyl)thiourea (I) with 3-(benzyloxy)phenacyl bromide (II) in ethanol/acetone gives the N1-amidino-S-[2-(3-benzyloxyphenyl)-2-oxoethyl]-N3-(4-chlorophenyl)isothiourea (III), which without isolation is cyclized to the target aminothiazole by means of TEA.
The reaction of propylamine (I) with di(2-pyridyl)thione (DPT) gives the corresponding isothiocyanate (II), which is condensed with cyanamide (III) and 2-bromo-1-(3-pyridyl)ethanone (IV) by means of NaOMe to yield the adduct (V). This compound, without isolation, cyclizes to the target thiazole.
The reaction of aniline (I) with di(2-pyridyl)thione (DPT) gives the corresponding isothiocyanate (II), which is condensed with cyanamide (III) and 2-bromo-1-(3-pyridyl)ethanone (IV) by means of NaOMe to yield the adduct (V). This compound, without isolation, cyclizes to the target thiazole.
The reaction of 4-chloroaniline (I) with di(2-pyridyl)thione (DPT) gives the corresponding isothiocyanate (II), which is condensed with cyanamide (III) and 2-bromo-1-(3-benzyloxyphenyl)ethanone (IV) by means of NaOMe to yield the adduct (V). This compound, without isolation, cyclizes to the target thiazole.