4
62
D. Chaturvedi and S. Ray
(
m, CH CH of n-butyl and n-octyl group), 1.29–1.33 (m, CH of n-octyl group), 1.35–1.39 (m, CH of
2
2
2
2
n-octyl group), 1.52–1.54 (m, CH of n-octyl group), 2.94–2.97 (t, NHCH of n-octyl), 4.02–4.05
2
2
(
t, CH –O– of n-butyl group), 7.5 (br, NH) ppm; MS: m=z ¼ 229.
2
Isoamyl n-octylcarbamate (1e, C H NO )
2
1
4
29
ꢁ
1
1
Oil; IR (Neat): ꢀꢀ ¼ 1702cm (O–CO–NH); H NMR (CDCl ): ꢁ ¼ 0.92–0.96 (t, CH of n-octyl
3
3
group), 1.01–1.05 (d, CH of i-amyl group), 1.29–1.33 (m, CH of n-octyl group), 1.53–1.55 (m, CH
2
3
2
of i-amyl and n-octyl group), 1.83–1.85 (m, CH of i-amyl group), 2.93–2.96 (t, NHCH of n-octyl),
2
4
.03–4.06 (t, CH –O– of i-amyl group), 7.7 (br, NH) ppm; MS: m=z ¼ 243.
2
Pentyl n-butylcarbamate (1f, C H NO )
2
1
0
21
ꢁ
1
1
Oil; IR (Neat): ꢀꢀ ¼ 1689 cm (O–CO–NH); H NMR (CDCl ): ꢁ ¼ 0.93–0.97 (t, CH of n-pentyl
3
3
and n-butyl group), 1.29–1.33 (m, CH of n-pentyl and n-butyl group), 1.55–1.58 (m, CH of
2
2
n-butyl and n-pentyl group), 2.93–2.96 (t, NHCH ), 4.03–4.06 (t, CH –O–), 7.6 (br, NH) ppm;
2
2
MS: m=z ¼ 187.
n-Hexyl cyclohexylcarbamate (1g, C H NO )
2
1
3
25
ꢁ
1
1
Oil; IR (Neat): ꢀꢀ ¼ 1698 cm (O–CO–NH); H NMR (CDCl ): ꢁ ¼ 0.94–0.98 (t, CH of n-hexyl
3
3
group), 1.29–1.33 (m, CH of n-hexyl group), 1.43–1.45 (m, CH of c-hexyl group), 1.58–1.66
2
2
(m, CH of n-hexyl and c-hexyl group), 3.54–3.56 (m, NHCH of c-hexyl), 4.03–4.06 (t, CH –O– of
2 2
n-hexyl group), 7.8 (br, NH) ppm; MS: m=z ¼ 227.
n-Hexyl n-propylcarbamate (1h, C H NO )
21
1
0
2
ꢁ
1
1
Oil; IR (Neat): ꢀꢀ ¼ 1694cm (O–CO–NH); H NMR (CDCl ): ꢁ ¼ 0.93–0.96 (t, CH of n-hexyl and
3
3
n-propyl group), 1.29–1.33 (m, CH of n-hexyl and n-propyl group), 1.56–1.59 (m, CH of n-hexyl
2
2
and n-propyl group), 2.94–2.97 (t, CH NH) 4.03–4.06 (t, CH –O– of n-hexyl group), 7.9 (br, NH)
2
2
ppm; MS: m=z ¼ 187.
n-Octyl m-methoxybenzylcarbamate (1i, C H NO )
1
7
27
3
ꢂ
ꢁ1
1
Mp 119 C; IR (KBr): ꢀꢀ ¼ 1701 cm (O–CO–NH); H NMR (CDCl ): ꢁ ¼ 0.93–0.96 (t, CH of
3
3
n-octyl group), 1.30–1.34 (m, CH of n-octyl group), 1.57–1.60 (m, CH of n-octyl group), 3.73
2
2
(s, OCH ), 4.06–4.09 (t, CH –O– of n-octyl group), 4.21–4.23 (d, CH NH), 7.7 (br, NH) ppm; MS:
3 2 2
m=z ¼ 293.
n-Decyl n-hexylcarbamate (1j, C H NO )
1
7
35
ꢁ1
2
ꢂ
1
Mp 105 C, IR (KBr): ꢀꢀ ¼ 1694cm (O–CO–NH); H NMR (CDCl ): ꢁ ¼ 0.94–0.97 (t, CH of
3
3
n-decyl and n-hexyl groups), 1.28–1.33 (m, CH of n-decyl and n-hexyl group), 1.56–1.59 (m, CH
2
2
of n-decyl and n-hexyl group), 2.94–2.96 (m, CH NH), 4.07–4.10 (t, CH –O– of n-decyl group), 7.8
2
2
(br, NH) ppm; MS: m=z ¼ 285.
2
-Phenylethyl diisopropylcarbamate (1m, C H NO )
15 23 2
ꢁ
1
1
Oil; IR (Neat): ꢀꢀ ¼ 1697 cm (O–CO–NH); H NMR (CDCl ): ꢁ ¼ 1.24–1.27 (d, CH of i-propyl
3
3
group), 2.81–2.84 (t, PhCH ), 3.92–3.97 (m, CH of i-propyl group), 4.41–4.44 (t, CH –O– of phenyl
2
2
group), 7.08–7.21 (m, Ph protons) ppm; MS: m=z ¼ 249.
Isobutyl n-octylcarbamate (1p, C H NO )
1
8
37
2
ꢁ
1
1
Oil; IR (Neat): ꢀꢀ ¼ 1696 cm (O–CO–NH); H NMR (CDCl ): ꢁ ¼ 0.95–0.98 (t, CH of i-butyl and
3
3
n-octyl group), 1.29–1.33 (m, CH of i-butyl and n-octyl group), 1.55–1.58 (m, CH of i-butyl and
2
2
n-octyl group), 2.94–2.96 (m, CH NH), 3.95–3.97 (m, CH –O– of i-butyl group), 7.8 (br, NH) ppm;
2
2
MS: m=z ¼ 299.