DIAZO REACTIONS WITH UNSATURATED COMPOUNDS: XII.
587
Constants, yields, and elemental analyses of the products of chloroalkylation of 1-( p-carboxybenzenesulfonyl)-1,3-buta-
diene p-HOOC C H SO CH=CH CHCl CH C H R-p
6
4
2
2 6 4
Yield, %
reactions
with
aryldiazonium
tetrachloro-
cuprates
Comp.
no.
reactions
with
aryldiazonium
chlorides
R
reactions
with
triazenes
mp, C
Found, %
Formula
Calculated, %
a
Ia
H
52
40
33
55
49
39
58
60
47
159 160 Cl 10.34, 10.02 C H ClO S
Cl 0.10
Cl 9.71
1
7
15
4
Ib CH3
Ic Br
177 178 Cl 9.91, 9.50
C H ClO S
18 17 4
193 194 (Cl+Br) 27.13, C H BrClO S (Cl+Br) 26.84
1
7
14
4
2
6.52
Id Clb
Ie O N
47
28
52
32
56
191 192 Cl 18.78, 18.11 C H Cl O S Cl 18.40
197 198 N 3.28, 3.33
Cl 8.90, 8.85
1
7
14
2 4
C H ClNO S N 3.53
2
17 14 6
Cl 8.95
a
b 1
1
1
7
-Aryl-3,3-dimethyl-1-triazenes.
H NMR spectrum, , ppm: 3.117 3.258 m (2H, CH ), 4.080 5.025 d.d (1H, CH, J 7.2, J
2 1 2
4.4 Hz), 6.856 6.893 d (1H, CH, J 14.8 Hz), 6.959 7.015 d.d (1H, CH, J 7.6, J 14.8 Hz), 7.196 7.245 t (4H, p-ClC H ), 7.852
.873 d (2H, p-O NC H ), 8.142 8.163 d (2H, p-O NC H ), 13.40 13.65 s (1H, COOH).
1
2
6 4
2
6
4
2
6 4
The suggested structure of Id well agrees with its
H NMR spectrum. The ethylene protons give a
doublet at 6.856 5.893 ppm and a doublet of doub-
lets at 6.959 7.015 ppm. The signal of the >CHCl
proton is manifested as a doublet of doublets at 4.949
.025 ppm. Large coupling constants (J 14.8 Hz) of
the ethylene protons are indicative of their trans
arrangement in Id.
was added in small portions. The reaction mixture was
heated on a water bath at 80 C for 2 h. The triethyl-
amine hydrochloride precipitate was filtered off, and
the benzene solution of the diene was evaporated at
reduced pressure. The oily residue was treated with
stirring with 16 ml of 10% HCl. The precipitate ob-
tained was separated and crystallized from a 1:2
ethanol water mixture to give 11 g (92.3%) of a white
crystalline substance, mp 174 175 C. Found, %: S
13.20, 13.78. C H O S. Calculated, %: S 13.45.
1
5
EXPERIMENTAL
1
1
10
4
1
All the attempts to obtain the adduct of this diene
with maleic anhydride failed. The reaction mixture
underwent tarring in the course of heating of an ace-
tone or dioxane solution of the reactants.
The H NMR spectra were taken on a Varian
Gemini-400 spectrometer in DMSO-d6.
1
-Aryl-3,3-dimethyl-1-triazenes were prepared by
azo coupling of the corresponding aryldiazonium
chlorides with dimethylamine [4].
1-(p-Carboxybenzenesulfonyl)-4-aryl-3-chloro-1-
butenes Ia Ie. a. To a mixture of 75 ml of acetone,
Aryldiazonium tetrachlorocuprates(II) were pre-
pared according to [5].
10 ml of water, 2 g of copper(II) chloride, and 11.91 g
of 1-(p-carboxybenzenesulfonyl)-1,3-butadiene,
solution of aryldiazonium chloride prepared from
.05 mol of appropriate aromatic amine, 17 ml of
a
1
-( p-Carboxybenzenesulfonyl)-4-chloro-2-bu-
0
tene was prepared similarly to 1-(p-nitrobenzenesul-
fonyl)-4-chloro-2-butene [6]. Butadiene, 0.1 mol,
reacted with a diazonium salt solution prepared from
concentrated hydrochloric acid, and 3.6 g of sodium
nitrite was added dropwise with stirring at 32 34 C.
The solutions of phenyl-, p-tolyl-, p-chlorophenyl-,
and p-bromophenyldiazonium chlorides were prelim-
inarily neutralized with sodium bicarbonate to pH
0
.05 mol of p-aminobenzoic acid to give 5.8 g (42%)
of a white crystalline substance, mp 202 203 C (from
:2 ethanol water). Found, %: Cl 12.76, 12.84.
C H ClO S. Calculated, %: Cl 12.90.
1
3
4. After the addition of the diazonium salt solution
1
1
11
4
was complete, the reaction mixture was stirred until
liberation of gaseous products ceased and then was
poured into 400 ml of water. The crystalline precip-
itate was separated and recrystallized from a 1:2
acetic acid water mixture.
1
-( p-Carboxybenzenesulfonyl)-1,3-butadiene.
To a solution of 0.05 mol of 1-(p-carboxybenzenesul-
fonyl)-4-chloro-2-butene in 130 ml of benzene, a solu-
tion of 0.1 mol of triethylamine in 20 ml of benzene
RUSSIAN JOURNAL OF GENERAL CHEMISTRY Vol. 77 No. 4 2007