Synthesis of New Imidazolidine and Tetrahydropyrimidine Derivatives

Table 1

Comparing yields of compounds 3a,  b and 4a–c obtained under two reaction conditions A and B.

Entry	Products	Diaminoalkane	Time (h)^a	Yield (%)
				A	B
1	3a	Ethylenediamine	16	75	47
2	3b	1,3-Diaminopropane	16	60	46
3	4a	2,2-Dimethyl-l,3-propanediamine	20	77	50
4	4b	1,2-Diaminopropane	18	56	44
5	4c	1,2-Diaminocyclohexan	22	54	42

aOnly for reaction conditions-A.