An Ultrasound Mediated Green Synthesis of Benzimidazolylthiounsaturatednitriles Using Water as a Green Solvent

Table 1

Synthesis of 2a–h from 1 using sonication.

S. number	Substrate	Ar-CHO	Reagent	Time (min)	Product	M.P.; (°C)	Yield
a	1	–C6H5	H2O	10	2a	192–94	98
b	1	–C6H4–NO2-p	H2O	10	2b	248–50	93
c	1	–C6H4–NO2-m	H2O	11	2c	229–31	88
d	1	–C6H4–CH3-p	H2O	10	2d	240–42	87
e	1	–C6H4–CH3-o	H2O	11	2e	226–28	89
f	1	–C6H4–OH-p	H2O	10	2f	238–40	85
g	1	–C6H4–OH-o	H2O	13	2g	256–58	87
h	1	–C6H4–(OCH3)-p; –(OCH3)-m	H2O	12	2h	210–12	91