Substituents and the yield of thiadiazoles 83a–p.

	R	R1	Yield (%)
a	Ph–	C6H5–CH CH (E)	82
b	Bn–	C6H5–CH CH (E)	75
c	CH2 CH–CH2–	C6H5–CH CH (E)	70
d	Ph–	2- MeO–C6H4–CH CH (E)	72
e	Bn–	2- MeO–C6H4–CH CH (E)	76
f	CH2 CH–CH2–	2- MeO–C6H4–CH CH (E)	68
g	Ph–	C6H5–CH C–Me2 (E)	84
h	Ph–	Me–(CH2)2–CH CH– (E)	83
i	Bn–	Me–(CH2)2–CH CH– (E)	65
j	CH2 CH–CH2–	Me–(CH2)2–CH CH– (E)	71
k	Ph–	Me–CH CH– (E)	75
l	Bn–	Me–CH CH– (E)	71
m	CH2 CH–CH2–	Me–CH CH– (E)	67
n	Ph–	Me2–CH–	76
o	Bn–	Me2–CH–	74
p	CH2 CH–CH2–	Me2–CH–	69