Catalytic carbonylation process for synthesizing amide
A technology for synthesizing amides and catalysts, which is applied in the field of catalyzing the carbonylation of organic amines to produce corresponding amides. It can solve the problems of long exchange time, high gold loading, and complicated preparation process, and achieve simple composition, high catalytic efficiency, and simple reaction system. Effect
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Embodiment 1-3
[0029] Weigh 3 grams of Au(PPh 3 ) 2 Cl was dissolved in 100 ml of ethanol, and was added into 100 ml of tetraethylorthosilicate preheated to 60° C. under stirring. After it was mixed evenly, 35 ml of 1 mol / L hydrochloric acid was added, reacted and aged for 12 hours, and then vacuum-dried at 60° C. for 3 hours to obtain catalyst a.
[0030] Catalyst b was prepared by replacing 1 mole / liter hydrochloric acid with 0.5 mole / liter phosphoric acid, and the rest of the steps were the same as catalyst a.
[0031] 100 ml of tetraethyl orthosilicate was replaced by a mixture of 80 ml of tetraethyl orthosilicate and 20 ml of tetrabutyl titanate, and the remaining steps were the same as catalyst a to obtain catalyst c.
[0032] The specific gold content in each catalyst is shown in Table 1.
[0033] example
catalyst
Au(wt%)1
1
a
0.19
2
b
0.21
3
c
0.20
[0034] Add 2 grams of cata...
PUM

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