Ganapati D. Yadav, Sharad V. Lande
FULL PAPERS
Table 1 (cont.)
No. Reactant
Product
Enhancement factor[a] Time t [min] Yield [%] after time t
L-L PTC[b] L-L-L PTC[c]
11
12
6.0
4.6
60
60
28.6
33.5
96.7
95.4
The yield is the amount of product formed relative to the amount of substrate reacted. The yield is equal to selectivity here.
[a]
Enhancement factor is defined as the ratio of the initial rate of reaction under L-L-L PTC to that under L-L PTC (before
the third phase is created).
[b]
L-L PTC: nitroaromatics 0.0075 mol, sodium sulphide 0.1125 mol, TBAB 0.0025 mol, toluene 15 cm3, water 25 cm3, speed of
agitation 1500 rpm, temperature 808C.
L-L-L PTC: All same as for L-L PTC except TBAB 0.0075 (reusability of catalyst).
[c]
tinct and stable phases at the operating conditions (Figure 1).
The analysis of all reactions was done by GC (Chemito 8610)
using a stainless steel column (3.25 mmꢁ2 m) packed with a
liquid stationary phase of 10% SE-30, with a flame ionisation
detector.
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Isolation of the Product
The isolation of product is very simple. At the end of the reac-
tion, the organic phase, which contained the corresponding
amine and toluene, was washed with copious quantities of wa-
ter to remove any traces of catalyst and the solvent was distilled
under vacuum to get a pure product. All the products were also
confirmed by GC-MS. All the compounds reported are shown
in Table.1.
Acknowledgements
G. D. Yadav acknowledges Darbari Seth Endowment for sup-
porting the Chair. S. V.Lande acknowledges CSIR-NMITLI
for awarding JRF.
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Adv. Synth. Catal. 2005, 347, 1235–1241